{"id":37951,"date":"2026-01-16T13:33:06","date_gmt":"2026-01-16T06:33:06","guid":{"rendered":"https:\/\/interdata.vn\/blog\/?p=37951"},"modified":"2026-01-16T14:50:16","modified_gmt":"2026-01-16T07:50:16","slug":"cach-tao-mail-server-tren-vps-linux","status":"publish","type":"post","link":"https:\/\/interdata.vn\/blog\/cach-tao-mail-server-tren-vps-linux\/","title":{"rendered":"H\u01b0\u1edbng D\u1eabn C\u00e1ch T\u1ea1o Mail Server Tr\u00ean VPS Linux Chi Ti\u1ebft T\u1eeb A-Z (2026)"},"content":{"rendered":"<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_85 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\/cach-tao-mail-server-tren-vps-linux\/#Tai-sao-nen-va-khong-nen-tu-tao-Mail-Server-tren-VPS\" >T\u1ea1i sao n\u00ean (v\u00e0 kh\u00f4ng n\u00ean) t\u1ef1 t\u1ea1o Mail Server tr\u00ean VPS?<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/interdata.vn\/blog\/cach-tao-mail-server-tren-vps-linux\/#Loi-ich-cua-viec-so-huu-Mail-Server-rieng\" >L\u1ee3i \u00edch c\u1ee7a vi\u1ec7c s\u1edf h\u1eefu Mail Server ri\u00eang<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/interdata.vn\/blog\/cach-tao-mail-server-tren-vps-linux\/#Thach-thuc-can-doi-mat\" >Th\u00e1ch th\u1ee9c c\u1ea7n \u0111\u1ed1i m\u1eb7t<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/interdata.vn\/blog\/cach-tao-mail-server-tren-vps-linux\/#Chuan-bi-tai-nguyen-can-thiet\" >Chu\u1ea9n b\u1ecb t\u00e0i nguy\u00ean c\u1ea7n thi\u1ebft<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-5\" href=\"https:\/\/interdata.vn\/blog\/cach-tao-mail-server-tren-vps-linux\/#1-VPS-Virtual-Private-Server\" >1. VPS (Virtual Private Server)<\/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\/cach-tao-mail-server-tren-vps-linux\/#%F0%9F%9A%80-Bat-dau-Mail-Server-voi-VPS-InterData\" >\ud83d\ude80 B\u1eaft \u0111\u1ea7u Mail Server v\u1edbi VPS InterData<\/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\/cach-tao-mail-server-tren-vps-linux\/#2-Ten-mien-Domain-Name\" >2. T\u00ean mi\u1ec1n (Domain Name)<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-8\" href=\"https:\/\/interdata.vn\/blog\/cach-tao-mail-server-tren-vps-linux\/#3-Dia-chi-IP-sach-va-rDNS\" >3. \u0110\u1ecba ch\u1ec9 IP s\u1ea1ch v\u00e0 rDNS<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-9\" href=\"https:\/\/interdata.vn\/blog\/cach-tao-mail-server-tren-vps-linux\/#Cau-truc-hoat-dong-cua-mot-Mail-Server\" >C\u1ea5u tr\u00fac ho\u1ea1t \u0111\u1ed9ng c\u1ee7a m\u1ed9t Mail Server<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-10\" href=\"https:\/\/interdata.vn\/blog\/cach-tao-mail-server-tren-vps-linux\/#Huong-dan-ky-thuat-Cai-dat-Mail-Server-voi-Postfix-va-Dovecot\" >H\u01b0\u1edbng d\u1eabn k\u1ef9 thu\u1eadt: C\u00e0i \u0111\u1eb7t Mail Server v\u1edbi Postfix v\u00e0 Dovecot<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-11\" href=\"https:\/\/interdata.vn\/blog\/cach-tao-mail-server-tren-vps-linux\/#Buoc-1-Thiet-lap-Hostname-va-DNS\" >B\u01b0\u1edbc 1: Thi\u1ebft l\u1eadp Hostname v\u00e0 DNS<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-12\" href=\"https:\/\/interdata.vn\/blog\/cach-tao-mail-server-tren-vps-linux\/#Buoc-2-Cai-dat-Postfix-MTA\" >B\u01b0\u1edbc 2: C\u00e0i \u0111\u1eb7t Postfix (MTA)<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-13\" href=\"https:\/\/interdata.vn\/blog\/cach-tao-mail-server-tren-vps-linux\/#Buoc-3-Cai-dat-va-cau-hinh-Dovecot-MDA\" >B\u01b0\u1edbc 3: C\u00e0i \u0111\u1eb7t v\u00e0 c\u1ea5u h\u00ecnh Dovecot (MDA)<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-14\" href=\"https:\/\/interdata.vn\/blog\/cach-tao-mail-server-tren-vps-linux\/#Buoc-4-Tao-User-va-phan-quyen\" >B\u01b0\u1edbc 4: T\u1ea1o User v\u00e0 ph\u00e2n quy\u1ec1n<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-15\" href=\"https:\/\/interdata.vn\/blog\/cach-tao-mail-server-tren-vps-linux\/#Buoc-5-Cai-dat-SSLTLS-voi-Lets-Encrypt\" >B\u01b0\u1edbc 5: C\u00e0i \u0111\u1eb7t SSL\/TLS v\u1edbi Let&#8217;s Encrypt<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-16\" href=\"https:\/\/interdata.vn\/blog\/cach-tao-mail-server-tren-vps-linux\/#Toi-uu-kha-nang-vao-Inbox-Email-Deliverability\" >T\u1ed1i \u01b0u kh\u1ea3 n\u0103ng v\u00e0o Inbox (Email Deliverability)<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-17\" href=\"https:\/\/interdata.vn\/blog\/cach-tao-mail-server-tren-vps-linux\/#1-SPF-Sender-Policy-Framework\" >1. SPF (Sender Policy Framework)<\/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\/cach-tao-mail-server-tren-vps-linux\/#2-DKIM-DomainKeys-Identified-Mail\" >2. DKIM (DomainKeys Identified Mail)<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-19\" href=\"https:\/\/interdata.vn\/blog\/cach-tao-mail-server-tren-vps-linux\/#3-DMARC\" >3. DMARC<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-20\" href=\"https:\/\/interdata.vn\/blog\/cach-tao-mail-server-tren-vps-linux\/#Kiem-tra-diem-so\" >Ki\u1ec3m tra \u0111i\u1ec3m s\u1ed1<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-21\" href=\"https:\/\/interdata.vn\/blog\/cach-tao-mail-server-tren-vps-linux\/#Cai-dat-Webmail-Client-Roundcube\" >C\u00e0i \u0111\u1eb7t Webmail Client (Roundcube)<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-22\" href=\"https:\/\/interdata.vn\/blog\/cach-tao-mail-server-tren-vps-linux\/#Cac-giai-phap-thay-the-tu-dong-All-in-One-Scripts\" >C\u00e1c gi\u1ea3i ph\u00e1p thay th\u1ebf t\u1ef1 \u0111\u1ed9ng (All-in-One Scripts)<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-23\" href=\"https:\/\/interdata.vn\/blog\/cach-tao-mail-server-tren-vps-linux\/#Cau-hoi-thuong-gap-FAQs\" >C\u00e2u h\u1ecfi th\u01b0\u1eddng g\u1eb7p (FAQs)<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-24\" href=\"https:\/\/interdata.vn\/blog\/cach-tao-mail-server-tren-vps-linux\/#Tai-sao-toi-da-cau-hinh-dung-ma-gui-mail-vao-Gmail-van-bi-vao-Spam\" >T\u1ea1i sao t\u00f4i \u0111\u00e3 c\u1ea5u h\u00ecnh \u0111\u00fang m\u00e0 g\u1eedi mail v\u00e0o Gmail v\u1eabn b\u1ecb v\u00e0o Spam?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-25\" href=\"https:\/\/interdata.vn\/blog\/cach-tao-mail-server-tren-vps-linux\/#VPS-nao-cho-phep-mo-Port-25-de-gui-mail\" >VPS n\u00e0o cho ph\u00e9p m\u1edf Port 25 \u0111\u1ec3 g\u1eedi mail?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-26\" href=\"https:\/\/interdata.vn\/blog\/cach-tao-mail-server-tren-vps-linux\/#Chi-phi-duy-tri-Mail-Server-tu-host-la-bao-nhieu\" >Chi ph\u00ed duy tr\u00ec Mail Server t\u1ef1 host l\u00e0 bao nhi\u00eau?<\/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\/cach-tao-mail-server-tren-vps-linux\/#Toi-co-the-dung-Outlook-tren-may-tinh-de-check-mail-tu-VPS-khong\" >T\u00f4i c\u00f3 th\u1ec3 d\u00f9ng Outlook tr\u00ean m\u00e1y t\u00ednh \u0111\u1ec3 check mail t\u1eeb VPS kh\u00f4ng?<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-28\" href=\"https:\/\/interdata.vn\/blog\/cach-tao-mail-server-tren-vps-linux\/#Loi-ket\" >L\u1eddi k\u1ebft<\/a><\/li><\/ul><\/nav><\/div>\n<p>B\u1ea1n \u0111ang ph\u1ea3i chi tr\u1ea3 h\u00e0ng tri\u1ec7u \u0111\u1ed3ng m\u1ed7i th\u00e1ng \u0111\u1ec3 duy tr\u00ec d\u1ecbch v\u1ee5 Email doanh nghi\u1ec7p cho nh\u00e2n vi\u00ean? B\u1ea1n c\u1ea3m th\u1ea5y kh\u00f3 ch\u1ecbu v\u00ec gi\u1edbi h\u1ea1n s\u1ed1 l\u01b0\u1ee3ng t\u00e0i kho\u1ea3n ng\u01b0\u1eddi d\u00f9ng ho\u1eb7c dung l\u01b0\u1ee3ng l\u01b0u tr\u1eef th\u1ea5p? B\u1ea1n mu\u1ed1n l\u00e0m ch\u1ee7 ho\u00e0n to\u00e0n d\u1eef li\u1ec7u c\u1ee7a m\u00ecnh m\u00e0 kh\u00f4ng ph\u1ee5 thu\u1ed9c v\u00e0o b\u00ean th\u1ee9 ba? Vi\u1ec7c t\u1ef1 x\u00e2y d\u1ef1ng m\u1ed9t Mail Server tr\u00ean <a href=\"https:\/\/interdata.vn\/blog\/vps-la-gi\/\">VPS<\/a> ch\u00ednh l\u00e0 gi\u1ea3i ph\u00e1p t\u1ed1i \u01b0u cho nh\u1eefng v\u1ea5n \u0111\u1ec1 n\u00e0y.<\/p>\n<p>T\u1ef1 tri\u1ec3n khai Mail Server kh\u00f4ng ch\u1ec9 gi\u00fap doanh nghi\u1ec7p ti\u1ebft ki\u1ec7m chi ph\u00ed v\u1eadn h\u00e0nh \u0111\u00e1ng k\u1ec3 m\u00e0 c\u00f2n mang l\u1ea1i s\u1ef1 linh ho\u1ea1t tuy\u1ec7t \u0111\u1ed1i trong qu\u1ea3n l\u00fd. Tuy nhi\u00ean, nhi\u1ec1u ng\u01b0\u1eddi e ng\u1ea1i v\u00ec cho r\u1eb1ng k\u1ef9 thu\u1eadt n\u00e0y qu\u00e1 ph\u1ee9c t\u1ea1p ho\u1eb7c lo s\u1ee3 email g\u1eedi \u0111i s\u1ebd r\u01a1i v\u00e0o h\u00f2m th\u01b0 Spam.<\/p>\n<p>B\u00e0i vi\u1ebft n\u00e0y s\u1ebd h\u01b0\u1edbng d\u1eabn b\u1ea1n t\u1eebng b\u01b0\u1edbc c\u00e1ch t\u1ea1o Mail Server tr\u00ean <a href=\"https:\/\/interdata.vn\/blog\/vps-linux-la-gi\/\">VPS Linux<\/a> m\u1ed9t c\u00e1ch b\u00e0i b\u1ea3n, khoa h\u1ecdc v\u00e0 chu\u1ea9n x\u00e1c nh\u1ea5t. Ch\u00fang t\u00f4i kh\u00f4ng ch\u1ec9 h\u01b0\u1edbng d\u1eabn c\u00e0i \u0111\u1eb7t ph\u1ea7n m\u1ec1m. N\u1ed9i dung d\u01b0\u1edbi \u0111\u00e2y c\u00f2n t\u1eadp trung s\u00e2u v\u00e0o c\u00e1c k\u1ef9 thu\u1eadt t\u1ed1i \u01b0u h\u00f3a \u0111\u1ed9 uy t\u00edn c\u1ee7a <a href=\"https:\/\/interdata.vn\/blog\/domain-la-gi\/\">t\u00ean mi\u1ec1n<\/a> (Reputation) \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o t\u1ef7 l\u1ec7 email v\u00e0o Inbox \u0111\u1ea1t m\u1ee9c cao nh\u1ea5t.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"Tai-sao-nen-va-khong-nen-tu-tao-Mail-Server-tren-VPS\"><\/span>T\u1ea1i sao n\u00ean (v\u00e0 kh\u00f4ng n\u00ean) t\u1ef1 t\u1ea1o Mail Server tr\u00ean VPS?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>Tr\u01b0\u1edbc khi b\u1eaft tay v\u00e0o c\u00e1c d\u00f2ng l\u1ec7nh k\u1ef9 thu\u1eadt, ch\u00fang ta c\u1ea7n ph\u00e2n t\u00edch r\u00f5 r\u00e0ng hai m\u1eb7t c\u1ee7a v\u1ea5n \u0111\u1ec1. Vi\u1ec7c hi\u1ec3u r\u00f5 l\u1ee3i \u00edch v\u00e0 th\u00e1ch th\u1ee9c s\u1ebd gi\u00fap b\u1ea1n \u0111\u01b0a ra quy\u1ebft \u0111\u1ecbnh \u0111\u1ea7u t\u01b0 th\u1eddi gian v\u00e0 c\u00f4ng s\u1ee9c m\u1ed9t c\u00e1ch ch\u00ednh x\u00e1c.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Loi-ich-cua-viec-so-huu-Mail-Server-rieng\"><\/span>L\u1ee3i \u00edch c\u1ee7a vi\u1ec7c s\u1edf h\u1eefu Mail Server ri\u00eang<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p><strong>Ti\u1ebft ki\u1ec7m chi ph\u00ed t\u1ed1i \u0111a:<\/strong> \u0110\u00e2y l\u00e0 \u0111\u1ed9ng l\u1ef1c l\u1edbn nh\u1ea5t c\u1ee7a h\u1ea7u h\u1ebft c\u00e1c doanh nghi\u1ec7p v\u1eeba v\u00e0 nh\u1ecf (SME). Thay v\u00ec tr\u1ea3 ph\u00ed theo \u0111\u1ea7u ng\u01b0\u1eddi d\u00f9ng (v\u00ed d\u1ee5: Google Workspace kho\u1ea3ng 6$\/user\/th\u00e1ng), b\u1ea1n ch\u1ec9 c\u1ea7n thanh to\u00e1n chi ph\u00ed thu\u00ea VPS c\u1ed1 \u0111\u1ecbnh. V\u1edbi m\u1ed9t VPS c\u1ea5u h\u00ecnh t\u1ea7m trung, b\u1ea1n c\u00f3 th\u1ec3 t\u1ea1o h\u00e0ng tr\u0103m, th\u1eadm ch\u00ed h\u00e0ng ng\u00e0n t\u00e0i kho\u1ea3n email m\u00e0 kh\u00f4ng ph\u00e1t sinh th\u00eam chi ph\u00ed.<\/p>\n<p><strong>Quy\u1ec1n ri\u00eang t\u01b0 d\u1eef li\u1ec7u (Data Privacy):<\/strong> Khi s\u1eed d\u1ee5ng d\u1ecbch v\u1ee5 mi\u1ec5n ph\u00ed ho\u1eb7c tr\u1ea3 ph\u00ed t\u1eeb c\u00e1c \u00f4ng l\u1edbn c\u00f4ng ngh\u1ec7, d\u1eef li\u1ec7u email c\u1ee7a b\u1ea1n \u0111\u01b0\u1ee3c l\u01b0u tr\u1eef tr\u00ean <a href=\"https:\/\/interdata.vn\/blog\/may-chu-server-la-gi\/\">m\u00e1y ch\u1ee7<\/a> c\u1ee7a h\u1ecd. T\u1ef1 host Mail Server \u0111\u1ed3ng ngh\u0129a v\u1edbi vi\u1ec7c b\u1ea1n n\u1eafm gi\u1eef to\u00e0n b\u1ed9 c\u01a1 s\u1edf d\u1eef li\u1ec7u. Kh\u00f4ng ai c\u00f3 quy\u1ec1n truy c\u1eadp, qu\u00e9t n\u1ed9i dung email hay s\u1eed d\u1ee5ng d\u1eef li\u1ec7u \u0111\u00f3 cho m\u1ee5c \u0111\u00edch qu\u1ea3ng c\u00e1o.<\/p>\n<p><strong>Kh\u00f4ng gi\u1edbi h\u1ea1n t\u00ednh n\u0103ng:<\/strong> B\u1ea1n c\u00f3 to\u00e0n quy\u1ec1n c\u1ea5u h\u00ecnh dung l\u01b0\u1ee3ng h\u1ed9p th\u01b0 cho t\u1eebng nh\u00e2n vi\u00ean, thi\u1ebft l\u1eadp quy t\u1eafc g\u1eedi nh\u1eadn, t\u1ea1o c\u00e1c nh\u00f3m email (mailing <a href=\"https:\/\/interdata.vn\/blog\/list-trong-python\/\">list<\/a>) m\u00e0 kh\u00f4ng g\u1eb7p b\u1ea5t k\u1ef3 r\u00e0o c\u1ea3n n\u00e0o t\u1eeb nh\u00e0 cung c\u1ea5p d\u1ecbch v\u1ee5.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-full wp-image-37959\" src=\"https:\/\/interdata.vn\/blog\/wp-content\/uploads\/2026\/01\/Cach-tao-Mail-Server-tren-VPS-1.jpg\" alt=\"C\u00e1ch t\u1ea1o Mail Server tr\u00ean VPS\" width=\"750\" height=\"560\" title=\"\" srcset=\"https:\/\/interdata.vn\/blog\/wp-content\/uploads\/2026\/01\/Cach-tao-Mail-Server-tren-VPS-1.jpg 750w, https:\/\/interdata.vn\/blog\/wp-content\/uploads\/2026\/01\/Cach-tao-Mail-Server-tren-VPS-1-300x224.jpg 300w\" sizes=\"auto, (max-width: 750px) 100vw, 750px\" \/><\/p>\n<h3><span class=\"ez-toc-section\" id=\"Thach-thuc-can-doi-mat\"><\/span>Th\u00e1ch th\u1ee9c c\u1ea7n \u0111\u1ed1i m\u1eb7t<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p><strong>V\u1ea5n \u0111\u1ec1 IP Blacklist v\u00e0 \u0111\u1ed9 uy t\u00edn:<\/strong> M\u1ed9t Mail Server m\u1edbi d\u1ef1ng l\u00ean th\u01b0\u1eddng c\u00f3 \u0111\u1ed9 uy t\u00edn (IP Reputation) b\u1eb1ng kh\u00f4ng. N\u1ebfu kh\u00f4ng c\u1ea5u h\u00ecnh c\u1ea9n th\u1eadn, c\u00e1c b\u1ed9 l\u1ecdc spam c\u1ee7a Gmail, Outlook s\u1ebd ch\u1eb7n email c\u1ee7a b\u1ea1n ngay l\u1eadp t\u1ee9c. Vi\u1ec7c gi\u1eef cho <a href=\"https:\/\/interdata.vn\/blog\/dia-chi-ip-la-gi\/\">\u0111\u1ecba ch\u1ec9 IP<\/a> &#8220;s\u1ea1ch&#8221; \u0111\u00f2i h\u1ecfi s\u1ef1 qu\u1ea3n l\u00fd ch\u1eb7t ch\u1ebd.<\/p>\n<p><strong>Y\u00eau c\u1ea7u b\u1ea3o tr\u00ec th\u01b0\u1eddng xuy\u00ean:<\/strong> B\u1ea1n l\u00e0 ng\u01b0\u1eddi ch\u1ecbu tr\u00e1ch nhi\u1ec7m duy nh\u1ea5t cho s\u1ef1 ho\u1ea1t \u0111\u1ed9ng c\u1ee7a h\u1ec7 th\u1ed1ng. N\u1ebfu Server g\u1eb7p s\u1ef1 c\u1ed1, b\u1ea1n ph\u1ea3i l\u00e0 ng\u01b0\u1eddi s\u1eeda ch\u1eefa. Vi\u1ec7c c\u1eadp nh\u1eadt c\u00e1c b\u1ea3n v\u00e1 b\u1ea3o m\u1eadt c\u0169ng c\u1ea7n \u0111\u01b0\u1ee3c th\u1ef1c hi\u1ec7n \u0111\u1ecbnh k\u1ef3 \u0111\u1ec3 tr\u00e1nh b\u1ecb hacker khai th\u00e1c.<\/p>\n<p><strong>C\u1ed5ng 25 (<a href=\"https:\/\/interdata.vn\/blog\/port-la-gi\/\">Port<\/a> 25) th\u01b0\u1eddng b\u1ecb ch\u1eb7n:<\/strong> \u0110a s\u1ed1 c\u00e1c nh\u00e0 cung c\u1ea5p d\u1ecbch v\u1ee5 Cloud (<a href=\"https:\/\/interdata.vn\/blog\/cloud-server-may-chu-dam-may\/\">Cloud Server<\/a>) hi\u1ec7n nay \u0111\u1ec1u ch\u1eb7n m\u1eb7c \u0111\u1ecbnh c\u1ed5ng 25 (c\u1ed5ng d\u00f9ng \u0111\u1ec3 g\u1eedi email ra ngo\u00e0i) \u0111\u1ec3 ng\u0103n ch\u1eb7n spam. B\u1ea1n c\u1ea7n ch\u1ecdn nh\u00e0 cung c\u1ea5p cho ph\u00e9p m\u1edf c\u1ed5ng n\u00e0y ho\u1eb7c c\u00f3 ch\u00ednh s\u00e1ch h\u1ed7 tr\u1ee3 r\u00f5 r\u00e0ng.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"Chuan-bi-tai-nguyen-can-thiet\"><\/span>Chu\u1ea9n b\u1ecb t\u00e0i nguy\u00ean c\u1ea7n thi\u1ebft<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>\u0110\u1ec3 qu\u00e1 tr\u00ecnh c\u00e0i \u0111\u1eb7t di\u1ec5n ra su\u00f4n s\u1ebb, b\u1ea1n c\u1ea7n chu\u1ea9n b\u1ecb \u0111\u1ea7y \u0111\u1ee7 c\u00e1c t\u00e0i nguy\u00ean sau \u0111\u00e2y. S\u1ef1 chu\u1ea9n b\u1ecb k\u1ef9 l\u01b0\u1ee1ng s\u1ebd gi\u00fap b\u1ea1n tr\u00e1nh \u0111\u01b0\u1ee3c c\u00e1c l\u1ed7i v\u1ee5n v\u1eb7t trong qu\u00e1 tr\u00ecnh c\u1ea5u h\u00ecnh.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"1-VPS-Virtual-Private-Server\"><\/span>1. VPS (Virtual Private Server)<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>B\u1ea1n c\u1ea7n m\u1ed9t m\u00e1y ch\u1ee7 \u1ea3o v\u1edbi c\u1ea5u h\u00ecnh t\u1ed1i thi\u1ec3u \u0111\u1ec3 v\u1eadn h\u00e0nh m\u01b0\u1ee3t m\u00e0 c\u00e1c d\u1ecbch v\u1ee5 mail. <a href=\"https:\/\/interdata.vn\/blog\/he-dieu-hanh\/\">H\u1ec7 \u0111i\u1ec1u h\u00e0nh<\/a> \u0111\u01b0\u1ee3c khuy\u1ebfn ngh\u1ecb l\u00e0 <strong><a href=\"https:\/\/interdata.vn\/blog\/ubuntu-server-la-gi\/\">Ubuntu<\/a> 20.04 LTS<\/strong> ho\u1eb7c <strong>Ubuntu 22.04 LTS<\/strong> do t\u00ednh \u1ed5n \u0111\u1ecbnh v\u00e0 c\u1ed9ng \u0111\u1ed3ng h\u1ed7 tr\u1ee3 l\u1edbn.<\/p>\n<ul>\n<li><strong><a href=\"https:\/\/interdata.vn\/blog\/ram-server\/\">RAM<\/a>:<\/strong> T\u1ed1i thi\u1ec3u 2GB (Khuy\u00ean d\u00f9ng 4GB n\u1ebfu c\u00f3 s\u1eed d\u1ee5ng ph\u1ea7n m\u1ec1m qu\u00e9t virus ClamAV).<\/li>\n<li><strong><a href=\"https:\/\/interdata.vn\/blog\/cpu-server\/\">CPU<\/a>:<\/strong> 1 <a href=\"https:\/\/interdata.vn\/blog\/nhan-cpu-la-gi\/\">Core<\/a> ho\u1eb7c 2 Cores.<\/li>\n<li><strong>Disk:<\/strong> Dung l\u01b0\u1ee3ng t\u00f9y thu\u1ed9c v\u00e0o nhu c\u1ea7u l\u01b0u tr\u1eef mail c\u1ee7a b\u1ea1n (SSD l\u00e0 l\u1ef1a ch\u1ecdn t\u1ed1t nh\u1ea5t cho t\u1ed1c \u0111\u1ed9 truy xu\u1ea5t).<\/li>\n<\/ul>\n<div class=\"highlight-cta-box\">\n<h3><span class=\"ez-toc-section\" id=\"%F0%9F%9A%80-Bat-dau-Mail-Server-voi-VPS-InterData\"><\/span><span style=\"font-size: 120%; color: #ff0000;\">\ud83d\ude80 B\u1eaft \u0111\u1ea7u Mail Server v\u1edbi VPS InterData<\/span><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>Tr\u1ea3i nghi\u1ec7m ngay d\u1ecbch v\u1ee5 VPS hi\u1ec7u n\u0103ng cao, \u0111\u01b0\u1eddng truy\u1ec1n \u1ed5n \u0111\u1ecbnh v\u00e0 IP s\u1ea1ch h\u1ed7 tr\u1ee3 t\u1ed1t cho Mail Server.<\/p>\n<p><strong><span style=\"font-size: 120%; color: #0000ff;\">D\u00f9ng th\u1eed mi\u1ec5n ph\u00ed 05 ng\u00e0y<\/span> &#8211; Gi\u00e1 t\u1ed1t &#8211; T\u1ed1c \u0111\u1ed9 cao &#8211; \u0110a d\u1ea1ng g\u00f3i c\u01b0\u1edbc<\/strong><\/p>\n<p><a class=\"cta-button\" href=\"https:\/\/interdata.vn\/thue-vps\/\" target=\"_blank\" rel=\"noopener noreferrer\">\u0110\u0103ng K\u00fd D\u00f9ng Th\u1eed Ngay<\/a><\/p>\n<\/div>\n<h3><span class=\"ez-toc-section\" id=\"2-Ten-mien-Domain-Name\"><\/span>2. T\u00ean mi\u1ec1n (Domain Name)<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>B\u1ea1n c\u1ea7n s\u1edf h\u1eefu m\u1ed9t t\u00ean mi\u1ec1n ho\u1ea1t \u0111\u1ed9ng b\u00ecnh th\u01b0\u1eddng. Trong b\u00e0i vi\u1ebft n\u00e0y, ch\u00fang t\u00f4i s\u1ebd s\u1eed d\u1ee5ng t\u00ean mi\u1ec1n v\u00ed d\u1ee5 l\u00e0 <code>example.com<\/code>. B\u1ea1n h\u00e3y thay th\u1ebf b\u1eb1ng t\u00ean mi\u1ec1n th\u1ef1c t\u1ebf c\u1ee7a m\u00ecnh trong qu\u00e1 tr\u00ecnh th\u1ef1c h\u00e0nh.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"3-Dia-chi-IP-sach-va-rDNS\"><\/span>3. \u0110\u1ecba ch\u1ec9 IP s\u1ea1ch v\u00e0 rDNS<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>\u0110\u00e2y l\u00e0 y\u1ebfu t\u1ed1 s\u1ed1ng c\u00f2n. H\u00e3y ki\u1ec3m tra \u0111\u1ecba ch\u1ec9 IP c\u1ee7a VPS th\u00f4ng qua c\u00e1c c\u00f4ng c\u1ee5 nh\u01b0 <strong>MXToolbox<\/strong> \u0111\u1ec3 ch\u1eafc ch\u1eafn r\u1eb1ng IP n\u00e0y kh\u00f4ng n\u1eb1m trong b\u1ea5t k\u1ef3 danh s\u00e1ch \u0111en (Blacklist) n\u00e0o. N\u1ebfu IP b\u1ecb blacklist, email c\u1ee7a b\u1ea1n s\u1ebd kh\u00f4ng bao gi\u1edd \u0111\u1ebfn \u0111\u01b0\u1ee3c Inbox.<\/p>\n<p>B\u00ean c\u1ea1nh \u0111\u00f3, b\u1ea1n c\u1ea7n c\u1ea5u h\u00ecnh <strong>Reverse <a href=\"https:\/\/interdata.vn\/blog\/dns-la-gi\/\">DNS<\/a> (<a href=\"https:\/\/interdata.vn\/blog\/reverse-dns-la-gi\/\">rDNS<\/a>)<\/strong> hay c\u00f2n g\u1ecdi l\u00e0 <a href=\"https:\/\/interdata.vn\/blog\/ptr-record-la-gi\/\">b\u1ea3n ghi PTR<\/a>. B\u1ea3n ghi n\u00e0y gi\u00fap c\u00e1c mail server kh\u00e1c x\u00e1c minh r\u1eb1ng IP c\u1ee7a b\u1ea1n th\u1ef1c s\u1ef1 g\u1eafn li\u1ec1n v\u1edbi t\u00ean mi\u1ec1n g\u1eedi th\u01b0. B\u1ea1n th\u01b0\u1eddng ph\u1ea3i y\u00eau c\u1ea7u nh\u00e0 cung c\u1ea5p VPS c\u00e0i \u0111\u1eb7t rDNS cho m\u00ecnh.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"Cau-truc-hoat-dong-cua-mot-Mail-Server\"><\/span>C\u1ea5u tr\u00fac ho\u1ea1t \u0111\u1ed9ng c\u1ee7a m\u1ed9t Mail Server<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>Hi\u1ec3u v\u1ec1 ki\u1ebfn tr\u00fac h\u1ec7 th\u1ed1ng gi\u00fap b\u1ea1n d\u1ec5 d\u00e0ng kh\u1eafc ph\u1ee5c s\u1ef1 c\u1ed1 (troubleshoot) sau n\u00e0y. M\u1ed9t Mail Server ho\u00e0n ch\u1ec9nh l\u00e0 s\u1ef1 k\u1ebft h\u1ee3p c\u1ee7a nhi\u1ec1u th\u00e0nh ph\u1ea7n ph\u1ea7n m\u1ec1m kh\u00e1c nhau.<\/p>\n<p><strong>MTA (Mail Transfer Agent):<\/strong> \u0110\u00e2y l\u00e0 &#8220;b\u01b0u \u0111i\u1ec7n trung t\u00e2m&#8221;. Ph\u1ea7n m\u1ec1m n\u00e0y ch\u1ecbu tr\u00e1ch nhi\u1ec7m g\u1eedi th\u01b0 \u0111i t\u1eeb server c\u1ee7a b\u1ea1n \u0111\u1ebfn server ng\u01b0\u1eddi nh\u1eadn v\u00e0 nh\u1eadn th\u01b0 t\u1eeb b\u00ean ngo\u00e0i g\u1eedi v\u1ec1. Trong b\u00e0i vi\u1ebft n\u00e0y, ch\u00fang ta s\u1eed d\u1ee5ng <strong>Postfix<\/strong> &#8211; ph\u1ea7n m\u1ec1m MTA ph\u1ed5 bi\u1ebfn v\u00e0 m\u1ea1nh m\u1ebd nh\u1ea5t tr\u00ean <a href=\"https:\/\/interdata.vn\/blog\/he-dieu-hanh-linux-la-gi\/\">Linux<\/a>.<\/p>\n<p><strong>MDA (Mail Delivery Agent):<\/strong> Sau khi MTA nh\u1eadn \u0111\u01b0\u1ee3c th\u01b0, n\u00f3 c\u1ea7n m\u1ed9t &#8220;ng\u01b0\u1eddi \u0111\u01b0a th\u01b0&#8221; \u0111\u1ec3 ph\u00e2n lo\u1ea1i v\u00e0 b\u1ecf th\u01b0 v\u00e0o \u0111\u00fang h\u1ed9p th\u01b0 c\u1ee7a ng\u01b0\u1eddi d\u00f9ng. Ch\u00fang ta s\u1ebd s\u1eed d\u1ee5ng <strong>Dovecot<\/strong> cho nhi\u1ec7m v\u1ee5 n\u00e0y. Dovecot c\u0169ng cung c\u1ea5p giao th\u1ee9c POP3 v\u00e0 IMAP \u0111\u1ec3 ng\u01b0\u1eddi d\u00f9ng c\u00f3 th\u1ec3 \u0111\u1ecdc th\u01b0.<\/p>\n<p><strong>MUA (Mail User Agent):<\/strong> \u0110\u00e2y l\u00e0 c\u00e1c \u1ee9ng d\u1ee5ng m\u00e0 ng\u01b0\u1eddi d\u00f9ng cu\u1ed1i s\u1eed d\u1ee5ng \u0111\u1ec3 so\u1ea1n th\u1ea3o v\u00e0 \u0111\u1ecdc email, v\u00ed d\u1ee5 nh\u01b0 Outlook, Thunderbird, Apple Mail ho\u1eb7c giao di\u1ec7n <a href=\"https:\/\/interdata.vn\/blog\/webmail\/\">Webmail<\/a>.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-full wp-image-37958\" src=\"https:\/\/interdata.vn\/blog\/wp-content\/uploads\/2026\/01\/Cach-hoat-dong-cua-Mail-Server.jpg\" alt=\"C\u00e1ch ho\u1ea1t \u0111\u1ed9ng c\u1ee7a Mail Server\" width=\"750\" height=\"560\" title=\"\" srcset=\"https:\/\/interdata.vn\/blog\/wp-content\/uploads\/2026\/01\/Cach-hoat-dong-cua-Mail-Server.jpg 750w, https:\/\/interdata.vn\/blog\/wp-content\/uploads\/2026\/01\/Cach-hoat-dong-cua-Mail-Server-300x224.jpg 300w\" sizes=\"auto, (max-width: 750px) 100vw, 750px\" \/><\/p>\n<h2><span class=\"ez-toc-section\" id=\"Huong-dan-ky-thuat-Cai-dat-Mail-Server-voi-Postfix-va-Dovecot\"><\/span>H\u01b0\u1edbng d\u1eabn k\u1ef9 thu\u1eadt: C\u00e0i \u0111\u1eb7t Mail Server v\u1edbi Postfix v\u00e0 Dovecot<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>Ph\u1ea7n n\u00e0y s\u1ebd \u0111i s\u00e2u v\u00e0o c\u00e1c thao t\u00e1c k\u1ef9 thu\u1eadt. B\u1ea1n c\u1ea7n truy c\u1eadp v\u00e0o VPS th\u00f4ng qua <a href=\"https:\/\/interdata.vn\/blog\/ssh-la-gi\/\">SSH<\/a> v\u1edbi quy\u1ec1n <code>root<\/code> \u0111\u1ec3 th\u1ef1c hi\u1ec7n c\u00e1c l\u1ec7nh sau.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Buoc-1-Thiet-lap-Hostname-va-DNS\"><\/span>B\u01b0\u1edbc 1: Thi\u1ebft l\u1eadp Hostname v\u00e0 DNS<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>Mail Server c\u1ea7n m\u1ed9t \u0111\u1ecbnh danh r\u00f5 r\u00e0ng. Th\u00f4ng th\u01b0\u1eddng, ch\u00fang ta \u0111\u1eb7t hostname l\u00e0 <code>mail.example.com<\/code>. Ch\u1ea1y l\u1ec7nh sau \u0111\u1ec3 thi\u1ebft l\u1eadp:<\/p>\n<pre><code class=\"language-plaintext\">hostnamectl set-hostname mail.example.com<\/code><\/pre>\n<p>Ti\u1ebfp theo, b\u1ea1n c\u1ea7n m\u1edf file <code>\/etc\/hosts<\/code> v\u00e0 th\u00eam d\u00f2ng sau \u0111\u1ec3 map IP v\u1edbi hostname:<\/p>\n<pre><code class=\"language-plaintext\">123.123.123.123 mail.example.com mail<\/code><\/pre>\n<p><i>(Thay 123.123.123.123 b\u1eb1ng IP VPS c\u1ee7a b\u1ea1n)<\/i><\/p>\n<p>T\u1ea1i trang qu\u1ea3n l\u00fd DNS c\u1ee7a nh\u00e0 cung c\u1ea5p t\u00ean mi\u1ec1n, b\u1ea1n c\u1ea7n t\u1ea1o c\u00e1c b\u1ea3n ghi sau:<\/p>\n<ul>\n<li><strong><a href=\"https:\/\/interdata.vn\/blog\/ban-ghi-a-la-gi\/\">A Record<\/a>:<\/strong> <code>mail<\/code> tr\u1ecf v\u1ec1 IP VPS.<\/li>\n<li><strong><a href=\"https:\/\/interdata.vn\/blog\/ban-ghi-mx-la-gi\/\">MX Record<\/a>:<\/strong> <code>@<\/code> tr\u1ecf v\u1ec1 <code>mail.example.com<\/code> (Priority 10).<\/li>\n<\/ul>\n<h3><span class=\"ez-toc-section\" id=\"Buoc-2-Cai-dat-Postfix-MTA\"><\/span>B\u01b0\u1edbc 2: C\u00e0i \u0111\u1eb7t Postfix (MTA)<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>C\u1eadp nh\u1eadt h\u1ec7 th\u1ed1ng v\u00e0 c\u00e0i \u0111\u1eb7t Postfix b\u1eb1ng l\u1ec7nh:<\/p>\n<pre><code class=\"language-plaintext\">apt update\r\napt install postfix -y<\/code><\/pre>\n<p>Trong qu\u00e1 tr\u00ecnh c\u00e0i \u0111\u1eb7t, m\u1ed9t m\u00e0n h\u00ecnh c\u1ea5u h\u00ecnh m\u00e0u h\u1ed3ng s\u1ebd hi\u1ec7n ra. B\u1ea1n h\u00e3y ch\u1ecdn c\u00e1c t\u00f9y ch\u1ecdn sau:<\/p>\n<ul>\n<li><strong>General type of mail configuration:<\/strong> Ch\u1ecdn <code><a href=\"https:\/\/interdata.vn\/blog\/mang-internet\/\">Internet<\/a> Site<\/code>.<\/li>\n<li><strong>System mail name:<\/strong> \u0110i\u1ec1n t\u00ean mi\u1ec1n ch\u00ednh c\u1ee7a b\u1ea1n, v\u00ed d\u1ee5 <code>example.com<\/code>.<\/li>\n<\/ul>\n<p>Sau khi c\u00e0i \u0111\u1eb7t xong, b\u1ea1n c\u1ea7n c\u1ea5u h\u00ecnh Postfix \u0111\u1ec3 n\u00f3 ho\u1ea1t \u0111\u1ed9ng \u0111\u00fang. M\u1edf file c\u1ea5u h\u00ecnh ch\u00ednh:<\/p>\n<pre><code class=\"language-plaintext\">nano \/etc\/postfix\/main.cf<\/code><\/pre>\n<p>T\u00ecm v\u00e0 ch\u1ec9nh s\u1eeda (ho\u1eb7c th\u00eam) c\u00e1c d\u00f2ng sau \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o Postfix l\u1eafng nghe tr\u00ean t\u1ea5t c\u1ea3 c\u00e1c giao di\u1ec7n m\u1ea1ng v\u00e0 s\u1eed d\u1ee5ng \u0111\u1ecbnh d\u1ea1ng h\u1ed9p th\u01b0 Maildir (thay v\u00ec Mbox c\u0169 k\u1ef9):<\/p>\n<pre><code class=\"language-plaintext\">inet_interfaces = all\r\nhome_mailbox = Maildir\/<\/code><\/pre>\n<p>Kh\u1edfi \u0111\u1ed9ng l\u1ea1i Postfix \u0111\u1ec3 \u00e1p d\u1ee5ng thay \u0111\u1ed5i:<\/p>\n<pre><code class=\"language-plaintext\">systemctl restart postfix<\/code><\/pre>\n<h3><span class=\"ez-toc-section\" id=\"Buoc-3-Cai-dat-va-cau-hinh-Dovecot-MDA\"><\/span>B\u01b0\u1edbc 3: C\u00e0i \u0111\u1eb7t v\u00e0 c\u1ea5u h\u00ecnh Dovecot (MDA)<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>Dovecot gi\u00fap ch\u00fang ta l\u1ea5y th\u01b0 v\u1ec1 qua giao th\u1ee9c POP3 ho\u1eb7c IMAP. C\u00e0i \u0111\u1eb7t Dovecot v\u00e0 c\u00e1c module c\u1ea7n thi\u1ebft:<\/p>\n<pre><code class=\"language-plaintext\">apt install dovecot-core dovecot-imapd dovecot-pop3d -y<\/code><\/pre>\n<p>Ch\u00fang ta c\u1ea7n c\u1ea5u h\u00ecnh Dovecot \u0111\u1ec3 n\u00f3 bi\u1ebft Postfix \u0111ang l\u01b0u th\u01b0 \u1edf \u0111\u00e2u. M\u1edf file c\u1ea5u h\u00ecnh <code>10-mail.conf<\/code>:<\/p>\n<pre><code class=\"language-plaintext\">nano \/etc\/dovecot\/conf.d\/10-mail.conf<\/code><\/pre>\n<p>T\u00ecm d\u00f2ng <code>mail_location<\/code> v\u00e0 s\u1eeda th\u00e0nh:<\/p>\n<pre><code class=\"language-plaintext\">mail_location = maildir:~\/Maildir<\/code><\/pre>\n<p>Ti\u1ebfp theo, \u0111\u1ec3 cho ph\u00e9p x\u00e1c th\u1ef1c ng\u01b0\u1eddi d\u00f9ng, ch\u00fang ta c\u1ea7n ch\u1ec9nh s\u1eeda file <code>10-auth.conf<\/code>:<\/p>\n<pre><code class=\"language-plaintext\">nano \/etc\/dovecot\/conf.d\/10-auth.conf<\/code><\/pre>\n<p>T\u00ecm d\u00f2ng <code>disable_plaintext_auth<\/code> v\u00e0 b\u1ecf ch\u00fa th\u00edch (uncomment), \u0111\u1eb7t gi\u00e1 tr\u1ecb l\u00e0 <code>no<\/code>:<\/p>\n<pre><code class=\"language-plaintext\">disable_plaintext_auth = no<\/code><\/pre>\n<p>T\u00ecm d\u00f2ng <code>auth_mechanisms<\/code> v\u00e0 th\u00eam <code>login<\/code>:<\/p>\n<pre><code class=\"language-plaintext\">auth_mechanisms = plain login<\/code><\/pre>\n<p>Kh\u1edfi \u0111\u1ed9ng l\u1ea1i Dovecot:<\/p>\n<pre><code class=\"language-plaintext\">systemctl restart dovecot<\/code><\/pre>\n<h3><span class=\"ez-toc-section\" id=\"Buoc-4-Tao-User-va-phan-quyen\"><\/span>B\u01b0\u1edbc 4: T\u1ea1o User v\u00e0 ph\u00e2n quy\u1ec1n<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>Trong m\u00f4 h\u00ecnh \u0111\u01a1n gi\u1ea3n n\u00e0y, ch\u00fang ta s\u1eed d\u1ee5ng user c\u1ee7a h\u1ec7 th\u1ed1ng Linux l\u00e0m user email. \u0110\u1ec3 t\u1ea1o m\u1ed9t t\u00e0i kho\u1ea3n email m\u1edbi (v\u00ed d\u1ee5: <code>contact@example.com<\/code>), b\u1ea1n t\u1ea1o m\u1ed9t user Linux t\u00ean l\u00e0 <code>contact<\/code>:<\/p>\n<pre><code class=\"language-plaintext\">adduser contact<\/code><\/pre>\n<p>H\u1ec7 th\u1ed1ng s\u1ebd y\u00eau c\u1ea7u b\u1ea1n nh\u1eadp m\u1eadt kh\u1ea9u cho user n\u00e0y. \u0110\u00e2y ch\u00ednh l\u00e0 m\u1eadt kh\u1ea9u \u0111\u0103ng nh\u1eadp email.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Buoc-5-Cai-dat-SSLTLS-voi-Lets-Encrypt\"><\/span>B\u01b0\u1edbc 5: C\u00e0i \u0111\u1eb7t SSL\/TLS v\u1edbi Let&#8217;s Encrypt<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>\u0110\u1ec3 b\u1ea3o m\u1eadt th\u00f4ng tin \u0111\u0103ng nh\u1eadp v\u00e0 n\u1ed9i dung email, vi\u1ec7c m\u00e3 h\u00f3a k\u1ebft n\u1ed1i l\u00e0 b\u1eaft bu\u1ed9c. Ch\u00fang ta s\u1ebd s\u1eed d\u1ee5ng Certbot \u0111\u1ec3 l\u1ea5y <a href=\"https:\/\/interdata.vn\/blog\/chung-chi-ssl\/\">ch\u1ee9ng ch\u1ec9 SSL<\/a> mi\u1ec5n ph\u00ed.<\/p>\n<pre><code class=\"language-plaintext\">apt install certbot -y\r\ncertbot certonly --standalone -d mail.example.com<\/code><\/pre>\n<p>Sau khi c\u00f3 ch\u1ee9ng ch\u1ec9, b\u1ea1n c\u1ea7n c\u1ea5u h\u00ecnh Postfix v\u00e0 Dovecot tr\u1ecf \u0111\u1ebfn file ch\u1ee9ng ch\u1ec9 n\u00e0y \u0111\u1ec3 k\u00edch ho\u1ea1t b\u1ea3o m\u1eadt SMTPS v\u00e0 IMAPS. \u0110i\u1ec1u n\u00e0y gi\u00fap tr\u00e1nh vi\u1ec7c tr\u00ecnh duy\u1ec7t ho\u1eb7c \u1ee9ng d\u1ee5ng mail c\u1ea3nh b\u00e1o b\u1ea3o m\u1eadt.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"Toi-uu-kha-nang-vao-Inbox-Email-Deliverability\"><\/span>T\u1ed1i \u01b0u kh\u1ea3 n\u0103ng v\u00e0o Inbox (Email Deliverability)<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>C\u00e0i \u0111\u1eb7t xong Mail Server m\u1edbi ch\u1ec9 l\u00e0 50% ch\u1eb7ng \u0111\u01b0\u1eddng. 50% c\u00f2n l\u1ea1i quy\u1ebft \u0111\u1ecbnh s\u1ef1 th\u00e0nh b\u1ea1i n\u1eb1m \u1edf vi\u1ec7c c\u1ea5u h\u00ecnh x\u00e1c th\u1ef1c \u0111\u1ec3 c\u00e1c \u00f4ng l\u1edbn nh\u01b0 Google, Microsoft tin t\u01b0\u1edfng email c\u1ee7a b\u1ea1n. N\u1ebfu b\u1ecf qua b\u01b0\u1edbc n\u00e0y, email c\u1ee7a b\u1ea1n ch\u1eafc ch\u1eafn s\u1ebd v\u00e0o Spam.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"1-SPF-Sender-Policy-Framework\"><\/span>1. SPF (Sender Policy Framework)<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>SPF l\u00e0 m\u1ed9t b\u1ea3n ghi DNS khai b\u00e1o danh s\u00e1ch c\u00e1c IP \u0111\u01b0\u1ee3c ph\u00e9p g\u1eedi email thay m\u1eb7t cho t\u00ean mi\u1ec1n c\u1ee7a b\u1ea1n. N\u00f3 ng\u0103n ch\u1eb7n k\u1ebb gi\u1ea3 m\u1ea1o s\u1eed d\u1ee5ng t\u00ean mi\u1ec1n c\u1ee7a b\u1ea1n \u0111\u1ec3 g\u1eedi th\u01b0 r\u00e1c.<\/p>\n<p><strong>C\u00e1ch l\u00e0m:<\/strong> Th\u00eam m\u1ed9t b\u1ea3n ghi TXT v\u00e0o DNS:<\/p>\n<ul>\n<li><strong>Host:<\/strong> @<\/li>\n<li><strong>Value:<\/strong> <code>v=spf1 mx a ip4:123.123.123.123 -all<\/code><\/li>\n<\/ul>\n<h3><span class=\"ez-toc-section\" id=\"2-DKIM-DomainKeys-Identified-Mail\"><\/span>2. DKIM (DomainKeys Identified Mail)<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p><a href=\"https:\/\/interdata.vn\/blog\/dkim-la-gi\/\">DKIM<\/a> th\u00eam m\u1ed9t ch\u1eef k\u00fd s\u1ed1 v\u00e0o <a href=\"https:\/\/interdata.vn\/blog\/header-la-gi\/\">header<\/a> c\u1ee7a m\u1ed7i email g\u1eedi \u0111i. Server nh\u1eadn s\u1ebd d\u00f9ng kh\u00f3a c\u00f4ng khai (Public Key) tr\u00ean DNS \u0111\u1ec3 gi\u1ea3i m\u00e3 v\u00e0 x\u00e1c minh r\u1eb1ng email n\u00e0y kh\u00f4ng b\u1ecb ch\u1ec9nh s\u1eeda tr\u00ean \u0111\u01b0\u1eddng truy\u1ec1n.<\/p>\n<p>B\u1ea1n c\u1ea7n c\u00e0i \u0111\u1eb7t <code>opendkim<\/code> v\u00e0 c\u1ea5u h\u00ecnh n\u00f3 k\u1ebft n\u1ed1i v\u1edbi Postfix. Sau khi t\u1ea1o c\u1eb7p kh\u00f3a (Private\/Public Key), b\u1ea1n s\u1ebd l\u1ea5y chu\u1ed7i Public Key \u0111\u1ec3 th\u00eam v\u00e0o b\u1ea3n ghi TXT tr\u00ean DNS.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"3-DMARC\"><\/span>3. DMARC<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p><a href=\"https:\/\/interdata.vn\/blog\/dmarc-la-gi\/\">DMARC<\/a> s\u1eed d\u1ee5ng c\u1ea3 SPF v\u00e0 DKIM \u0111\u1ec3 \u0111\u01b0a ra quy\u1ebft \u0111\u1ecbnh cu\u1ed1i c\u00f9ng. N\u00f3 cho ph\u00e9p b\u1ea1n quy \u0111\u1ecbnh server nh\u1eadn s\u1ebd l\u00e0m g\u00ec n\u1ebfu m\u1ed9t email kh\u00f4ng v\u01b0\u1ee3t qua b\u00e0i ki\u1ec3m tra SPF ho\u1eb7c DKIM (v\u00ed d\u1ee5: t\u1eeb ch\u1ed1i lu\u00f4n ho\u1eb7c \u0111\u01b0a v\u00e0o spam).<\/p>\n<p><strong>B\u1ea3n ghi DMARC c\u01a1 b\u1ea3n:<\/strong><\/p>\n<ul>\n<li><strong>Host:<\/strong> _dmarc<\/li>\n<li><strong>Value:<\/strong> <code>v=DMARC1; p=none; pct=100; rua=mailto:admin@example.com<\/code><\/li>\n<\/ul>\n<h3><span class=\"ez-toc-section\" id=\"Kiem-tra-diem-so\"><\/span>Ki\u1ec3m tra \u0111i\u1ec3m s\u1ed1<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>Sau khi ho\u00e0n t\u1ea5t c\u00e1c b\u01b0\u1edbc tr\u00ean, h\u00e3y truy c\u1eadp trang <strong>Mail-tester.com<\/strong>. Copy \u0111\u1ecba ch\u1ec9 email m\u00e0 <a href=\"https:\/\/interdata.vn\/blog\/page-la-gi\/\">trang web<\/a> n\u00e0y cung c\u1ea5p v\u00e0 g\u1eedi m\u1ed9t email t\u1eeb server c\u1ee7a b\u1ea1n \u0111\u1ebfn \u0111\u1ecba ch\u1ec9 \u0111\u00f3. H\u1ec7 th\u1ed1ng s\u1ebd ch\u1ea5m \u0111i\u1ec3m \u0111\u1ed9 uy t\u00edn c\u1ee7a b\u1ea1n. M\u1ee5c ti\u00eau c\u1ee7a ch\u00fang ta l\u00e0 \u0111\u1ea1t <strong>10\/10 \u0111i\u1ec3m<\/strong>.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"Cai-dat-Webmail-Client-Roundcube\"><\/span>C\u00e0i \u0111\u1eb7t Webmail Client (Roundcube)<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>\u0110\u1ec3 thu\u1eadn ti\u1ec7n cho ng\u01b0\u1eddi d\u00f9ng kh\u00f4ng r\u00e0nh k\u1ef9 thu\u1eadt, vi\u1ec7c cung c\u1ea5p m\u1ed9t giao di\u1ec7n web (Webmail) l\u00e0 r\u1ea5t c\u1ea7n thi\u1ebft. <strong>Roundcube<\/strong> l\u00e0 <a href=\"https:\/\/interdata.vn\/blog\/source-code-la-gi\/\">m\u00e3 ngu\u1ed3n<\/a> Webmail ph\u1ed5 bi\u1ebfn, nh\u1eb9 v\u00e0 c\u00f3 giao di\u1ec7n hi\u1ec7n \u0111\u1ea1i.<\/p>\n<p>\u0110\u1ec3 c\u00e0i Roundcube, b\u1ea1n c\u1ea7n c\u00e0i \u0111\u1eb7t m\u1ed9t LAMP <a href=\"https:\/\/interdata.vn\/blog\/stack-la-gi\/\">stack<\/a> c\u01a1 b\u1ea3n (Linux, Apache\/Nginx, MySQL\/MariaDB, <a href=\"https:\/\/interdata.vn\/blog\/php-la-gi\/\">PHP<\/a>). Roundcube ho\u1ea1t \u0111\u1ed9ng nh\u01b0 m\u1ed9t <a href=\"https:\/\/interdata.vn\/blog\/website-la-gi\/\">website<\/a> th\u00f4ng th\u01b0\u1eddng, k\u1ebft n\u1ed1i \u0111\u1ebfn Dovecot qua IMAP v\u00e0 Postfix qua <a href=\"https:\/\/interdata.vn\/blog\/smtp-la-gi\/\">SMTP<\/a> \u0111\u1ec3 x\u1eed l\u00fd th\u01b0.<\/p>\n<p>Sau khi t\u1ea3i source code Roundcube v\u1ec1 th\u01b0 m\u1ee5c <code>\/var\/www\/html<\/code>, b\u1ea1n truy c\u1eadp v\u00e0o tr\u00ecnh duy\u1ec7t \u0111\u1ec3 ch\u1ea1y tr\u00ecnh c\u00e0i \u0111\u1eb7t (Installer). Roundcube s\u1ebd y\u00eau c\u1ea7u b\u1ea1n nh\u1eadp th\u00f4ng tin database v\u00e0 th\u00f4ng tin k\u1ebft n\u1ed1i IMAP\/SMTP (th\u01b0\u1eddng l\u00e0 <code>localhost<\/code> n\u1ebfu c\u00e0i tr\u00ean c\u00f9ng server).<\/p>\n<h2><span class=\"ez-toc-section\" id=\"Cac-giai-phap-thay-the-tu-dong-All-in-One-Scripts\"><\/span>C\u00e1c gi\u1ea3i ph\u00e1p thay th\u1ebf t\u1ef1 \u0111\u1ed9ng (All-in-One Scripts)<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>N\u1ebfu b\u1ea1n c\u1ea3m th\u1ea5y quy tr\u00ecnh th\u1ee7 c\u00f4ng ph\u00eda tr\u00ean qu\u00e1 ph\u1ee9c t\u1ea1p v\u00e0 d\u1ec5 sai s\u00f3t, c\u00e1c gi\u1ea3i ph\u00e1p &#8220;m\u00ec \u0103n li\u1ec1n&#8221; (All-in-One) l\u00e0 s\u1ef1 l\u1ef1a ch\u1ecdn h\u1ee3p l\u00fd. C\u00e1c script n\u00e0y t\u1ef1 \u0111\u1ed9ng h\u00f3a to\u00e0n b\u1ed9 qu\u00e1 tr\u00ecnh c\u00e0i \u0111\u1eb7t Postfix, Dovecot, SpamAssassin, ClamAV v\u00e0 Webmail ch\u1ec9 v\u1edbi m\u1ed9t d\u00f2ng l\u1ec7nh.<\/p>\n<ul>\n<li><strong>iRedMail:<\/strong> Gi\u1ea3i ph\u00e1p k\u1ef3 c\u1ef1u, r\u1ea5t \u1ed5n \u0111\u1ecbnh, h\u1ed7 tr\u1ee3 Nginx\/Apache. Tuy nhi\u00ean, giao di\u1ec7n qu\u1ea3n tr\u1ecb b\u1ea3n mi\u1ec5n ph\u00ed h\u01a1i h\u1ea1n ch\u1ebf.<\/li>\n<li><strong>Mailcow (Dockerized):<\/strong> Ch\u1ea1y tr\u00ean n\u1ec1n t\u1ea3ng <a href=\"https:\/\/interdata.vn\/blog\/docker-la-gi\/\">Docker<\/a>, r\u1ea5t hi\u1ec7n \u0111\u1ea1i, giao di\u1ec7n \u0111\u1eb9p, t\u00edch h\u1ee3p s\u1eb5n nhi\u1ec1u t\u00ednh n\u0103ng cao c\u1ea5p nh\u01b0 2FA, ActiveSync. Y\u00eau c\u1ea7u VPS c\u1ea5u h\u00ecnh cao h\u01a1n m\u1ed9t ch\u00fat.<\/li>\n<li><strong><a href=\"https:\/\/interdata.vn\/blog\/cyberpanel-la-gi\/\">CyberPanel<\/a>:<\/strong> N\u1ebfu b\u1ea1n \u0111ang d\u00f9ng CyberPanel \u0111\u1ec3 qu\u1ea3n l\u00fd web, n\u00f3 \u0111\u00e3 t\u00edch h\u1ee3p s\u1eb5n Mail Server r\u1ea5t m\u1ea1nh m\u1ebd, t\u1ef1 \u0111\u1ed9ng c\u00e0i \u0111\u1eb7t SSL v\u00e0 DKIM cho b\u1ea1n.<\/li>\n<\/ul>\n<h2><span class=\"ez-toc-section\" id=\"Cau-hoi-thuong-gap-FAQs\"><\/span>C\u00e2u h\u1ecfi th\u01b0\u1eddng g\u1eb7p (FAQs)<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<h3><span class=\"ez-toc-section\" id=\"Tai-sao-toi-da-cau-hinh-dung-ma-gui-mail-vao-Gmail-van-bi-vao-Spam\"><\/span>T\u1ea1i sao t\u00f4i \u0111\u00e3 c\u1ea5u h\u00ecnh \u0111\u00fang m\u00e0 g\u1eedi mail v\u00e0o Gmail v\u1eabn b\u1ecb v\u00e0o Spam?<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>C\u00f3 nhi\u1ec1u nguy\u00ean nh\u00e2n d\u1eabn \u0111\u1ebfn t\u00ecnh tr\u1ea1ng n\u00e0y. Ph\u1ed5 bi\u1ebfn nh\u1ea5t l\u00e0 do IP c\u1ee7a VPS m\u1edbi mua ch\u01b0a c\u00f3 \u0111\u1ed9 tin c\u1eady (Warm-up IP). B\u1ea1n c\u1ea7n g\u1eedi s\u1ed1 l\u01b0\u1ee3ng \u00edt v\u00e0 t\u0103ng d\u1ea7n theo th\u1eddi gian. Ngo\u00e0i ra, n\u1ed9i dung email qu\u00e1 ng\u1eafn, ch\u1ee9a nhi\u1ec1u link ho\u1eb7c t\u1eeb kh\u00f3a nh\u1ea1y c\u1ea3m c\u0169ng l\u00e0 nguy\u00ean nh\u00e2n. H\u00e3y ch\u1eafc ch\u1eafn \u0111i\u1ec3m Mail-tester c\u1ee7a b\u1ea1n \u0111\u1ea1t 10\/10.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"VPS-nao-cho-phep-mo-Port-25-de-gui-mail\"><\/span>VPS n\u00e0o cho ph\u00e9p m\u1edf Port 25 \u0111\u1ec3 g\u1eedi mail?<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>H\u1ea7u h\u1ebft c\u00e1c nh\u00e0 cung c\u1ea5p nh\u01b0 Vultr, DigitalOcean, Google Cloud \u0111\u1ec1u ch\u1eb7n Port 25 m\u1eb7c \u0111\u1ecbnh \u0111\u1ed1i v\u1edbi t\u00e0i kho\u1ea3n m\u1edbi. B\u1ea1n c\u1ea7n g\u1eedi ticket y\u00eau c\u1ea7u h\u1ed7 tr\u1ee3 m\u1edf port n\u00e0y v\u00e0 ch\u1ee9ng minh m\u1ee5c \u0111\u00edch s\u1eed d\u1ee5ng h\u1ee3p l\u1ec7. T\u1ea1i InterData, ch\u00fang t\u00f4i c\u00f3 ch\u00ednh s\u00e1ch h\u1ed7 tr\u1ee3 linh ho\u1ea1t cho kh\u00e1ch h\u00e0ng c\u00f3 nhu c\u1ea7u ch\u00ednh \u0111\u00e1ng.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Chi-phi-duy-tri-Mail-Server-tu-host-la-bao-nhieu\"><\/span>Chi ph\u00ed duy tr\u00ec Mail Server t\u1ef1 host l\u00e0 bao nhi\u00eau?<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>Chi ph\u00ed duy nh\u1ea5t b\u1ea1n ph\u1ea3i tr\u1ea3 l\u00e0 ti\u1ec1n thu\u00ea VPS v\u00e0 gia h\u1ea1n t\u00ean mi\u1ec1n h\u00e0ng n\u0103m. V\u00ed d\u1ee5, m\u1ed9t VPS gi\u00e1 kho\u1ea3ng 150.000\u0111 &#8211; 200.000\u0111\/th\u00e1ng c\u00f3 th\u1ec3 ph\u1ee5c v\u1ee5 t\u1ed1t cho m\u1ed9t c\u00f4ng ty 20-30 nh\u00e2n vi\u00ean. R\u1ebb h\u01a1n r\u1ea5t nhi\u1ec1u so v\u1edbi vi\u1ec7c mua 30 licenses c\u1ee7a Google Workspace.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Toi-co-the-dung-Outlook-tren-may-tinh-de-check-mail-tu-VPS-khong\"><\/span>T\u00f4i c\u00f3 th\u1ec3 d\u00f9ng Outlook tr\u00ean m\u00e1y t\u00ednh \u0111\u1ec3 check mail t\u1eeb VPS kh\u00f4ng?<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>Ho\u00e0n to\u00e0n \u0111\u01b0\u1ee3c. B\u1ea1n ch\u1ec9 c\u1ea7n c\u1ea5u h\u00ecnh t\u00e0i kho\u1ea3n m\u1edbi trong Outlook, ch\u1ecdn giao th\u1ee9c IMAP ho\u1eb7c POP3, \u0111i\u1ec1n th\u00f4ng tin Server (mail.example.com), Port (993 cho IMAP SSL, 465 cho SMTP SSL) v\u00e0 User\/Pass l\u00e0 c\u00f3 th\u1ec3 s\u1eed d\u1ee5ng b\u00ecnh th\u01b0\u1eddng.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"Loi-ket\"><\/span>L\u1eddi k\u1ebft<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>Vi\u1ec7c x\u00e2y d\u1ef1ng m\u1ed9t Mail Server tr\u00ean VPS Linux l\u00e0 m\u1ed9t qu\u00e1 tr\u00ecnh \u0111\u00f2i h\u1ecfi s\u1ef1 ki\u00ean nh\u1eabn v\u00e0 ki\u1ebfn th\u1ee9c k\u1ef9 thu\u1eadt nh\u1ea5t \u0111\u1ecbnh. Tuy nhi\u00ean, th\u00e0nh qu\u1ea3 mang l\u1ea1i l\u00e0 s\u1ef1 t\u1ef1 ch\u1ee7 ho\u00e0n to\u00e0n v\u1ec1 d\u1eef li\u1ec7u v\u00e0 t\u1ed1i \u01b0u h\u00f3a chi ph\u00ed v\u1eadn h\u00e0nh cho doanh nghi\u1ec7p. B\u00e0i vi\u1ebft \u0111\u00e3 h\u01b0\u1edbng d\u1eabn b\u1ea1n \u0111i t\u1eeb nh\u1eefng kh\u00e1i ni\u1ec7m c\u01a1 b\u1ea3n nh\u1ea5t \u0111\u1ebfn c\u00e1c b\u01b0\u1edbc c\u00e0i \u0111\u1eb7t chi ti\u1ebft Postfix, Dovecot v\u00e0 c\u00e1c chu\u1ea9n x\u00e1c th\u1ef1c SPF, DKIM.<\/p>\n<p>N\u1ebfu b\u1ea1n l\u00e0 doanh nghi\u1ec7p c\u1ea7n s\u1ef1 \u1ed5n \u0111\u1ecbnh tuy\u1ec7t \u0111\u1ed1i m\u00e0 kh\u00f4ng c\u00f3 \u0111\u1ed9i ng\u0169 k\u1ef9 thu\u1eadt chuy\u00ean s\u00e2u, gi\u1ea3i ph\u00e1p l\u1ea1i (Hybrid) ho\u1eb7c s\u1eed d\u1ee5ng c\u00e1c d\u1ecbch v\u1ee5 <a href=\"https:\/\/interdata.vn\/blog\/email-hosting-la-gi\/\">Email Hosting<\/a> chuy\u00ean nghi\u1ec7p c\u00f3 th\u1ec3 l\u00e0 ph\u01b0\u01a1ng \u00e1n an to\u00e0n h\u01a1n. Tuy nhi\u00ean, n\u1ebfu b\u1ea1n mu\u1ed1n h\u1ecdc h\u1ecfi v\u00e0 ki\u1ec3m so\u00e1t h\u1ec7 th\u1ed1ng, h\u00e3y b\u1eaft tay v\u00e0o th\u1ef1c h\u00e0nh ngay h\u00f4m nay.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>B\u1ea1n \u0111ang ph\u1ea3i chi tr\u1ea3 h\u00e0ng tri\u1ec7u \u0111\u1ed3ng m\u1ed7i th\u00e1ng \u0111\u1ec3 duy tr\u00ec d\u1ecbch v\u1ee5 Email doanh nghi\u1ec7p cho nh\u00e2n vi\u00ean? B\u1ea1n c\u1ea3m th\u1ea5y kh\u00f3 ch\u1ecbu v\u00ec gi\u1edbi h\u1ea1n s\u1ed1 l\u01b0\u1ee3ng t\u00e0i kho\u1ea3n ng\u01b0\u1eddi d\u00f9ng ho\u1eb7c dung l\u01b0\u1ee3ng l\u01b0u tr\u1eef th\u1ea5p? B\u1ea1n mu\u1ed1n l\u00e0m ch\u1ee7 ho\u00e0n to\u00e0n d\u1eef li\u1ec7u c\u1ee7a m\u00ecnh m\u00e0 kh\u00f4ng ph\u1ee5 thu\u1ed9c<\/p>\n","protected":false},"author":2,"featured_media":37960,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[49],"tags":[],"class_list":["post-37951","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-vps"],"_links":{"self":[{"href":"https:\/\/interdata.vn\/blog\/wp-json\/wp\/v2\/posts\/37951","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\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/interdata.vn\/blog\/wp-json\/wp\/v2\/comments?post=37951"}],"version-history":[{"count":4,"href":"https:\/\/interdata.vn\/blog\/wp-json\/wp\/v2\/posts\/37951\/revisions"}],"predecessor-version":[{"id":37971,"href":"https:\/\/interdata.vn\/blog\/wp-json\/wp\/v2\/posts\/37951\/revisions\/37971"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/interdata.vn\/blog\/wp-json\/wp\/v2\/media\/37960"}],"wp:attachment":[{"href":"https:\/\/interdata.vn\/blog\/wp-json\/wp\/v2\/media?parent=37951"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/interdata.vn\/blog\/wp-json\/wp\/v2\/categories?post=37951"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/interdata.vn\/blog\/wp-json\/wp\/v2\/tags?post=37951"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}