{"id":37902,"date":"2026-01-12T14:47:49","date_gmt":"2026-01-12T07:47:49","guid":{"rendered":"https:\/\/interdata.vn\/blog\/?p=37902"},"modified":"2026-01-28T10:20:39","modified_gmt":"2026-01-28T03:20:39","slug":"dmarc-la-gi","status":"publish","type":"post","link":"https:\/\/interdata.vn\/blog\/dmarc-la-gi\/","title":{"rendered":"DMARC l\u00e0 g\u00ec? A-Z ki\u1ebfn th\u1ee9c v\u00e0 c\u00e1ch tri\u1ec3n khai giao th\u1ee9c (2026)"},"content":{"rendered":"<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_84 counter-hierarchy ez-toc-counter ez-toc-white ez-toc-container-direction\">\n<div class=\"ez-toc-title-container\">\n<p class=\"ez-toc-title\" style=\"cursor:inherit\">N\u1ed8I DUNG<\/p>\n<span class=\"ez-toc-title-toggle\"><a href=\"#\" class=\"ez-toc-pull-right ez-toc-btn ez-toc-btn-xs ez-toc-btn-default ez-toc-toggle\" aria-label=\"Toggle Table of Content\"><span class=\"ez-toc-js-icon-con\"><span class=\"\"><span class=\"eztoc-hide\" style=\"display:none;\">Toggle<\/span><span class=\"ez-toc-icon-toggle-span\"><svg style=\"fill: #999;color:#999\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" class=\"list-377408\" width=\"20px\" height=\"20px\" viewBox=\"0 0 24 24\" fill=\"none\"><path d=\"M6 6H4v2h2V6zm14 0H8v2h12V6zM4 11h2v2H4v-2zm16 0H8v2h12v-2zM4 16h2v2H4v-2zm16 0H8v2h12v-2z\" fill=\"currentColor\"><\/path><\/svg><svg style=\"fill: #999;color:#999\" class=\"arrow-unsorted-368013\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"10px\" height=\"10px\" viewBox=\"0 0 24 24\" version=\"1.2\" baseProfile=\"tiny\"><path d=\"M18.2 9.3l-6.2-6.3-6.2 6.3c-.2.2-.3.4-.3.7s.1.5.3.7c.2.2.4.3.7.3h11c.3 0 .5-.1.7-.3.2-.2.3-.5.3-.7s-.1-.5-.3-.7zM5.8 14.7l6.2 6.3 6.2-6.3c.2-.2.3-.5.3-.7s-.1-.5-.3-.7c-.2-.2-.4-.3-.7-.3h-11c-.3 0-.5.1-.7.3-.2.2-.3.5-.3.7s.1.5.3.7z\"\/><\/svg><\/span><\/span><\/span><\/a><\/span><\/div>\n<nav><ul class='ez-toc-list ez-toc-list-level-1 eztoc-toggle-hide-by-default' ><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-1\" href=\"https:\/\/interdata.vn\/blog\/dmarc-la-gi\/#DMARC-la-gi\" >DMARC l\u00e0 g\u00ec?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/interdata.vn\/blog\/dmarc-la-gi\/#Tai-sao-doanh-nghiep-can-trien-khai-DMARC-ngay-lap-tuc\" >T\u1ea1i sao doanh nghi\u1ec7p c\u1ea7n tri\u1ec3n khai DMARC ngay l\u1eadp t\u1ee9c?<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/interdata.vn\/blog\/dmarc-la-gi\/#Giam-nguy-co-phishing-Tan-cong-gia-mao\" >Gi\u1ea3m nguy c\u01a1 phishing (T\u1ea5n c\u00f4ng gi\u1ea3 m\u1ea1o)<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/interdata.vn\/blog\/dmarc-la-gi\/#Gian-tiep-ho-tro-email-vao-Inbox-tot-hon\" >Gi\u00e1n ti\u1ebfp h\u1ed7 tr\u1ee3 email v\u00e0o Inbox t\u1ed1t h\u01a1n<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-5\" href=\"https:\/\/interdata.vn\/blog\/dmarc-la-gi\/#Bao-ve-thuong-hieu\" >B\u1ea3o v\u1ec7 th\u01b0\u01a1ng hi\u1ec7u<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-6\" href=\"https:\/\/interdata.vn\/blog\/dmarc-la-gi\/#Tang-ty-le-Delivery-Kha-nang-giao-nhan\" >T\u0103ng t\u1ef7 l\u1ec7 Delivery (Kh\u1ea3 n\u0103ng giao nh\u1eadn)<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-7\" href=\"https:\/\/interdata.vn\/blog\/dmarc-la-gi\/#Kha-nang-hien-thi-Visibility-qua-bao-cao\" >Kh\u1ea3 n\u0103ng hi\u1ec3n th\u1ecb (Visibility) qua b\u00e1o c\u00e1o<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-8\" href=\"https:\/\/interdata.vn\/blog\/dmarc-la-gi\/#Moi-quan-he-giua-SPF-DKIM-va-DMARC-trong-bao-mat-email\" >M\u1ed1i quan h\u1ec7 gi\u1eefa SPF, DKIM v\u00e0 DMARC trong b\u1ea3o m\u1eadt email<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-9\" href=\"https:\/\/interdata.vn\/blog\/dmarc-la-gi\/#SPF-Sender-Policy-Framework-la-gi\" >SPF (Sender Policy Framework) l\u00e0 g\u00ec?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-10\" href=\"https:\/\/interdata.vn\/blog\/dmarc-la-gi\/#DKIM-DomainKeys-Identified-Mail-la-gi\" >DKIM (DomainKeys Identified Mail) l\u00e0 g\u00ec?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-11\" href=\"https:\/\/interdata.vn\/blog\/dmarc-la-gi\/#Vai-tro-cua-DMARC-trong-moi-quan-he-nay\" >Vai tr\u00f2 c\u1ee7a DMARC trong m\u1ed1i quan h\u1ec7 n\u00e0y<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-12\" href=\"https:\/\/interdata.vn\/blog\/dmarc-la-gi\/#DMARC-giup-han-che-nhung-hinh-thuc-tan-cong-Email-nao\" >DMARC gi\u00fap h\u1ea1n ch\u1ebf nh\u1eefng h\u00ecnh th\u1ee9c t\u1ea5n c\u00f4ng Email n\u00e0o?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-13\" href=\"https:\/\/interdata.vn\/blog\/dmarc-la-gi\/#DMARC-khac-gi-so-voi-SPF-va-DKIM-trong-bao-mat-Email\" >DMARC kh\u00e1c g\u00ec so v\u1edbi SPF v\u00e0 DKIM trong b\u1ea3o m\u1eadt Email?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-14\" href=\"https:\/\/interdata.vn\/blog\/dmarc-la-gi\/#Khi-nao-doanh-nghiep-nen-trien-khai-DMARC\" >Khi n\u00e0o doanh nghi\u1ec7p n\u00ean tri\u1ec3n khai DMARC?<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-15\" href=\"https:\/\/interdata.vn\/blog\/dmarc-la-gi\/#Khi-ban-su-dung-email-theo-ten-mien-rieng\" >Khi b\u1ea1n s\u1eed d\u1ee5ng email theo t\u00ean mi\u1ec1n ri\u00eang<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-16\" href=\"https:\/\/interdata.vn\/blog\/dmarc-la-gi\/#Khi-ban-thuc-hien-cac-chien-dich-Email-Marketing\" >Khi b\u1ea1n th\u1ef1c hi\u1ec7n c\u00e1c chi\u1ebfn d\u1ecbch Email Marketing<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-17\" href=\"https:\/\/interdata.vn\/blog\/dmarc-la-gi\/#Khi-doanh-nghiep-gap-van-de-ve-Spam-hoac-Gia-mao\" >Khi doanh nghi\u1ec7p g\u1eb7p v\u1ea5n \u0111\u1ec1 v\u1ec1 Spam ho\u1eb7c Gi\u1ea3 m\u1ea1o<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-18\" href=\"https:\/\/interdata.vn\/blog\/dmarc-la-gi\/#Khi-ban-thuoc-cac-nganh-nhay-cam-ve-du-lieu\" >Khi b\u1ea1n thu\u1ed9c c\u00e1c ng\u00e0nh nh\u1ea1y c\u1ea3m v\u1ec1 d\u1eef li\u1ec7u<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-19\" href=\"https:\/\/interdata.vn\/blog\/dmarc-la-gi\/#Cach-tao-DMARC-Record-dung-chuan-han-che-rui-ro\" >C\u00e1ch t\u1ea1o DMARC Record \u0111\u00fang chu\u1ea9n, h\u1ea1n ch\u1ebf r\u1ee7i ro<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-20\" href=\"https:\/\/interdata.vn\/blog\/dmarc-la-gi\/#DMARC-Record-la-gi\" >DMARC Record l\u00e0 g\u00ec?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-21\" href=\"https:\/\/interdata.vn\/blog\/dmarc-la-gi\/#Buoc-1-Tao-ban-ghi-DMARC-trong-DNS\" >B\u01b0\u1edbc 1: T\u1ea1o b\u1ea3n ghi DMARC trong DNS<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-22\" href=\"https:\/\/interdata.vn\/blog\/dmarc-la-gi\/#Buoc-2-Phan-tich-bao-cao-DMARC-DMARC-Report\" >B\u01b0\u1edbc 2: Ph\u00e2n t\u00edch b\u00e1o c\u00e1o DMARC (DMARC Report)<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-23\" href=\"https:\/\/interdata.vn\/blog\/dmarc-la-gi\/#Buoc-3-Xac-dinh-va-gan-DMARC-cho-cac-nguon-gui-hop-le\" >B\u01b0\u1edbc 3: X\u00e1c \u0111\u1ecbnh v\u00e0 g\u00e1n DMARC cho c\u00e1c ngu\u1ed3n g\u1eedi h\u1ee3p l\u1ec7<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-24\" href=\"https:\/\/interdata.vn\/blog\/dmarc-la-gi\/#Buoc-4-Ap-dung-chinh-sach-DMARC-vao-thuc-te\" >B\u01b0\u1edbc 4: \u00c1p d\u1ee5ng ch\u00ednh s\u00e1ch DMARC v\u00e0o th\u1ef1c t\u1ebf<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-25\" href=\"https:\/\/interdata.vn\/blog\/dmarc-la-gi\/#Cac-sai-lam-thuong-gap-khi-trien-khai-DMARC\" >C\u00e1c sai l\u1ea7m th\u01b0\u1eddng g\u1eb7p khi tri\u1ec3n khai DMARC<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-26\" href=\"https:\/\/interdata.vn\/blog\/dmarc-la-gi\/#Bat-preject-qua-voi-vang\" >B\u1eadt p=reject qu\u00e1 v\u1ed9i v\u00e0ng<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-27\" href=\"https:\/\/interdata.vn\/blog\/dmarc-la-gi\/#Khong-cau-hinh-hoac-cau-hinh-sai-SPFDKIM-truoc\" >Kh\u00f4ng c\u1ea5u h\u00ecnh ho\u1eb7c c\u1ea5u h\u00ecnh sai SPF\/DKIM tr\u01b0\u1edbc<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-28\" href=\"https:\/\/interdata.vn\/blog\/dmarc-la-gi\/#Quen-thiet-lap-dia-chi-nhan-bao-cao-rua\" >Qu\u00ean thi\u1ebft l\u1eadp \u0111\u1ecba ch\u1ec9 nh\u1eadn b\u00e1o c\u00e1o (rua)<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-29\" href=\"https:\/\/interdata.vn\/blog\/dmarc-la-gi\/#Cau-hinh-sai-cu-phap-trong-DNS\" >C\u1ea5u h\u00ecnh sai c\u00fa ph\u00e1p trong DNS<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-30\" href=\"https:\/\/interdata.vn\/blog\/dmarc-la-gi\/#Ket-luan\" >K\u1ebft lu\u1eadn<\/a><\/li><\/ul><\/nav><\/div>\n<p>Trong b\u1ed1i c\u1ea3nh email gi\u1ea3 m\u1ea1o, <a href=\"https:\/\/interdata.vn\/blog\/tan-cong-phishing-la-gi\/\">phishing<\/a> v\u00e0 spam ng\u00e0y c\u00e0ng tinh vi, vi\u1ec7c b\u1ea3o v\u1ec7 <a href=\"https:\/\/interdata.vn\/blog\/domain-la-gi\/\">t\u00ean mi\u1ec1n<\/a> g\u1eedi email \u0111\u00e3 tr\u1edf th\u00e0nh y\u00eau c\u1ea7u b\u1eaft bu\u1ed9c \u0111\u1ed1i v\u1edbi doanh nghi\u1ec7p v\u00e0 ch\u1ee7 <a href=\"https:\/\/interdata.vn\/blog\/website-la-gi\/\">website<\/a>. DMARC l\u00e0 m\u1ed9t trong nh\u1eefng giao th\u1ee9c x\u00e1c th\u1ef1c email quan tr\u1ecdng gi\u00fap ng\u0103n ch\u1eb7n h\u00e0nh vi gi\u1ea3 m\u1ea1o domain, n\u00e2ng cao \u0111\u1ed9 tin c\u1eady c\u1ee7a email g\u1eedi \u0111i v\u00e0 b\u1ea3o v\u1ec7 uy t\u00edn th\u01b0\u01a1ng hi\u1ec7u.<\/p>\n<p>V\u1eady giao th\u1ee9c DMARC l\u00e0 g\u00ec, giao th\u1ee9c n\u00e0y ho\u1ea1t \u0111\u1ed9ng nh\u01b0 th\u1ebf n\u00e0o v\u00e0 v\u00ec sao n\u00f3 \u0111\u00f3ng vai tr\u00f2 then ch\u1ed1t trong h\u1ec7 th\u1ed1ng b\u1ea3o m\u1eadt email hi\u1ec7n \u0111\u1ea1i? Trong b\u00e0i vi\u1ebft n\u00e0y, ch\u00fang ta s\u1ebd c\u00f9ng t\u00ecm hi\u1ec3u to\u00e0n di\u1ec7n v\u1ec1 DMARC, t\u1eeb kh\u00e1i ni\u1ec7m c\u01a1 b\u1ea3n, c\u01a1 ch\u1ebf ho\u1ea1t \u0111\u1ed9ng cho \u0111\u1ebfn l\u1ee3i \u00edch v\u00e0 c\u00e1ch tri\u1ec3n khai hi\u1ec7u qu\u1ea3 cho t\u00ean mi\u1ec1n c\u1ee7a b\u1ea1n.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"DMARC-la-gi\"><\/span>DMARC l\u00e0 g\u00ec?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p><strong>DMARC<\/strong> l\u00e0 vi\u1ebft t\u1eaft c\u1ee7a Domain-based Message <a href=\"https:\/\/interdata.vn\/blog\/authentication-la-gi\/\">Authentication<\/a>, Reporting, and Conformance l\u00e0 m\u1ed9t giao th\u1ee9c x\u00e1c th\u1ef1c email gi\u00fap ch\u1ee7 s\u1edf h\u1eefu t\u00ean mi\u1ec1n ki\u1ec3m so\u00e1t c\u00e1ch c\u00e1c email g\u1eedi t\u1eeb domain c\u1ee7a m\u00ecnh \u0111\u01b0\u1ee3c x\u00e1c minh v\u00e0 x\u1eed l\u00fd.<\/p>\n<p>Hi\u1ec3u m\u1ed9t c\u00e1ch \u0111\u01a1n gi\u1ea3n theo ng\u00f4n ng\u1eef c\u1ee7a ng\u01b0\u1eddi l\u00e0m kinh doanh, DMARC gi\u1ed1ng nh\u01b0 m\u1ed9t &#8220;<em>tr\u1ea1m ki\u1ec3m so\u00e1t an ninh<\/em>&#8221; nghi\u00eam ng\u1eb7t t\u1ea1i s\u00e2n bay. Khi m\u1ed9t email \u0111\u01b0\u1ee3c g\u1eedi \u0111i t\u1eeb t\u00ean mi\u1ec1n doanh nghi\u1ec7p c\u1ee7a b\u1ea1n, n\u00f3 gi\u1ed1ng nh\u01b0 m\u1ed9t h\u00e0nh kh\u00e1ch mu\u1ed1n l\u00ean m\u00e1y bay.<\/p>\n<p>Tr\u01b0\u1edbc \u0111\u00f3, b\u1ea1n \u0111\u00e3 c\u00f3 SPF (gi\u1ed1ng nh\u01b0 danh s\u00e1ch h\u00e0nh kh\u00e1ch h\u1ee3p l\u1ec7) v\u00e0 <a href=\"https:\/\/interdata.vn\/blog\/dkim-la-gi\/\">DKIM<\/a> (gi\u1ed1ng nh\u01b0 h\u1ed9 chi\u1ebfu c\u00f3 ch\u1eef k\u00fd x\u00e1c th\u1ef1c). Tuy nhi\u00ean, n\u1ebfu kh\u00f4ng c\u00f3 ng\u01b0\u1eddi qu\u1ea3n l\u00fd t\u1ea1i c\u1eeda an ninh \u0111\u1ec3 quy\u1ebft \u0111\u1ecbnh xem ng\u01b0\u1eddi c\u00f3 h\u1ed9 chi\u1ebfu nh\u01b0ng kh\u00f4ng c\u00f3 trong danh s\u00e1ch th\u00ec x\u1eed l\u00fd th\u1ebf n\u00e0o, h\u1ec7 th\u1ed1ng s\u1ebd tr\u1edf n\u00ean l\u1ecfng l\u1ebbo.<\/p>\n<p>DMARC ch\u00ednh l\u00e0 ng\u01b0\u1eddi qu\u1ea3n l\u00fd \u0111\u00f3. Giao th\u1ee9c DMARC cho ph\u00e9p ch\u1ee7 s\u1edf h\u1eefu t\u00ean mi\u1ec1n c\u00f4ng b\u1ed1 m\u1ed9t ch\u00ednh s\u00e1ch b\u1ea3o m\u1eadt c\u1ee5 th\u1ec3 th\u00f4ng qua c\u00e1c b\u1ea3n ghi <a href=\"https:\/\/interdata.vn\/blog\/dns-la-gi\/\">DNS<\/a> (H\u1ec7 th\u1ed1ng t\u00ean mi\u1ec1n). Ch\u00ednh s\u00e1ch n\u00e0y s\u1ebd h\u01b0\u1edbng d\u1eabn <a href=\"https:\/\/interdata.vn\/blog\/may-chu-server-la-gi\/\">m\u00e1y ch\u1ee7<\/a> nh\u1eadn th\u01b0 (nh\u01b0 Gmail, Outlook) bi\u1ebft ph\u1ea3i l\u00e0m g\u00ec n\u1ebfu m\u1ed9t email t\u1ef1 x\u01b0ng l\u00e0 \u0111\u1ebfn t\u1eeb c\u00f4ng ty b\u1ea1n nh\u01b0ng l\u1ea1i kh\u00f4ng v\u01b0\u1ee3t qua \u0111\u01b0\u1ee3c c\u00e1c b\u00e0i ki\u1ec3m tra x\u00e1c th\u1ef1c SPF ho\u1eb7c DKIM.<\/p>\n<figure id=\"attachment_37904\" aria-describedby=\"caption-attachment-37904\" style=\"width: 800px\" class=\"wp-caption aligncenter\"><img loading=\"lazy\" decoding=\"async\" class=\"size-full wp-image-37904\" src=\"https:\/\/interdata.vn\/blog\/wp-content\/uploads\/2026\/01\/DMARC-la-gi.jpg\" alt=\"DMARC l\u00e0 g\u00ec?\" width=\"800\" height=\"500\" title=\"\" srcset=\"https:\/\/interdata.vn\/blog\/wp-content\/uploads\/2026\/01\/DMARC-la-gi.jpg 800w, https:\/\/interdata.vn\/blog\/wp-content\/uploads\/2026\/01\/DMARC-la-gi-300x188.jpg 300w, https:\/\/interdata.vn\/blog\/wp-content\/uploads\/2026\/01\/DMARC-la-gi-768x480.jpg 768w\" sizes=\"auto, (max-width: 800px) 100vw, 800px\" \/><figcaption id=\"caption-attachment-37904\" class=\"wp-caption-text\">DMARC l\u00e0 g\u00ec?<\/figcaption><\/figure>\n<p>Khi t\u00ecm hi\u1ec3u giao th\u1ee9c b\u1ea3o m\u1eadt <strong>DMARC l\u00e0 g\u00ec<\/strong>, b\u1ea1n c\u1ea7n n\u1eafm b\u1eaft ba kh\u00eda c\u1ea1nh ch\u00ednh trong t\u00ean g\u1ecdi c\u1ee7a n\u00f3:<\/p>\n<ol>\n<li><strong>Domain-based (D\u1ef1a tr\u00ean t\u00ean mi\u1ec1n):<\/strong> Giao th\u1ee9c n\u00e0y ho\u1ea1t \u0111\u1ed9ng g\u1eafn li\u1ec1n v\u1edbi t\u00ean mi\u1ec1n website c\u1ee7a doanh nghi\u1ec7p.<\/li>\n<li><strong>Message Authentication (X\u00e1c th\u1ef1c th\u00f4ng \u0111i\u1ec7p):<\/strong> Ki\u1ec3m tra xem email c\u00f3 th\u1ef1c s\u1ef1 \u0111\u1ebfn t\u1eeb ng\u01b0\u1eddi g\u1eedi h\u1ee3p l\u1ec7 hay kh\u00f4ng.<\/li>\n<li><strong>Reporting &amp; Conformance (B\u00e1o c\u00e1o &amp; S\u1ef1 tu\u00e2n th\u1ee7):<\/strong> \u0110\u00e2y l\u00e0 \u0111i\u1ec3m \u0111\u1eb7c bi\u1ec7t nh\u1ea5t. DMARC kh\u00f4ng ch\u1ec9 ch\u1eb7n ho\u1eb7c cho qua, giao th\u1ee9c n\u00e0y c\u00f2n g\u1eedi b\u00e1o c\u00e1o v\u1ec1 cho b\u1ea1n bi\u1ebft ai \u0111ang g\u1eedi email d\u01b0\u1edbi danh ngh\u0129a c\u1ee7a b\u1ea1n.<\/li>\n<\/ol>\n<p>C\u01a1 ch\u1ebf ho\u1ea1t \u0111\u1ed9ng c\u1ee7a DMARC d\u1ef1a tr\u00ean vi\u1ec7c c\u00f4ng khai m\u1ed9t b\u1ea3n ghi (record) d\u1ea1ng v\u0103n b\u1ea3n (TXT record) l\u00ean h\u1ec7 th\u1ed1ng DNS. Khi m\u00e1y ch\u1ee7 nh\u1eadn mail th\u1ea5y b\u1ea3n ghi n\u00e0y, h\u1ecd s\u1ebd th\u1ef1c hi\u1ec7n theo \u0111\u00fang ch\u1ec9 d\u1eabn m\u00e0 b\u1ea1n \u0111\u00e3 thi\u1ebft l\u1eadp. Vi\u1ec7c hi\u1ec3u r\u00f5 <strong>DMARC l\u00e0 g\u00ec<\/strong> l\u00e0 b\u01b0\u1edbc \u0111\u1ea7u ti\u00ean v\u00e0 quan tr\u1ecdng nh\u1ea5t \u0111\u1ec3 b\u1ea1n gi\u00e0nh l\u1ea1i quy\u1ec1n ki\u1ec3m so\u00e1t h\u1ec7 th\u1ed1ng email doanh nghi\u1ec7p c\u1ee7a m\u00ecnh.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"Tai-sao-doanh-nghiep-can-trien-khai-DMARC-ngay-lap-tuc\"><\/span>T\u1ea1i sao doanh nghi\u1ec7p c\u1ea7n tri\u1ec3n khai DMARC ngay l\u1eadp t\u1ee9c?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>Trong b\u1ed1i c\u1ea3nh an ninh m\u1ea1ng hi\u1ec7n nay, vi\u1ec7c ch\u1ec9 g\u1eedi \u0111\u01b0\u1ee3c email \u0111i l\u00e0 ch\u01b0a \u0111\u1ee7. C\u00e1c \u00f4ng l\u1edbn trong ng\u00e0nh c\u00f4ng ngh\u1ec7 nh\u01b0 Google v\u00e0 Yahoo \u0111\u00e3 ch\u00ednh th\u1ee9c \u00e1p d\u1ee5ng c\u00e1c quy \u0111\u1ecbnh m\u1edbi t\u1eeb th\u00e1ng 2 n\u0103m 2024, y\u00eau c\u1ea7u c\u00e1c \u0111\u01a1n v\u1ecb g\u1eedi email s\u1ed1 l\u01b0\u1ee3ng l\u1edbn b\u1eaft bu\u1ed9c ph\u1ea3i c\u00f3 x\u00e1c th\u1ef1c DMARC. N\u1ebfu doanh nghi\u1ec7p c\u1ee7a b\u1ea1n v\u1eabn th\u1edd \u01a1, r\u1ee7i ro email b\u1ecb ch\u1eb7n l\u00e0 r\u1ea5t cao.<\/p>\n<p>D\u01b0\u1edbi \u0111\u00e2y l\u00e0 nh\u1eefng l\u00fd do c\u1ee5 th\u1ec3 gi\u1ea3i th\u00edch t\u1ea1i sao vi\u1ec7c tri\u1ec3n khai DMARC\u00a0l\u1ea1i c\u1ea5p b\u00e1ch \u0111\u1ebfn v\u1eady.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Giam-nguy-co-phishing-Tan-cong-gia-mao\"><\/span>Gi\u1ea3m nguy c\u01a1 phishing (T\u1ea5n c\u00f4ng gi\u1ea3 m\u1ea1o)<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>Phishing hay t\u1ea5n c\u00f4ng l\u1eeba \u0111\u1ea3o qua email l\u00e0 n\u1ed7i \u00e1m \u1ea3nh c\u1ee7a m\u1ecdi t\u1ed5 ch\u1ee9c. K\u1ebb x\u1ea5u th\u01b0\u1eddng s\u1eed d\u1ee5ng k\u1ef9 thu\u1eadt &#8220;Email Spoofing&#8221; \u2013 t\u1ee9c l\u00e0 gi\u1ea3 m\u1ea1o \u0111\u1ecba ch\u1ec9 g\u1eedi \u0111\u1ec3 tr\u00f4ng gi\u1ed1ng h\u1ec7t nh\u01b0 email t\u1eeb CEO ho\u1eb7c ph\u00f2ng k\u1ebf to\u00e1n c\u1ee7a c\u00f4ng ty b\u1ea1n. M\u1ee5c \u0111\u00edch th\u01b0\u1eddng l\u00e0 l\u1eeba nh\u00e2n vi\u00ean chuy\u1ec3n ti\u1ec1n ho\u1eb7c \u0111\u00e1nh c\u1eafp th\u00f4ng tin m\u1eadt.<\/p>\n<p>Khi ch\u01b0a c\u00f3 DMARC, k\u1ebb gian c\u00f3 th\u1ec3 d\u1ec5 d\u00e0ng m\u1ea1o danh t\u00ean mi\u1ec1n c\u1ee7a b\u1ea1n \u0111\u1ec3 g\u1eedi th\u01b0 cho kh\u00e1ch h\u00e0ng ho\u1eb7c \u0111\u1ed1i t\u00e1c. Nh\u01b0ng khi \u0111\u00e3 c\u1ea5u h\u00ecnh DMARC v\u1edbi ch\u00ednh s\u00e1ch ph\u00f9 h\u1ee3p, h\u1ec7 th\u1ed1ng s\u1ebd t\u1ef1 \u0111\u1ed9ng nh\u1eadn di\u1ec7n c\u00e1c email gi\u1ea3 m\u1ea1o n\u00e0y (do kh\u00f4ng kh\u1edbp ch\u1eef k\u00fd DKIM ho\u1eb7c <a href=\"https:\/\/interdata.vn\/blog\/dia-chi-ip-la-gi\/\">\u0111\u1ecba ch\u1ec9 IP<\/a> trong SPF) v\u00e0 ch\u1eb7n ch\u00fang l\u1ea1i tr\u01b0\u1edbc khi ch\u00fang k\u1ecbp ti\u1ebfp c\u1eadn h\u1ed9p th\u01b0 \u0111\u1ebfn c\u1ee7a n\u1ea1n nh\u00e2n. \u0110\u00e2y l\u00e0 l\u1edbp khi\u00ean b\u1ea3o v\u1ec7 ch\u1ee7 \u0111\u1ed9ng, gi\u00fap gi\u1eef g\u00ecn h\u00ecnh \u1ea3nh chuy\u00ean nghi\u1ec7p v\u00e0 an to\u00e0n cho doanh nghi\u1ec7p.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Gian-tiep-ho-tro-email-vao-Inbox-tot-hon\"><\/span>Gi\u00e1n ti\u1ebfp h\u1ed7 tr\u1ee3 email v\u00e0o Inbox t\u1ed1t h\u01a1n<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>M\u1ed9t trong nh\u1eefng ch\u1ec9 s\u1ed1 quan tr\u1ecdng nh\u1ea5t c\u1ee7a Email Marketing l\u00e0 t\u1ef7 l\u1ec7 v\u00e0o h\u1ed9p th\u01b0 \u0111\u1ebfn (Inbox Placement Rate). C\u00e1c b\u1ed9 l\u1ecdc th\u01b0 r\u00e1c (Spam filters) c\u1ee7a Google hay Microsoft ng\u00e0y c\u00e0ng th\u00f4ng minh. Ch\u00fang \u0111\u00e1nh gi\u00e1 \u0111\u1ed9 uy t\u00edn c\u1ee7a t\u00ean mi\u1ec1n (Domain Reputation) d\u1ef1a tr\u00ean l\u1ecbch s\u1eed g\u1eedi v\u00e0 c\u00e1c giao th\u1ee9c x\u00e1c th\u1ef1c.<\/p>\n<p>N\u1ebfu t\u00ean mi\u1ec1n c\u1ee7a b\u1ea1n kh\u00f4ng c\u00f3 ti\u00eau chu\u1ea9n DMARC, c\u00e1c b\u1ed9 l\u1ecdc n\u00e0y s\u1ebd \u0111\u1eb7t d\u1ea5u h\u1ecfi l\u1edbn v\u1ec1 t\u00ednh x\u00e1c th\u1ef1c c\u1ee7a ngu\u1ed3n g\u1eedi. Ng\u01b0\u1ee3c l\u1ea1i, vi\u1ec7c tri\u1ec3n khai DMARC g\u1eedi \u0111i m\u1ed9t t\u00edn hi\u1ec7u m\u1ea1nh m\u1ebd r\u1eb1ng: &#8220;T\u00ean mi\u1ec1n n\u00e0y \u0111\u01b0\u1ee3c qu\u1ea3n l\u00fd ch\u1eb7t ch\u1ebd, m\u1ecdi email t\u1eeb \u0111\u00e2y \u0111\u1ec1u \u0111\u01b0\u1ee3c x\u00e1c th\u1ef1c&#8221;. \u0110i\u1ec1u n\u00e0y gi\u00fap t\u0103ng \u0111\u1ed9 tin c\u1eady c\u1ee7a t\u00ean mi\u1ec1n, t\u1eeb \u0111\u00f3 c\u1ea3i thi\u1ec7n \u0111\u00e1ng k\u1ec3 t\u1ef7 l\u1ec7 email ti\u1ebfp th\u1ecb ho\u1eb7c email giao d\u1ecbch v\u00e0o th\u1eb3ng Inbox thay v\u00ec n\u1eb1m bu\u1ed3n b\u00e3 trong m\u1ee5c Spam.<\/p>\n<figure id=\"attachment_37905\" aria-describedby=\"caption-attachment-37905\" style=\"width: 800px\" class=\"wp-caption aligncenter\"><img loading=\"lazy\" decoding=\"async\" class=\"size-full wp-image-37905\" src=\"https:\/\/interdata.vn\/blog\/wp-content\/uploads\/2026\/01\/Ly-do-can-trien-khai-DMARC-ngay.jpg\" alt=\"L\u00fd do c\u1ea7n tri\u1ec3n khai DMARC ngay\" width=\"800\" height=\"500\" title=\"\" srcset=\"https:\/\/interdata.vn\/blog\/wp-content\/uploads\/2026\/01\/Ly-do-can-trien-khai-DMARC-ngay.jpg 800w, https:\/\/interdata.vn\/blog\/wp-content\/uploads\/2026\/01\/Ly-do-can-trien-khai-DMARC-ngay-300x188.jpg 300w, https:\/\/interdata.vn\/blog\/wp-content\/uploads\/2026\/01\/Ly-do-can-trien-khai-DMARC-ngay-768x480.jpg 768w\" sizes=\"auto, (max-width: 800px) 100vw, 800px\" \/><figcaption id=\"caption-attachment-37905\" class=\"wp-caption-text\">L\u00fd do c\u1ea7n tri\u1ec3n khai DMARC ngay?<\/figcaption><\/figure>\n<h3><span class=\"ez-toc-section\" id=\"Bao-ve-thuong-hieu\"><\/span>B\u1ea3o v\u1ec7 th\u01b0\u01a1ng hi\u1ec7u<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>Th\u01b0\u01a1ng hi\u1ec7u l\u00e0 t\u00e0i s\u1ea3n v\u00f4 h\u00ecnh gi\u00e1 tr\u1ecb nh\u1ea5t. H\u00e3y t\u01b0\u1edfng t\u01b0\u1ee3ng kh\u00e1ch h\u00e0ng nh\u1eadn \u0111\u01b0\u1ee3c m\u1ed9t email l\u1eeba \u0111\u1ea3o v\u1edbi \u0111u\u00f4i t\u00ean mi\u1ec1n @congtyban.com. D\u00f9 b\u1ea1n kh\u00f4ng g\u1eedi email \u0111\u00f3, nh\u01b0ng s\u1ef1 tin t\u01b0\u1edfng c\u1ee7a kh\u00e1ch h\u00e0ng d\u00e0nh cho th\u01b0\u01a1ng hi\u1ec7u s\u1ebd s\u1ee5t gi\u1ea3m nghi\u00eam tr\u1ecdng.<\/p>\n<p>Tri\u1ec3n khai giao th\u1ee9c b\u1ea3o m\u1eadt DMARC gi\u00fap b\u1ea1n ng\u0103n ch\u1eb7n vi\u1ec7c l\u1ea1m d\u1ee5ng th\u01b0\u01a1ng hi\u1ec7u. B\u1ea1n n\u1eafm quy\u1ec1n ki\u1ec3m so\u00e1t ai \u0111\u01b0\u1ee3c ph\u00e9p v\u00e0 ai kh\u00f4ng \u0111\u01b0\u1ee3c ph\u00e9p s\u1eed d\u1ee5ng danh t\u00ednh doanh nghi\u1ec7p m\u00ecnh tr\u00ean m\u00f4i tr\u01b0\u1eddng <a href=\"https:\/\/interdata.vn\/blog\/mang-internet\/\">internet<\/a>. \u0110\u1ed1i v\u1edbi c\u00e1c doanh nghi\u1ec7p t\u00e0i ch\u00ednh, ng\u00e2n h\u00e0ng hay th\u01b0\u01a1ng m\u1ea1i \u0111i\u1ec7n t\u1eed, \u0111\u00e2y kh\u00f4ng c\u00f2n l\u00e0 l\u1ef1a ch\u1ecdn m\u00e0 l\u00e0 y\u00eau c\u1ea7u s\u1ed1ng c\u00f2n \u0111\u1ec3 b\u1ea3o v\u1ec7 uy t\u00edn.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Tang-ty-le-Delivery-Kha-nang-giao-nhan\"><\/span>T\u0103ng t\u1ef7 l\u1ec7 Delivery (Kh\u1ea3 n\u0103ng giao nh\u1eadn)<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>T\u1ef7 l\u1ec7 Delivery kh\u00e1c v\u1edbi t\u1ef7 l\u1ec7 v\u00e0o Inbox. Delivery l\u00e0 vi\u1ec7c email \u0111\u01b0\u1ee3c m\u00e1y ch\u1ee7 b\u00ean kia ch\u1ea5p nh\u1eadn (kh\u00f4ng b\u1ecb tr\u1ea3 l\u1ea1i &#8211; Bounce). Khi b\u1ea1n hi\u1ec3u r\u00f5 v\u1ec1 giao th\u1ee9c DMARC\u00a0v\u00e0 c\u1ea5u h\u00ecnh \u0111\u00fang, b\u1ea1n gi\u1ea3m thi\u1ec3u \u0111\u01b0\u1ee3c t\u00ecnh tr\u1ea1ng email h\u1ee3p l\u1ec7 b\u1ecb c\u00e1c h\u1ec7 th\u1ed1ng b\u1ea3o m\u1eadt ch\u1eb7n nh\u1ea7m.<\/p>\n<p>\u0110\u1eb7c bi\u1ec7t, v\u1edbi c\u00e1c quy \u0111\u1ecbnh m\u1edbi c\u1ee7a Google, n\u1ebfu t\u1ef7 l\u1ec7 spam c\u1ee7a b\u1ea1n v\u01b0\u1ee3t qu\u00e1 0.3% v\u00e0 kh\u00f4ng c\u00f3 DMARC, kh\u1ea3 n\u0103ng cao l\u00e0 to\u00e0n b\u1ed9 email t\u1eeb t\u00ean mi\u1ec1n c\u1ee7a b\u1ea1n s\u1ebd c\u00f3 nguy c\u01a1 b\u1ecb ch\u1eb7n cao h\u01a1n. DMARC gi\u00fap b\u1ea1n tu\u00e2n th\u1ee7 lu\u1eadt ch\u01a1i c\u1ee7a c\u00e1c nh\u00e0 cung c\u1ea5p d\u1ecbch v\u1ee5 email l\u1edbn, \u0111\u1ea3m b\u1ea3o d\u00f2ng ch\u1ea3y th\u00f4ng tin li\u00ean l\u1ea1c c\u1ee7a doanh nghi\u1ec7p lu\u00f4n th\u00f4ng su\u1ed1t.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Kha-nang-hien-thi-Visibility-qua-bao-cao\"><\/span>Kh\u1ea3 n\u0103ng hi\u1ec3n th\u1ecb (Visibility) qua b\u00e1o c\u00e1o<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>M\u1ed9t l\u1ee3i \u00edch to l\u1edbn nh\u01b0ng th\u01b0\u1eddng b\u1ecb b\u1ecf qua c\u1ee7a DMARC l\u00e0 kh\u1ea3 n\u0103ng b\u00e1o c\u00e1o (Reporting). Kh\u00e1c v\u1edbi SPF v\u00e0 DKIM ch\u1ec9 ho\u1ea1t \u0111\u1ed9ng ng\u1ea7m, DMARC g\u1eedi cho qu\u1ea3n tr\u1ecb vi\u00ean c\u00e1c b\u00e1o c\u00e1o \u0111\u1ecbnh k\u1ef3 (th\u01b0\u1eddng l\u00e0 h\u00e0ng ng\u00e0y).<\/p>\n<p>Nh\u1edd c\u00e1c b\u00e1o c\u00e1o n\u00e0y, b\u1ea1n c\u00f3 th\u1ec3 nh\u00ecn th\u1ea5y to\u00e0n c\u1ea3nh b\u1ee9c tranh email c\u1ee7a doanh nghi\u1ec7p:<\/p>\n<ul>\n<li>C\u00f3 bao nhi\u00eau email \u0111\u01b0\u1ee3c g\u1eedi \u0111i d\u01b0\u1edbi danh ngh\u0129a t\u00ean mi\u1ec1n c\u1ee7a b\u1ea1n m\u1ed7i ng\u00e0y?<\/li>\n<li>Nh\u1eefng email n\u00e0y xu\u1ea5t ph\u00e1t t\u1eeb \u0111\u00e2u (\u0111\u1ecba ch\u1ec9 IP n\u00e0o)?<\/li>\n<li>Ch\u00fang c\u00f3 v\u01b0\u1ee3t qua b\u00e0i ki\u1ec3m tra x\u00e1c th\u1ef1c kh\u00f4ng?<\/li>\n<li>C\u00f3 ai \u0111ang c\u1ed1 g\u1eafng gi\u1ea3 m\u1ea1o t\u00ean mi\u1ec1n c\u1ee7a b\u1ea1n kh\u00f4ng?<\/li>\n<\/ul>\n<p>Th\u00f4ng tin n\u00e0y c\u1ef1c k\u1ef3 qu\u00fd gi\u00e1 gi\u00fap \u0111\u1ed9i ng\u0169 IT t\u1ea1i <strong>InterData<\/strong> ho\u1eb7c ch\u00ednh b\u1ed9 ph\u1eadn k\u1ef9 thu\u1eadt c\u1ee7a b\u1ea1n ph\u00e1t hi\u1ec7n s\u1edbm c\u00e1c <a href=\"https:\/\/interdata.vn\/blog\/lo-hong-bao-mat-la-gi\/\">l\u1ed7 h\u1ed5ng b\u1ea3o m\u1eadt<\/a> ho\u1eb7c c\u00e1c chi\u1ebfn d\u1ecbch t\u1ea5n c\u00f4ng \u0111ang nh\u1eafm v\u00e0o doanh nghi\u1ec7p.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"Moi-quan-he-giua-SPF-DKIM-va-DMARC-trong-bao-mat-email\"><\/span>M\u1ed1i quan h\u1ec7 gi\u1eefa SPF, DKIM v\u00e0 DMARC trong b\u1ea3o m\u1eadt email<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>\u0110\u1ec3 th\u1ef1c s\u1ef1 hi\u1ec3u s\u00e2u <strong>DMARC l\u00e0 g\u00ec<\/strong>, ch\u00fang ta kh\u00f4ng th\u1ec3 t\u00e1ch r\u1eddi n\u00f3 kh\u1ecfi hai ng\u01b0\u1eddi anh em ti\u1ec1n nhi\u1ec7m l\u00e0 SPF v\u00e0 DKIM. Trong th\u1ebf gi\u1edbi b\u1ea3o m\u1eadt email, ba giao th\u1ee9c n\u00e0y t\u1ea1o th\u00e0nh th\u1ebf &#8220;ki\u1ec1ng ba ch\u00e2n&#8221; v\u1eefng ch\u1eafc. DMARC kh\u00f4ng ho\u1ea1t \u0111\u1ed9ng \u0111\u1ed9c l\u1eadp; giao th\u1ee9c n\u00e0y d\u1ef1a ho\u00e0n to\u00e0n v\u00e0o k\u1ebft qu\u1ea3 ki\u1ec3m tra c\u1ee7a SPF v\u00e0 DKIM \u0111\u1ec3 \u0111\u01b0a ra quy\u1ebft \u0111\u1ecbnh.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"SPF-Sender-Policy-Framework-la-gi\"><\/span>SPF (Sender Policy Framework) l\u00e0 g\u00ec?<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>H\u00e3y h\u00ecnh dung SPF gi\u1ed1ng nh\u01b0 m\u1ed9t b\u1ea3n danh s\u00e1ch kh\u00e1ch m\u1eddi t\u1ea1i b\u1eefa ti\u1ec7c. Ch\u1ee7 nh\u00e0 (doanh nghi\u1ec7p) s\u1ebd l\u1eadp ra m\u1ed9t danh s\u00e1ch c\u00e1c \u0111\u1ecba ch\u1ec9 IP (m\u00e1y ch\u1ee7) \u0111\u01b0\u1ee3c ph\u00e9p g\u1eedi email thay m\u1eb7t cho t\u00ean mi\u1ec1n c\u1ee7a m\u00ecnh.<\/p>\n<p>Khi m\u1ed9t email \u0111\u1ebfn, m\u00e1y ch\u1ee7 nh\u1eadn s\u1ebd ki\u1ec3m tra xem \u0111\u1ecba ch\u1ec9 IP c\u1ee7a ng\u01b0\u1eddi g\u1eedi c\u00f3 n\u1eb1m trong &#8220;danh s\u00e1ch kh\u00e1ch m\u1eddi&#8221; (b\u1ea3n ghi SPF tr\u00ean DNS) hay kh\u00f4ng. N\u1ebfu c\u00f3, email \u0111\u01b0\u1ee3c coi l\u00e0 h\u1ee3p l\u1ec7 v\u1ec1 m\u1eb7t ngu\u1ed3n g\u1ed1c IP. Tuy nhi\u00ean, SPF c\u00f3 \u0111i\u1ec3m y\u1ebfu l\u00e0 n\u00f3 ch\u1ec9 ki\u1ec3m tra b\u00ec th\u01b0 (\u0111\u1ecba ch\u1ec9 IP) ch\u1ee9 kh\u00f4ng ki\u1ec3m tra n\u1ed9i dung b\u00ean trong, v\u00e0 danh s\u00e1ch n\u00e0y v\u1eabn c\u00f3 th\u1ec3 b\u1ecb l\u00e0m gi\u1ea3 n\u1ebfu k\u1ebb t\u1ea5n c\u00f4ng c\u00f9ng s\u1eed d\u1ee5ng chung m\u1ed9t nh\u00e0 cung c\u1ea5p d\u1ecbch v\u1ee5 email.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"DKIM-DomainKeys-Identified-Mail-la-gi\"><\/span>DKIM (DomainKeys Identified Mail) l\u00e0 g\u00ec?<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>N\u1ebfu SPF l\u00e0 danh s\u00e1ch kh\u00e1ch m\u1eddi, th\u00ec DKIM ch\u00ednh l\u00e0 con d\u1ea5u ni\u00eam phong tr\u00ean b\u1ee9c th\u01b0. DKIM s\u1eed d\u1ee5ng c\u00f4ng ngh\u1ec7 m\u00e3 h\u00f3a c\u1eb7p kh\u00f3a (Public\/Private Key) \u0111\u1ec3 t\u1ea1o ra m\u1ed9t ch\u1eef k\u00fd s\u1ed1 g\u1eafn v\u00e0o ti\u00eau \u0111\u1ec1 (<a href=\"https:\/\/interdata.vn\/blog\/header-la-gi\/\">Header<\/a>) c\u1ee7a m\u1ed7i email g\u1eedi \u0111i.<\/p>\n<p>M\u00e1y ch\u1ee7 nh\u1eadn s\u1ebd d\u00f9ng kh\u00f3a c\u00f4ng khai (\u0111\u01b0\u1ee3c c\u00f4ng b\u1ed1 tr\u00ean DNS) \u0111\u1ec3 m\u1edf con d\u1ea5u n\u00e0y. N\u1ebfu m\u1edf \u0111\u01b0\u1ee3c v\u00e0 n\u1ed9i dung b\u00ean trong kh\u1edbp, ch\u1ee9ng t\u1ecf email n\u00e0y th\u1ef1c s\u1ef1 \u0111\u1ebfn t\u1eeb doanh nghi\u1ec7p c\u1ee7a b\u1ea1n v\u00e0 n\u1ed9i dung ch\u01b0a h\u1ec1 b\u1ecb s\u1eeda \u0111\u1ed5i tr\u00ean \u0111\u01b0\u1eddng truy\u1ec1n. DKIM gi\u1ea3i quy\u1ebft v\u1ea5n \u0111\u1ec1 x\u00e1c th\u1ef1c n\u1ed9i dung m\u00e0 SPF c\u00f2n thi\u1ebfu s\u00f3t.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Vai-tro-cua-DMARC-trong-moi-quan-he-nay\"><\/span>Vai tr\u00f2 c\u1ee7a DMARC trong m\u1ed1i quan h\u1ec7 n\u00e0y<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>V\u1eady n\u1ebfu \u0111\u00e3 c\u00f3 SPF v\u00e0 DKIM, t\u1ea1i sao ch\u00fang ta v\u1eabn c\u1ea7n h\u1ecfi <strong>DMARC l\u00e0 g\u00ec<\/strong>? V\u1ea5n \u0111\u1ec1 n\u1eb1m \u1edf ch\u1ed7: SPF v\u00e0 DKIM ho\u1ea1t \u0111\u1ed9ng \u0111\u1ed9c l\u1eadp v\u00e0 kh\u00f4ng ch\u1ec9 d\u1eabn cho m\u00e1y ch\u1ee7 nh\u1eadn ph\u1ea3i l\u00e0m g\u00ec khi qu\u00e1 tr\u00ecnh x\u00e1c th\u1ef1c th\u1ea5t b\u1ea1i.<\/p>\n<p>DMARC ch\u00ednh l\u00e0 m\u1ea3nh gh\u00e9p li\u00ean k\u1ebft hai giao th\u1ee9c tr\u00ean. DMARC s\u1eed d\u1ee5ng k\u1ebft qu\u1ea3 c\u1ee7a SPF v\u00e0 DKIM \u0111\u1ec3 x\u00e1c \u0111\u1ecbnh t\u00ednh h\u1ee3p l\u1ec7 c\u1ee7a email. M\u1ed9t email \u0111\u01b0\u1ee3c coi l\u00e0 \u0111\u1ea1t chu\u1ea9n DMARC (DMARC Pass) khi n\u00f3 th\u1ecfa m\u00e3n m\u1ed9t trong hai \u0111i\u1ec1u ki\u1ec7n:<\/p>\n<ol>\n<li>V\u01b0\u1ee3t qua ki\u1ec3m tra SPF V\u00c0 \u0111\u1ecba ch\u1ec9 g\u1eedi kh\u1edbp v\u1edbi t\u00ean mi\u1ec1n (SPF Alignment).<\/li>\n<li>V\u01b0\u1ee3t qua ki\u1ec3m tra DKIM V\u00c0 ch\u1eef k\u00fd kh\u1edbp v\u1edbi t\u00ean mi\u1ec1n (DKIM Alignment).<\/li>\n<\/ol>\n<p>N\u1ebfu c\u1ea3 hai \u0111i\u1ec1u ki\u1ec7n tr\u00ean \u0111\u1ec1u th\u1ea5t b\u1ea1i, giao th\u1ee9c DMARC s\u1ebd k\u00edch ho\u1ea1t ch\u00ednh s\u00e1ch th\u1ef1c thi (Policy) \u0111\u1ec3 x\u1eed l\u00fd email \u0111\u00f3. Ch\u00ednh s\u1ef1 ph\u1ed1i h\u1ee3p ch\u1eb7t ch\u1ebd n\u00e0y l\u00e0m n\u00ean s\u1ee9c m\u1ea1nh c\u1ee7a h\u1ec7 th\u1ed1ng b\u1ea3o m\u1eadt email hi\u1ec7n \u0111\u1ea1i.<\/p>\n<article>\n<div>\n<div>\n<h2><span class=\"ez-toc-section\" id=\"DMARC-giup-han-che-nhung-hinh-thuc-tan-cong-Email-nao\"><\/span>DMARC gi\u00fap h\u1ea1n ch\u1ebf nh\u1eefng h\u00ecnh th\u1ee9c t\u1ea5n c\u00f4ng Email n\u00e0o?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>DMARC c\u00f3 kh\u1ea3 n\u0103ng gi\u1ea3m thi\u1ec3u nhi\u1ec1u h\u00ecnh th\u1ee9c <strong>t\u1ea5n c\u00f4ng gi\u1ea3 m\u1ea1o Email<\/strong>, \u0111\u1eb7c bi\u1ec7t l\u00e0 c\u00e1c k\u1ecbch b\u1ea3n t\u1ea5n c\u00f4ng c\u00f3 ch\u1ee7 \u0111\u00edch v\u1edbi m\u1ee9c \u0111\u1ed9 tinh vi cao. Nh\u1eefng lo\u1ea1i t\u1ea5n c\u00f4ng ph\u1ed5 bi\u1ebfn m\u00e0 DMARC h\u1ed7 tr\u1ee3 h\u1ea1n ch\u1ebf bao g\u1ed3m:<\/p>\n<p><strong>Header Spoofing:<\/strong><\/p>\n<p>\u1ede h\u00ecnh th\u1ee9c n\u00e0y, k\u1ebb t\u1ea5n c\u00f4ng can thi\u1ec7p v\u00e0 thay \u0111\u1ed5i th\u00f4ng tin trong ph\u1ea7n header c\u1ee7a Email, khi\u1ebfn ng\u01b0\u1eddi nh\u1eadn hi\u1ec3u nh\u1ea7m r\u1eb1ng Email \u0111\u01b0\u1ee3c g\u1eedi t\u1eeb m\u1ed9t ngu\u1ed3n \u0111\u00e1ng tin c\u1eady.<\/p>\n<p><strong>Look-alike Domain Attacks:<\/strong><\/p>\n<p>K\u1ebb t\u1ea5n c\u00f4ng s\u1eed d\u1ee5ng nh\u1eefng t\u00ean mi\u1ec1n c\u00f3 h\u00ecnh th\u1ee9c g\u1ea7n gi\u1ed1ng v\u1edbi t\u00ean mi\u1ec1n th\u1eadt nh\u1eb1m \u0111\u00e1nh l\u1eeba ng\u01b0\u1eddi nh\u1eadn, v\u00ed d\u1ee5 thay th\u1ebf ch\u1eef c\u00e1i \u201ci\u201d b\u1eb1ng \u201cl\u201d, khi\u1ebfn s\u1ef1 kh\u00e1c bi\u1ec7t tr\u1edf n\u00ean kh\u00f3 nh\u1eadn bi\u1ebft.<\/p>\n<p><strong>Account Takeover:<\/strong><\/p>\n<p>Trong tr\u01b0\u1eddng h\u1ee3p n\u00e0y, k\u1ebb t\u1ea5n c\u00f4ng chi\u1ebfm quy\u1ec1n truy c\u1eadp v\u00e0o t\u00e0i kho\u1ea3n Email c\u1ee7a ng\u01b0\u1eddi d\u00f9ng v\u00e0 s\u1eed d\u1ee5ng ch\u00ednh t\u00e0i kho\u1ea3n \u0111\u00f3 \u0111\u1ec3 g\u1eedi Email gi\u1ea3 m\u1ea1o \u0111\u1ebfn kh\u00e1ch h\u00e0ng ho\u1eb7c \u0111\u1ed1i t\u00e1c, l\u00e0m t\u0103ng nguy c\u01a1 r\u00f2 r\u1ec9 c\u00e1c th\u00f4ng tin quan tr\u1ecdng.<\/p>\n<p>Nh\u1eefng h\u00ecnh th\u1ee9c t\u1ea5n c\u00f4ng tr\u00ean kh\u00f4ng ch\u1ec9 g\u00e2y t\u1ed5n th\u1ea5t v\u1ec1 m\u1eb7t t\u00e0i ch\u00ednh m\u00e0 c\u00f2n \u1ea3nh h\u01b0\u1edfng nghi\u00eam tr\u1ecdng \u0111\u1ebfn uy t\u00edn v\u00e0 h\u00ecnh \u1ea3nh c\u1ee7a doanh nghi\u1ec7p. DMARC g\u00f3p ph\u1ea7n h\u1ea1n ch\u1ebf c\u00e1c r\u1ee7i ro n\u00e0y b\u1eb1ng c\u00e1ch <strong>x\u00e1c th\u1ef1c ngu\u1ed3n g\u1eedi Email<\/strong> v\u00e0 <strong>b\u1ea3o v\u1ec7 t\u00ean mi\u1ec1n c\u1ee7a t\u1ed5 ch\u1ee9c<\/strong> kh\u1ecfi vi\u1ec7c b\u1ecb l\u1ee3i d\u1ee5ng.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"DMARC-khac-gi-so-voi-SPF-va-DKIM-trong-bao-mat-Email\"><\/span>DMARC kh\u00e1c g\u00ec so v\u1edbi SPF v\u00e0 DKIM trong b\u1ea3o m\u1eadt Email?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>Trong h\u1ec7 th\u1ed1ng b\u1ea3o m\u1eadt Email, DMARC kh\u00f4ng ho\u1ea1t \u0111\u1ed9ng \u0111\u1ed9c l\u1eadp m\u00e0 \u0111\u01b0\u1ee3c tri\u1ec3n khai song song v\u1edbi c\u00e1c giao th\u1ee9c nh\u01b0 <strong>SPF<\/strong> v\u00e0 <strong>DKIM<\/strong> \u0111\u1ec3 t\u1ea1o n\u00ean m\u1ed9t c\u01a1 ch\u1ebf b\u1ea3o v\u1ec7 to\u00e0n di\u1ec7n. SPF c\u00f3 nhi\u1ec7m v\u1ee5 ki\u1ec3m tra xem Email c\u00f3 \u0111\u01b0\u1ee3c g\u1eedi t\u1eeb \u0111\u1ecba ch\u1ec9 IP \u0111\u00e3 \u0111\u01b0\u1ee3c t\u00ean mi\u1ec1n cho ph\u00e9p hay kh\u00f4ng, trong khi DKIM \u0111\u1ea3m b\u1ea3o r\u1eb1ng n\u1ed9i dung Email kh\u00f4ng b\u1ecb ch\u1ec9nh s\u1eeda trong qu\u00e1 tr\u00ecnh truy\u1ec1n t\u1ea3i.<\/p>\n<p>DMARC gi\u1eef vai tr\u00f2 nh\u01b0 <strong>l\u1edbp ki\u1ec3m so\u00e1t cu\u1ed1i c\u00f9ng<\/strong>, t\u1eadn d\u1ee5ng k\u1ebft qu\u1ea3 x\u00e1c th\u1ef1c t\u1eeb SPF v\u00e0 DKIM \u0111\u1ec3 quy\u1ebft \u0111\u1ecbnh li\u1ec7u Email s\u1ebd \u0111\u01b0\u1ee3c ch\u1ea5p nh\u1eadn hay b\u1ecb t\u1eeb ch\u1ed1i. B\u00ean c\u1ea1nh \u0111\u00f3, DMARC c\u00f2n cung c\u1ea5p c\u00e1c b\u00e1o c\u00e1o chi ti\u1ebft v\u1ec1 t\u00ecnh tr\u1ea1ng g\u1eedi Email, gi\u00fap t\u1ed5 ch\u1ee9c \u0111\u00e1nh gi\u00e1 m\u1ee9c \u0111\u1ed9 r\u1ee7i ro v\u00e0 \u0111i\u1ec1u ch\u1ec9nh ch\u00ednh s\u00e1ch b\u1ea3o m\u1eadt cho ph\u00f9 h\u1ee3p.<\/p>\n<p>Theo b\u00e1o c\u00e1o c\u1ee7a Valimail, vi\u1ec7c k\u1ebft h\u1ee3p SPF, DKIM v\u00e0 DMARC c\u00f3 th\u1ec3 l\u00e0m gi\u1ea3m \u0111\u00e1ng k\u1ec3 nguy c\u01a1 b\u1ecb gi\u1ea3 m\u1ea1o Email. C\u1ee5 th\u1ec3, c\u00e1c t\u00ean mi\u1ec1n \u00e1p d\u1ee5ng \u0111\u1ea7y \u0111\u1ee7 ch\u00ednh s\u00e1ch DMARC c\u00f3 th\u1ec3 gi\u1ea3m g\u1ea7n <strong>b\u1ed1n l\u1ea7n<\/strong> s\u1ed1 l\u01b0\u1ee3ng Email gi\u1ea3 m\u1ea1o so v\u1edbi nh\u1eefng t\u00ean mi\u1ec1n ch\u01b0a tri\u1ec3n khai. \u0110i\u1ec1u n\u00e0y cho th\u1ea5y vi\u1ec7c tri\u1ec3n khai \u0111\u1ed3ng th\u1eddi c\u00e1c giao th\u1ee9c b\u1ea3o m\u1eadt Email l\u00e0 y\u1ebfu t\u1ed1 quan tr\u1ecdng \u0111\u1ec3 b\u1ea3o v\u1ec7 h\u1ec7 th\u1ed1ng Email doanh nghi\u1ec7p tr\u01b0\u1edbc c\u00e1c h\u00ecnh th\u1ee9c t\u1ea5n c\u00f4ng v\u00e0 l\u1eeba \u0111\u1ea3o ng\u00e0y c\u00e0ng ph\u1ee9c t\u1ea1p.<\/p>\n<\/div>\n<\/div>\n<\/article>\n<h2><span class=\"ez-toc-section\" id=\"Khi-nao-doanh-nghiep-nen-trien-khai-DMARC\"><\/span>Khi n\u00e0o doanh nghi\u1ec7p n\u00ean tri\u1ec3n khai DMARC?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>C\u00e2u h\u1ecfi \u0111\u1eb7t ra kh\u00f4ng ph\u1ea3i l\u00e0 &#8220;c\u00f3 n\u00ean hay kh\u00f4ng&#8221; m\u00e0 l\u00e0 &#8220;khi n\u00e0o&#8221;. V\u1edbi t\u01b0 c\u00e1ch l\u00e0 \u0111\u01a1n v\u1ecb cung c\u1ea5p gi\u1ea3i ph\u00e1p h\u1ea1 t\u1ea7ng m\u1ea1ng, <strong>InterData<\/strong> khuy\u00ean b\u1ea1n n\u00ean xem x\u00e9t tri\u1ec3n khai giao th\u1ee9c DMARC trong c\u00e1c tr\u01b0\u1eddng h\u1ee3p sau:<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Khi-ban-su-dung-email-theo-ten-mien-rieng\"><\/span>Khi b\u1ea1n s\u1eed d\u1ee5ng email theo t\u00ean mi\u1ec1n ri\u00eang<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>Ngay khi b\u1ea1n \u0111\u0103ng k\u00fd m\u1ed9t t\u00ean mi\u1ec1n doanh nghi\u1ec7p v\u00e0 b\u1eaft \u0111\u1ea7u t\u1ea1o c\u00e1c \u0111\u1ecba ch\u1ec9 email nh\u01b0 nguyenvana@tencongty.com, b\u1ea1n \u0111\u00e3 c\u1ea7n ngh\u0129 \u0111\u1ebfn DMARC. \u0110\u1eebng \u0111\u1ee3i \u0111\u1ebfn khi b\u1ecb gi\u1ea3 m\u1ea1o m\u1edbi b\u1eaft \u0111\u1ea7u t\u00ecm hi\u1ec3u <strong>DMARC l\u00e0 g\u00ec<\/strong>. Ph\u00f2ng b\u1ec7nh lu\u00f4n t\u1ed1t h\u01a1n ch\u1eefa b\u1ec7nh. Vi\u1ec7c c\u00e0i \u0111\u1eb7t s\u1edbm \u1edf ch\u1ebf \u0111\u1ed9 p=none gi\u00fap b\u1ea1n x\u00e2y d\u1ef1ng \u0111\u1ed9 uy t\u00edn cho t\u00ean mi\u1ec1n ngay t\u1eeb nh\u1eefng ng\u00e0y \u0111\u1ea7u (Domain Warming up).<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Khi-ban-thuc-hien-cac-chien-dich-Email-Marketing\"><\/span>Khi b\u1ea1n th\u1ef1c hi\u1ec7n c\u00e1c chi\u1ebfn d\u1ecbch Email Marketing<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>N\u1ebfu doanh nghi\u1ec7p th\u01b0\u1eddng xuy\u00ean g\u1eedi newsletter, email khuy\u1ebfn m\u00e3i hay th\u00f4ng b\u00e1o \u0111\u01a1n h\u00e0ng v\u1edbi s\u1ed1 l\u01b0\u1ee3ng l\u1edbn, DMARC l\u00e0 b\u1eaft bu\u1ed9c. Nh\u01b0 \u0111\u00e3 \u0111\u1ec1 c\u1eadp, Google v\u00e0 Yahoo hi\u1ec7n nay ki\u1ec3m so\u00e1t r\u1ea5t g\u1eaft gao c\u00e1c t\u00ean mi\u1ec1n g\u1eedi s\u1ed1 l\u01b0\u1ee3ng l\u1edbn (Bulk senders). Thi\u1ebfu DMARC \u0111\u1ed3ng ngh\u0129a v\u1edbi vi\u1ec7c b\u1ea1n \u0111ang n\u00e9m ti\u1ec1n qua c\u1eeda s\u1ed5 v\u00ec email g\u1eedi \u0111i kh\u00f4ng ti\u1ebfp c\u1eadn \u0111\u01b0\u1ee3c kh\u00e1ch h\u00e0ng.<\/p>\n<figure id=\"attachment_37906\" aria-describedby=\"caption-attachment-37906\" style=\"width: 800px\" class=\"wp-caption aligncenter\"><img loading=\"lazy\" decoding=\"async\" class=\"size-full wp-image-37906\" src=\"https:\/\/interdata.vn\/blog\/wp-content\/uploads\/2026\/01\/Khi-nao-doanh-nghiep-nen-trien-khai-DMARC.jpg\" alt=\"Khi n\u00e0o doanh nghi\u1ec7p n\u00ean tri\u1ec3n khai DMARC\" width=\"800\" height=\"500\" title=\"\" srcset=\"https:\/\/interdata.vn\/blog\/wp-content\/uploads\/2026\/01\/Khi-nao-doanh-nghiep-nen-trien-khai-DMARC.jpg 800w, https:\/\/interdata.vn\/blog\/wp-content\/uploads\/2026\/01\/Khi-nao-doanh-nghiep-nen-trien-khai-DMARC-300x188.jpg 300w, https:\/\/interdata.vn\/blog\/wp-content\/uploads\/2026\/01\/Khi-nao-doanh-nghiep-nen-trien-khai-DMARC-768x480.jpg 768w\" sizes=\"auto, (max-width: 800px) 100vw, 800px\" \/><figcaption id=\"caption-attachment-37906\" class=\"wp-caption-text\">Khi n\u00e0o doanh nghi\u1ec7p n\u00ean tri\u1ec3n khai DMARC?<\/figcaption><\/figure>\n<h3><span class=\"ez-toc-section\" id=\"Khi-doanh-nghiep-gap-van-de-ve-Spam-hoac-Gia-mao\"><\/span>Khi doanh nghi\u1ec7p g\u1eb7p v\u1ea5n \u0111\u1ec1 v\u1ec1 Spam ho\u1eb7c Gi\u1ea3 m\u1ea1o<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>D\u1ea5u hi\u1ec7u r\u00f5 nh\u1ea5t l\u00e0 khi kh\u00e1ch h\u00e0ng ph\u00e0n n\u00e0n r\u1eb1ng h\u1ecd nh\u1eadn \u0111\u01b0\u1ee3c email l\u1ea1 t\u1eeb b\u1ea1n, ho\u1eb7c \u0111\u1ed1i t\u00e1c th\u00f4ng b\u00e1o email c\u1ee7a b\u1ea1n lu\u00f4n n\u1eb1m trong m\u1ee5c Spam. \u0110\u00e2y l\u00e0 l\u00fac b\u00e1o \u0111\u1ed9ng \u0111\u1ecf. B\u1ea1n c\u1ea7n tri\u1ec3n khai DMARC ngay l\u1eadp t\u1ee9c, k\u1ebft h\u1ee3p v\u1edbi r\u00e0 so\u00e1t l\u1ea1i SPF v\u00e0 DKIM \u0111\u1ec3 l\u00e0m s\u1ea1ch lu\u1ed3ng email c\u1ee7a m\u00ecnh.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Khi-ban-thuoc-cac-nganh-nhay-cam-ve-du-lieu\"><\/span>Khi b\u1ea1n thu\u1ed9c c\u00e1c ng\u00e0nh nh\u1ea1y c\u1ea3m v\u1ec1 d\u1eef li\u1ec7u<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>C\u00e1c l\u0129nh v\u1ef1c nh\u01b0 T\u00e0i ch\u00ednh &#8211; Ng\u00e2n h\u00e0ng, Y t\u1ebf, Lu\u1eadt, Th\u01b0\u01a1ng m\u1ea1i \u0111i\u1ec7n t\u1eed&#8230; lu\u00f4n l\u00e0 \u0111\u00edch ng\u1eafm c\u1ee7a t\u1ed9i ph\u1ea1m m\u1ea1ng. Vi\u1ec7c tri\u1ec3n khai DMARC \u1edf m\u1ee9c \u0111\u1ed9 p=reject kh\u00f4ng ch\u1ec9 l\u00e0 v\u1ea5n \u0111\u1ec1 k\u1ef9 thu\u1eadt m\u00e0 c\u00f2n l\u00e0 ti\u00eau chu\u1ea9n tu\u00e2n th\u1ee7 (Compliance) \u0111\u1ec3 b\u1ea3o v\u1ec7 d\u1eef li\u1ec7u kh\u00e1ch h\u00e0ng v\u00e0 tr\u00e1nh c\u00e1c r\u1eafc r\u1ed1i ph\u00e1p l\u00fd.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"Cach-tao-DMARC-Record-dung-chuan-han-che-rui-ro\"><\/span>C\u00e1ch t\u1ea1o DMARC Record \u0111\u00fang chu\u1ea9n, h\u1ea1n ch\u1ebf r\u1ee7i ro<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<h3><span class=\"ez-toc-section\" id=\"DMARC-Record-la-gi\"><\/span>DMARC Record l\u00e0 g\u00ec?<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>DMARC Record (hay b\u1ea3n ghi DMARC) l\u00e0 m\u1ed9t b\u01b0\u1edbc c\u1ea5u h\u00ecnh quan tr\u1ecdng v\u00e0 \u0111\u00f2i h\u1ecfi \u0111\u1ed9 ch\u00ednh x\u00e1c cao. B\u1ea1n c\u00f3 th\u1ec3 hi\u1ec3u \u0111\u01a1n gi\u1ea3n, \u0111\u00e2y l\u00e0 vi\u1ec7c thi\u1ebft l\u1eadp m\u1ed9t <strong>ch\u00ednh s\u00e1ch ki\u1ec3m so\u00e1t v\u00e0 l\u1ecdc email<\/strong> g\u1eedi t\u1eeb domain c\u1ee7a m\u00ecnh.<\/p>\n<p>N\u1ebfu ch\u00ednh s\u00e1ch n\u00e0y \u0111\u01b0\u1ee3c c\u1ea5u h\u00ecnh kh\u00f4ng \u0111\u00fang, h\u1ec7 th\u1ed1ng c\u00f3 th\u1ec3 <strong>ch\u1eb7n nh\u1ea7m email h\u1ee3p l\u1ec7<\/strong> ho\u1eb7c <strong>b\u1ecf l\u1ecdt c\u00e1c email kh\u00f4ng h\u1ee3p l\u1ec7<\/strong>. V\u00ec v\u1eady, qu\u00e1 tr\u00ecnh t\u1ea1o DMARC Record c\u1ea7n \u0111\u01b0\u1ee3c th\u1ef1c hi\u1ec7n c\u1ea9n tr\u1ecdng theo t\u1eebng b\u01b0\u1edbc \u0111\u1ec3 h\u1ea1n ch\u1ebf t\u1ed1i \u0111a sai s\u00f3t.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Buoc-1-Tao-ban-ghi-DMARC-trong-DNS\"><\/span>B\u01b0\u1edbc 1: T\u1ea1o b\u1ea3n ghi DMARC trong DNS<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>Tr\u01b0\u1edbc ti\u00ean, b\u1ea1n c\u1ea7n t\u1ea1o m\u1ed9t b\u1ea3n ghi DMARC v\u1edbi c\u1ea5u tr\u00fac nh\u01b0 sau:<\/p>\n<pre>_dmarc.domain.com TXT v=DMARC1\\; p=none\\; pct=100\\; rua=mailto:dmarc-reports@domain.com\\;<\/pre>\n<p>So v\u1edbi c\u00e1c b\u1ea3n ghi DMARC \u1edf ch\u1ebf \u0111\u1ed9 ch\u1eb7n, gi\u00e1 tr\u1ecb <strong><code>p=none<\/code><\/strong> trong v\u00ed d\u1ee5 tr\u00ean \u0111\u1ea1i di\u1ec7n cho <strong>ch\u1ebf \u0111\u1ed9 ki\u1ec3m tra (test mode)<\/strong>. \u1ede ch\u1ebf \u0111\u1ed9 n\u00e0y, mail server ph\u00eda nh\u1eadn v\u1eabn ki\u1ec3m tra t\u1eebng email g\u1eedi \u0111\u1ebfn nh\u01b0ng <strong>ch\u1ec9 g\u1eedi b\u00e1o c\u00e1o<\/strong>, kh\u00f4ng \u00e1p d\u1ee5ng b\u1ea5t k\u1ef3 h\u00e0nh \u0111\u1ed9ng x\u1eed l\u00fd n\u00e0o.<\/p>\n<p>C\u00e1ch l\u00e0m n\u00e0y cho ph\u00e9p b\u1ea1n <strong>thu th\u1eadp d\u1eef li\u1ec7u v\u1ec1 c\u00e1c mail server \u0111ang g\u1eedi email<\/strong> d\u01b0\u1edbi danh ngh\u0129a domain tr\u01b0\u1edbc khi \u0111\u01b0a ra ch\u00ednh s\u00e1ch x\u1eed l\u00fd ph\u00f9 h\u1ee3p h\u01a1n.<\/p>\n<p>M\u1ed9t trong nh\u1eefng c\u00f4ng c\u1ee5 h\u1ed7 tr\u1ee3 thu th\u1eadp v\u00e0 t\u1ed5ng h\u1ee3p d\u1eef li\u1ec7u DMARC l\u00e0: <strong><a href=\"http:\/\/dmarc.postmarkapp.com\/\" rel=\"nofollow noopener\" target=\"_blank\">http:\/\/dmarc.postmarkapp.com\/<\/a><\/strong><\/p>\n<h3><span class=\"ez-toc-section\" id=\"Buoc-2-Phan-tich-bao-cao-DMARC-DMARC-Report\"><\/span>B\u01b0\u1edbc 2: Ph\u00e2n t\u00edch b\u00e1o c\u00e1o DMARC (DMARC Report)<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>DMARC Report l\u00e0 b\u1ea3ng b\u00e1o c\u00e1o t\u1ed5ng h\u1ee3p c\u00e1c th\u00f4ng tin thu th\u1eadp \u0111\u01b0\u1ee3c t\u1eeb qu\u00e1 tr\u00ecnh ki\u1ec3m tra email, qua \u0111\u00f3 x\u00e1c \u0111\u1ecbnh tr\u1ea1ng th\u00e1i <strong>pass<\/strong> hay <strong>fail<\/strong>.<\/p>\n<figure id=\"attachment_37903\" aria-describedby=\"caption-attachment-37903\" style=\"width: 610px\" class=\"wp-caption aligncenter\"><img loading=\"lazy\" decoding=\"async\" class=\"size-full wp-image-37903\" src=\"https:\/\/interdata.vn\/blog\/wp-content\/uploads\/2026\/01\/Phan-tich-DMARC-report.png\" alt=\"Ph\u00e2n t\u00edch DMARC report\" width=\"610\" height=\"885\" title=\"\" srcset=\"https:\/\/interdata.vn\/blog\/wp-content\/uploads\/2026\/01\/Phan-tich-DMARC-report.png 610w, https:\/\/interdata.vn\/blog\/wp-content\/uploads\/2026\/01\/Phan-tich-DMARC-report-207x300.png 207w\" sizes=\"auto, (max-width: 610px) 100vw, 610px\" \/><figcaption id=\"caption-attachment-37903\" class=\"wp-caption-text\">Ph\u00e2n t\u00edch DMARC report<\/figcaption><\/figure>\n<p>Trong b\u00e1o c\u00e1o n\u00e0y, c\u00f3 ba ch\u1ec9 s\u1ed1 quan tr\u1ecdng c\u1ea7n theo d\u00f5i:<\/p>\n<ul>\n<li><strong>Processed<\/strong>: T\u1ed5ng s\u1ed1 email \u0111\u00e3 \u0111\u01b0\u1ee3c ghi nh\u1eadn v\u00e0 b\u00e1o c\u00e1o<\/li>\n<li><strong>Fully Aligned<\/strong>: S\u1ed1 email v\u01b0\u1ee3t qua x\u00e1c th\u1ef1c c\u1ea3 SPF v\u00e0 DKIM<\/li>\n<li><strong>Failed<\/strong>: S\u1ed1 email kh\u00f4ng \u0111\u1ea1t SPF ho\u1eb7c DKIM<\/li>\n<\/ul>\n<p>Ti\u1ebfp theo, b\u1ea1n c\u1ea7n ch\u00fa \u00fd \u0111\u1ebfn hai nh\u00f3m ngu\u1ed3n g\u1eedi:<\/p>\n<ul>\n<li><strong>Trusted sources<\/strong>: C\u00e1c mail server (domain v\u00e0 IP) \u0111\u00e3 v\u01b0\u1ee3t qua c\u1ea3 SPF v\u00e0 DKIM<\/li>\n<li><strong>Unknown\/Threats<\/strong>: C\u00e1c mail server kh\u00f4ng \u0111\u1ea1t SPF ho\u1eb7c DKIM<\/li>\n<\/ul>\n<p>Trong nhi\u1ec1u tr\u01b0\u1eddng h\u1ee3p, nh\u00f3m <strong>Unknown<\/strong> c\u00f3 th\u1ec3 bao g\u1ed3m nh\u1eefng ngu\u1ed3n g\u1eedi h\u1ee3p l\u1ec7 nh\u01b0ng ch\u01b0a c\u1ea5u h\u00ecnh SPF ho\u1eb7c DKIM. \u0110i\u1ec1u n\u00e0y khi\u1ebfn vi\u1ec7c \u00e1p d\u1ee5ng DMARC tr\u1edf n\u00ean nh\u1ea1y c\u1ea3m v\u00e0 c\u1ea7n \u0111\u01b0\u1ee3c \u0111\u00e1nh gi\u00e1 k\u1ef9 l\u01b0\u1ee1ng.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Buoc-3-Xac-dinh-va-gan-DMARC-cho-cac-nguon-gui-hop-le\"><\/span>B\u01b0\u1edbc 3: X\u00e1c \u0111\u1ecbnh v\u00e0 g\u00e1n DMARC cho c\u00e1c ngu\u1ed3n g\u1eedi h\u1ee3p l\u1ec7<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>Sau khi t\u1ed5ng h\u1ee3p \u0111\u01b0\u1ee3c danh s\u00e1ch c\u00e1c ngu\u1ed3n g\u1eedi h\u1ee3p l\u1ec7, b\u1ea1n c\u1ea7n t\u1ea1o m\u1ed9t danh s\u00e1ch \u0111\u1ed1i chi\u1ebfu v\u00e0 c\u1eadp nh\u1eadt khi ph\u00e1t sinh ngu\u1ed3n m\u1edbi. M\u1ee5c ti\u00eau cu\u1ed1i c\u00f9ng c\u1ee7a DMARC l\u00e0 x\u00e1c minh vi\u1ec7c <strong>email v\u01b0\u1ee3t qua c\u1ea3 SPF v\u00e0 DKIM<\/strong>.<\/p>\n<p>Trong m\u1ed9t s\u1ed1 tr\u01b0\u1eddng h\u1ee3p \u0111\u1eb7c bi\u1ec7t nh\u01b0 <strong>email forwarding<\/strong>, khi Return-path b\u1ecb thay \u0111\u1ed5i khi\u1ebfn SPF kh\u00f4ng \u0111\u1ea1t nh\u01b0ng DKIM v\u1eabn pass, nh\u1eefng email n\u00e0y v\u1eabn c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c xem l\u00e0 h\u1ee3p l\u1ec7 v\u00e0 c\u1ea7n \u0111\u01b0\u1ee3c x\u1eed l\u00fd ph\u00f9 h\u1ee3p.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Buoc-4-Ap-dung-chinh-sach-DMARC-vao-thuc-te\"><\/span>B\u01b0\u1edbc 4: \u00c1p d\u1ee5ng ch\u00ednh s\u00e1ch DMARC v\u00e0o th\u1ef1c t\u1ebf<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>Khi \u0111\u00e3 x\u00e1c \u0111\u1ecbnh r\u00f5 c\u00e1c ngu\u1ed3n g\u1eedi h\u1ee3p l\u1ec7, b\u1ea1n c\u00f3 th\u1ec3 chuy\u1ec3n b\u1ea3n ghi DMARC sang ch\u1ebf \u0111\u1ed9 gi\u00e1m s\u00e1t ch\u1eb7t ch\u1ebd h\u01a1n v\u1edbi <strong><code>p=quarantine<\/code><\/strong>. \u1ede giai \u0111o\u1ea1n n\u00e0y, c\u00e1c email kh\u00f4ng \u0111\u1ea1t x\u00e1c th\u1ef1c s\u1ebd \u0111\u01b0\u1ee3c chuy\u1ec3n v\u00e0o th\u01b0 m\u1ee5c <strong>Spam<\/strong> ho\u1eb7c <strong>Junk<\/strong>.<\/p>\n<p>Cu\u1ed1i c\u00f9ng, b\u1ea3n ghi c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c thi\u1ebft l\u1eadp \u1edf m\u1ee9c nghi\u00eam ng\u1eb7t nh\u1ea5t v\u1edbi <strong><code>p=reject<\/code><\/strong>, nh\u1eb1m <strong>lo\u1ea1i b\u1ecf ho\u00e0n to\u00e0n c\u00e1c email kh\u00f4ng \u0111\u1ea1t x\u00e1c th\u1ef1c<\/strong>, \u0111\u1ea3m b\u1ea3o an to\u00e0n cho h\u1ec7 th\u1ed1ng email c\u1ee7a domain.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"Cac-sai-lam-thuong-gap-khi-trien-khai-DMARC\"><\/span>C\u00e1c sai l\u1ea7m th\u01b0\u1eddng g\u1eb7p khi tri\u1ec3n khai DMARC<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>Trong qu\u00e1 tr\u00ecnh h\u1ed7 tr\u1ee3 kh\u00e1ch h\u00e0ng, ch\u00fang t\u00f4i nh\u1eadn th\u1ea5y nhi\u1ec1u doanh nghi\u1ec7p d\u00f9 \u0111\u00e3 hi\u1ec3u s\u01a1 b\u1ed9 v\u1ec1 giao th\u1ee9c b\u1ea3o m\u1eadt DMARC\u00a0nh\u01b0ng v\u1eabn m\u1eafc l\u1ed7i khi tri\u1ec3n khai th\u1ef1c t\u1ebf. D\u01b0\u1edbi \u0111\u00e2y l\u00e0 nh\u1eefng &#8220;h\u1ed1 s\u00e2u&#8221; b\u1ea1n c\u1ea7n tr\u00e1nh:<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Bat-preject-qua-voi-vang\"><\/span>B\u1eadt p=reject qu\u00e1 v\u1ed9i v\u00e0ng<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>\u0110\u00e2y l\u00e0 sai l\u1ea7m ph\u1ed5 bi\u1ebfn v\u00e0 tai h\u1ea1i nh\u1ea5t. Nhi\u1ec1u qu\u1ea3n tr\u1ecb vi\u00ean v\u00ec qu\u00e1 lo l\u1eafng v\u1ec1 b\u1ea3o m\u1eadt ho\u1eb7c mu\u1ed1n &#8220;l\u00e0m cho xong&#8221; \u0111\u00e3 thi\u1ebft l\u1eadp ngay p=reject khi v\u1eeba t\u1ea1o b\u1ea3n ghi. H\u1eadu qu\u1ea3 l\u00e0 h\u00e0ng lo\u1ea1t email n\u1ed9i b\u1ed9, email t\u1eeb ph\u1ea7n m\u1ec1m <a href=\"https:\/\/interdata.vn\/blog\/crm-la-gi\/\">CRM<\/a>, email t\u1eeb h\u1ec7 th\u1ed1ng nh\u00e2n s\u1ef1&#8230; b\u1ecb ch\u1eb7n \u0111\u1ee9ng v\u00ec ch\u01b0a k\u1ecbp c\u1ea5u h\u00ecnh SPF\/DKIM \u0111\u1ed3ng b\u1ed9.<\/p>\n<ul>\n<li><strong>L\u1eddi khuy\u00ean:<\/strong> Lu\u00f4n b\u1eaft \u0111\u1ea7u b\u1eb1ng p=none trong \u00edt nh\u1ea5t 2-4 tu\u1ea7n \u0111\u1ec3 thu th\u1eadp d\u1eef li\u1ec7u.<\/li>\n<\/ul>\n<h3><span class=\"ez-toc-section\" id=\"Khong-cau-hinh-hoac-cau-hinh-sai-SPFDKIM-truoc\"><\/span>Kh\u00f4ng c\u1ea5u h\u00ecnh ho\u1eb7c c\u1ea5u h\u00ecnh sai SPF\/DKIM tr\u01b0\u1edbc<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>DMARC d\u1ef1a tr\u00ean SPF v\u00e0 DKIM. N\u1ebfu hai n\u1ec1n t\u1ea3ng n\u00e0y ch\u01b0a v\u1eefng, DMARC s\u1ebd kh\u00f4ng th\u1ec3 ho\u1ea1t \u0111\u1ed9ng hi\u1ec7u qu\u1ea3. M\u1ed9t l\u1ed7i th\u01b0\u1eddng g\u1eb7p l\u00e0 b\u1ea3n ghi SPF v\u01b0\u1ee3t qu\u00e1 gi\u1edbi h\u1ea1n 10 l\u1ea7n tra c\u1ee9u DNS (DNS lookup limit), khi\u1ebfn k\u1ebft qu\u1ea3 tr\u1ea3 v\u1ec1 b\u1ecb l\u1ed7i (PermError), d\u1eabn \u0111\u1ebfn DMARC c\u0169ng b\u1ecb fail theo.<\/p>\n<figure id=\"attachment_37907\" aria-describedby=\"caption-attachment-37907\" style=\"width: 934px\" class=\"wp-caption aligncenter\"><img loading=\"lazy\" decoding=\"async\" class=\"size-full wp-image-37907\" src=\"https:\/\/interdata.vn\/blog\/wp-content\/uploads\/2026\/01\/Cac-sai-lam-thuong-gap-khi-trien-khai-DMARC.png\" alt=\"C\u00e1c sai l\u1ea7m th\u01b0\u1eddng g\u1eb7p khi tri\u1ec3n khai DMARC\" width=\"934\" height=\"307\" title=\"\" srcset=\"https:\/\/interdata.vn\/blog\/wp-content\/uploads\/2026\/01\/Cac-sai-lam-thuong-gap-khi-trien-khai-DMARC.png 934w, https:\/\/interdata.vn\/blog\/wp-content\/uploads\/2026\/01\/Cac-sai-lam-thuong-gap-khi-trien-khai-DMARC-300x99.png 300w, https:\/\/interdata.vn\/blog\/wp-content\/uploads\/2026\/01\/Cac-sai-lam-thuong-gap-khi-trien-khai-DMARC-768x252.png 768w\" sizes=\"auto, (max-width: 934px) 100vw, 934px\" \/><figcaption id=\"caption-attachment-37907\" class=\"wp-caption-text\">C\u00e1c sai l\u1ea7m th\u01b0\u1eddng g\u1eb7p khi tri\u1ec3n khai DMARC<\/figcaption><\/figure>\n<h3><span class=\"ez-toc-section\" id=\"Quen-thiet-lap-dia-chi-nhan-bao-cao-rua\"><\/span>Qu\u00ean thi\u1ebft l\u1eadp \u0111\u1ecba ch\u1ec9 nh\u1eadn b\u00e1o c\u00e1o (rua)<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>Th\u1ebb rua trong b\u1ea3n ghi DMARC d\u00f9ng \u0111\u1ec3 khai b\u00e1o \u0111\u1ecba ch\u1ec9 email nh\u1eadn b\u00e1o c\u00e1o t\u1ed5ng h\u1ee3p. N\u1ebfu b\u1ecf qua th\u1ebb n\u00e0y, b\u1ea1n s\u1ebd kh\u00f4ng nh\u1eadn \u0111\u01b0\u1ee3c b\u1ea5t k\u1ef3 d\u1eef li\u1ec7u n\u00e0o. Khi \u0111\u00f3, vi\u1ec7c tri\u1ec3n khai DMARC tr\u1edf n\u00ean v\u00f4 ngh\u0129a v\u00ec b\u1ea1n kh\u00f4ng bi\u1ebft chuy\u1ec7n g\u00ec \u0111ang x\u1ea3y ra v\u1edbi t\u00ean mi\u1ec1n c\u1ee7a m\u00ecnh (Blind spot).<\/p>\n<ul>\n<li><strong>L\u01b0u \u00fd:<\/strong> N\u00ean t\u1ea1o m\u1ed9t email chuy\u00ean bi\u1ec7t (v\u00ed d\u1ee5: dmarc-report@domain.com) \u0111\u1ec3 nh\u1eadn b\u00e1o c\u00e1o, tr\u00e1nh l\u00e0m ng\u1eadp h\u1ed9p th\u01b0 c\u00e1 nh\u00e2n.<\/li>\n<\/ul>\n<h3><span class=\"ez-toc-section\" id=\"Cau-hinh-sai-cu-phap-trong-DNS\"><\/span>C\u1ea5u h\u00ecnh sai c\u00fa ph\u00e1p trong DNS<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>B\u1ea3n ghi DMARC l\u00e0 m\u1ed9t \u0111o\u1ea1n v\u0103n b\u1ea3n TXT r\u1ea5t nh\u1ea1y c\u1ea3m v\u1edbi t\u1eebng k\u00fd t\u1ef1. M\u1ed9t d\u1ea5u ch\u1ea5m ph\u1ea9y (;) \u0111\u1eb7t sai ch\u1ed7, m\u1ed9t kho\u1ea3ng tr\u1eafng th\u1eeba hay thi\u1ebfu ch\u1eef _dmarc \u1edf ph\u1ea7n Host \u0111\u1ec1u khi\u1ebfn b\u1ea3n ghi kh\u00f4ng c\u00f3 hi\u1ec7u l\u1ef1c.<\/p>\n<ul>\n<li><strong>V\u00ed d\u1ee5 \u0111\u00fang:<\/strong> Host: _dmarc, Value: v=DMARC1; p=none; rua=mailto:admin@domain.com<\/li>\n<\/ul>\n<h2><span class=\"ez-toc-section\" id=\"Ket-luan\"><\/span>K\u1ebft lu\u1eadn<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>Ch\u00fang ta \u0111\u00e3 c\u00f9ng nhau \u0111i qua h\u00e0nh tr\u00ecnh t\u00ecm hi\u1ec3u chi ti\u1ebft <strong>DMARC l\u00e0 g\u00ec<\/strong>, t\u1eeb kh\u00e1i ni\u1ec7m c\u01a1 b\u1ea3n \u0111\u1ebfn c\u00e1c chi\u1ebfn l\u01b0\u1ee3c tri\u1ec3n khai th\u1ef1c t\u1ebf. Nh\u00ecn chung, DMARC kh\u00f4ng c\u00f2n l\u00e0 m\u1ed9t l\u1ef1a ch\u1ecdn xa x\u1ec9 m\u00e0 \u0111\u00e3 tr\u1edf th\u00e0nh ti\u00eau chu\u1ea9n v\u1ec7 sinh an to\u00e0n t\u1ed1i thi\u1ec3u cho h\u1ec7 th\u1ed1ng email doanh nghi\u1ec7p trong k\u1ef7 nguy\u00ean s\u1ed1.<\/p>\n<p>Giao th\u1ee9c n\u00e0y kh\u00f4ng ch\u1ec9 gi\u00fap b\u1ea1n ng\u0103n ch\u1eb7n nh\u1eefng k\u1ebb gi\u1ea3 m\u1ea1o danh t\u00ednh \u0111\u1ec3 l\u1eeba \u0111\u1ea3o m\u00e0 c\u00f2n l\u00e0 ch\u00eca kh\u00f3a \u0111\u1ec3 n\u00e2ng cao t\u1ef7 l\u1ec7 email v\u00e0o Inbox, \u0111\u1ea3m b\u1ea3o th\u00f4ng \u0111i\u1ec7p c\u1ee7a b\u1ea1n lu\u00f4n \u0111\u1ebfn \u0111\u01b0\u1ee3c tay kh\u00e1ch h\u00e0ng. Tuy nhi\u00ean, h\u00e3y nh\u1edb r\u1eb1ng tri\u1ec3n khai DMARC l\u00e0 m\u1ed9t qu\u00e1 tr\u00ecnh c\u1ea7n s\u1ef1 ki\u00ean nh\u1eabn v\u00e0 c\u1ea9n tr\u1ecdng. H\u00e3y b\u1eaft \u0111\u1ea7u t\u1eeb ch\u1ebf \u0111\u1ed9 gi\u00e1m s\u00e1t (p=none), ph\u00e2n t\u00edch k\u1ef9 l\u01b0\u1ee1ng c\u00e1c b\u00e1o c\u00e1o tr\u01b0\u1edbc khi ti\u1ebfn t\u1edbi c\u00e1c bi\u1ec7n ph\u00e1p m\u1ea1nh tay h\u01a1n.<\/p>\n<p>Hy v\u1ecdng b\u00e0i vi\u1ebft n\u00e0y c\u1ee7a <a href=\"https:\/\/interdata.vn\/\"><strong>InterData<\/strong> <\/a>\u0111\u00e3 cung c\u1ea5p cho b\u1ea1n c\u00e1i nh\u00ecn to\u00e0n di\u1ec7n v\u00e0 h\u1eefu \u00edch. N\u1ebfu b\u1ea1n v\u1eabn c\u00f2n b\u0103n kho\u0103n v\u1ec1 c\u00e1ch c\u1ea5u h\u00ecnh ho\u1eb7c g\u1eb7p kh\u00f3 kh\u0103n trong vi\u1ec7c x\u1eed l\u00fd c\u00e1c l\u1ed7i k\u1ef9 thu\u1eadt, \u0111\u1eebng ng\u1ea7n ng\u1ea1i \u0111\u1ec3 l\u1ea1i b\u00ecnh lu\u1eadn ho\u1eb7c li\u00ean h\u1ec7 v\u1edbi \u0111\u1ed9i ng\u0169 k\u1ef9 thu\u1eadt c\u1ee7a ch\u00fang t\u00f4i \u0111\u1ec3 \u0111\u01b0\u1ee3c h\u1ed7 tr\u1ee3. Ch\u00fac h\u1ec7 th\u1ed1ng email c\u1ee7a doanh nghi\u1ec7p b\u1ea1n lu\u00f4n an to\u00e0n v\u00e0 th\u00f4ng su\u1ed1t!<\/p>\n<p>&nbsp;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Trong b\u1ed1i c\u1ea3nh email gi\u1ea3 m\u1ea1o, phishing v\u00e0 spam ng\u00e0y c\u00e0ng tinh vi, vi\u1ec7c b\u1ea3o v\u1ec7 t\u00ean mi\u1ec1n g\u1eedi email \u0111\u00e3 tr\u1edf th\u00e0nh y\u00eau c\u1ea7u b\u1eaft bu\u1ed9c \u0111\u1ed1i v\u1edbi doanh nghi\u1ec7p v\u00e0 ch\u1ee7 website. DMARC l\u00e0 m\u1ed9t trong nh\u1eefng giao th\u1ee9c x\u00e1c th\u1ef1c email quan tr\u1ecdng gi\u00fap ng\u0103n ch\u1eb7n h\u00e0nh vi gi\u1ea3 m\u1ea1o domain, n\u00e2ng<\/p>\n","protected":false},"author":11,"featured_media":37909,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[83],"tags":[],"class_list":["post-37902","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-bao-mat-an-ninh-mang"],"_links":{"self":[{"href":"https:\/\/interdata.vn\/blog\/wp-json\/wp\/v2\/posts\/37902","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/interdata.vn\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/interdata.vn\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/interdata.vn\/blog\/wp-json\/wp\/v2\/users\/11"}],"replies":[{"embeddable":true,"href":"https:\/\/interdata.vn\/blog\/wp-json\/wp\/v2\/comments?post=37902"}],"version-history":[{"count":4,"href":"https:\/\/interdata.vn\/blog\/wp-json\/wp\/v2\/posts\/37902\/revisions"}],"predecessor-version":[{"id":38632,"href":"https:\/\/interdata.vn\/blog\/wp-json\/wp\/v2\/posts\/37902\/revisions\/38632"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/interdata.vn\/blog\/wp-json\/wp\/v2\/media\/37909"}],"wp:attachment":[{"href":"https:\/\/interdata.vn\/blog\/wp-json\/wp\/v2\/media?parent=37902"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/interdata.vn\/blog\/wp-json\/wp\/v2\/categories?post=37902"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/interdata.vn\/blog\/wp-json\/wp\/v2\/tags?post=37902"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}