{"id":8141,"date":"2025-10-05T18:14:00","date_gmt":"2025-10-05T11:14:00","guid":{"rendered":"https:\/\/longvan.net\/cong-dong\/?p=8141"},"modified":"2025-10-05T18:32:52","modified_gmt":"2025-10-05T11:32:52","slug":"huong-dan-su-dung-mail-tester-de-kiem-tra-suc-khoe-mail-domains","status":"publish","type":"post","link":"https:\/\/longvan.net\/cong-dong\/huong-dan-su-dung-mail-tester-de-kiem-tra-suc-khoe-mail-domains\/","title":{"rendered":"H\u01b0\u1edbng d\u1eabn s\u1eed d\u1ee5ng Mail-Tester \u0111\u1ec3 ki\u1ec3m tra s\u1ee9c kh\u1ecfe mail domains"},"content":{"rendered":"<h3>1. Mail-Tester l\u00e0 g\u00ec?<\/h3>\n<p dir=\"auto\">Mail-Tester l\u00e0 m\u1ed9t c\u00f4ng c\u1ee5 ki\u1ec3m tra s\u1ee9c kh\u1ecfe email (email health check) mi\u1ec5n ph\u00ed, tr\u1ef1c tuy\u1ebfn, kh\u00f4ng y\u00eau c\u1ea7u \u0111\u0103ng k\u00fd, r\u1ea5t ph\u00f9 h\u1ee3p \u0111\u1ec3 ki\u1ec3m tra domain email nh\u01b0 banana-pancakes.com (t\u1eeb t\u00e0i li\u1ec7u b\u1ea1n cung c\u1ea5p). N\u00f3 \u0111\u00e1nh gi\u00e1 to\u00e0n di\u1ec7n c\u00e1c y\u1ebfu t\u1ed1 nh\u01b0 MX records, SPF, DKIM, DMARC, blacklist status, v\u00e0 kh\u1ea3 n\u0103ng deliverability (tr\u00e1nh spam). C\u00f4ng c\u1ee5 n\u00e0y \u0111\u1eb7c bi\u1ec7t d\u1ec5 d\u00f9ng, ch\u1ec9 c\u1ea7n g\u1eedi m\u1ed9t email test \u0111\u1ec3 nh\u1eadn b\u00e1o c\u00e1o chi ti\u1ebft. D\u01b0\u1edbi \u0111\u00e2y l\u00e0 h\u01b0\u1edbng d\u1eabn t\u1eebng b\u01b0\u1edbc, d\u1ef1a tr\u00ean th\u00f4ng tin c\u1eadp nh\u1eadt t\u1eeb mail-tester.com v\u00e0 c\u00e1c ngu\u1ed3n \u0111\u00e1ng tin c\u1eady (2025).<\/p>\n<h3 dir=\"auto\">2. H\u01b0\u1edbng d\u1eabn chi ti\u1ebft s\u1eed d\u1ee5ng Mail-Tester<\/h3>\n<p>2.1. Truy c\u1eadp Mail-Tester v\u00e0 l\u1ea5y \u0111\u1ecba ch\u1ec9 email test<\/p>\n<ul>\n<li><strong>B\u01b0\u1edbc 1<\/strong>: M\u1edf tr\u00ecnh duy\u1ec7t v\u00e0 truy c\u1eadp <a href=\"https:\/\/www.mail-tester.com\/\" target=\"_blank\" rel=\"noopener noreferrer nofollow\">mail-tester.com<\/a>.<\/li>\n<li><strong>B\u01b0\u1edbc 2<\/strong>: Trang ch\u1ee7 s\u1ebd hi\u1ec3n th\u1ecb m\u1ed9t \u0111\u1ecba ch\u1ec9 email test t\u1ea1m th\u1eddi, v\u00ed d\u1ee5: test-xyz123@mail-tester.com. \u0110\u1ecba ch\u1ec9 n\u00e0y thay \u0111\u1ed5i m\u1ed7i l\u1ea7n refresh trang.<\/li>\n<li><strong>B\u01b0\u1edbc 3<\/strong>: Copy \u0111\u1ecba ch\u1ec9 email test n\u00e0y (ho\u1eb7c ghi l\u1ea1i).<\/li>\n<\/ul>\n<p dir=\"auto\"><strong>L\u01b0u \u00fd<\/strong>:<\/p>\n<ul dir=\"auto\">\n<li>Kh\u00f4ng c\u1ea7n \u0111\u0103ng k\u00fd t\u00e0i kho\u1ea3n, kh\u00f4ng c\u1ea7n nh\u1eadp domain tr\u01b0\u1edbc.<\/li>\n<li>\u0110\u1ecba ch\u1ec9 test ch\u1ec9 ho\u1ea1t \u0111\u1ed9ng trong v\u00e0i gi\u1edd, v\u00ec v\u1eady h\u00e3y th\u1ef1c hi\u1ec7n ngay.<\/li>\n<\/ul>\n<p>2.2. G\u1eedi email test t\u1eeb domain c\u1ee7a b\u1ea1n<\/p>\n<ul>\n<li><strong>B\u01b0\u1edbc 1<\/strong>: M\u1edf email client (nh\u01b0 Gmail, Outlook, ho\u1eb7c mail server c\u1ee7a b\u1ea1n) v\u00e0 s\u1eed d\u1ee5ng m\u1ed9t \u0111\u1ecba ch\u1ec9 email t\u1eeb domain c\u1ea7n ki\u1ec3m tra, v\u00ed d\u1ee5: finnbalor@banana-pancakes.com.<\/li>\n<li><strong>B\u01b0\u1edbc 2<\/strong>: So\u1ea1n email m\u1edbi:\n<ul dir=\"auto\">\n<li><strong>To<\/strong>: D\u00e1n \u0111\u1ecba ch\u1ec9 test t\u1eeb Mail-Tester (v\u00ed d\u1ee5: test-xyz123@mail-tester.com).<\/li>\n<li><strong>Subject<\/strong>: B\u1ea5t k\u1ef3 (v\u00ed d\u1ee5: &#8220;Test Email&#8221;).<\/li>\n<li><strong>Body<\/strong>: C\u00f3 th\u1ec3 \u0111\u1ec3 tr\u1ed1ng ho\u1eb7c th\u00eam n\u1ed9i dung ng\u1eafn (kh\u00f4ng c\u1ea7n ph\u1ee9c t\u1ea1p).<\/li>\n<\/ul>\n<\/li>\n<li><strong>B\u01b0\u1edbc 3<\/strong>: G\u1eedi email.<\/li>\n<li><strong>L\u01b0u \u00fd<\/strong>:\n<ul dir=\"auto\">\n<li>G\u1eedi t\u1eeb \u0111\u00fang email c\u1ee7a domain (nh\u01b0 ricflair@banana-pancakes.com) \u0111\u1ec3 ki\u1ec3m tra c\u1ea5u h\u00ecnh server li\u00ean quan.<\/li>\n<li>N\u1ebfu g\u1eedi email marketing, n\u00ean d\u00f9ng n\u1ed9i dung th\u1eadt \u0111\u1ec3 test spam score ch\u00ednh x\u00e1c.<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<p>2.3. Xem b\u00e1o c\u00e1o tr\u00ean Mail-Tester<\/p>\n<ul>\n<li><strong>B\u01b0\u1edbc 1<\/strong>: Quay l\u1ea1i trang <a href=\"https:\/\/www.mail-tester.com\/\" target=\"_blank\" rel=\"noopener noreferrer nofollow\">mail-tester.com<\/a> v\u00e0 click <strong>Check your score<\/strong> (ho\u1eb7c refresh trang n\u1ebfu \u0111\u00e3 hi\u1ec3n th\u1ecb n\u00fat).<\/li>\n<li><strong>B\u01b0\u1edbc 2<\/strong>: Xem \u0111i\u1ec3m s\u1ed1 t\u1ed5ng quan (t\u1eeb 0 \u0111\u1ebfn 10):\n<ul dir=\"auto\">\n<li><strong>8-10<\/strong>: Email kh\u1ecfe, \u00edt kh\u1ea3 n\u0103ng v\u00e0o spam.<\/li>\n<li><strong>6-7<\/strong>: C\u00f3 v\u1ea5n \u0111\u1ec1 nh\u1ecf, c\u1ea7n t\u1ed1i \u01b0u.<\/li>\n<li><strong>D\u01b0\u1edbi 6<\/strong>: C\u00f3 l\u1ed7i nghi\u00eam tr\u1ecdng (blacklist, thi\u1ebfu authentication, v.v.).<\/li>\n<\/ul>\n<\/li>\n<li><strong>B\u01b0\u1edbc 3<\/strong>: Cu\u1ed9n xu\u1ed1ng \u0111\u1ec3 xem b\u00e1o c\u00e1o chi ti\u1ebft<\/li>\n<\/ul>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"size-full wp-image-8142 aligncenter\" src=\"https:\/\/longvan.net\/cong-dong\/wp-content\/uploads\/2025\/10\/z7083557694728_cc488f363f0c4e2db9d4a860be6e79a2.jpg\" alt=\"\" width=\"1146\" height=\"913\" srcset=\"https:\/\/longvan.net\/cong-dong\/wp-content\/uploads\/2025\/10\/z7083557694728_cc488f363f0c4e2db9d4a860be6e79a2.jpg 1146w, https:\/\/longvan.net\/cong-dong\/wp-content\/uploads\/2025\/10\/z7083557694728_cc488f363f0c4e2db9d4a860be6e79a2-300x239.jpg 300w, https:\/\/longvan.net\/cong-dong\/wp-content\/uploads\/2025\/10\/z7083557694728_cc488f363f0c4e2db9d4a860be6e79a2-1024x816.jpg 1024w, https:\/\/longvan.net\/cong-dong\/wp-content\/uploads\/2025\/10\/z7083557694728_cc488f363f0c4e2db9d4a860be6e79a2-768x612.jpg 768w\" sizes=\"auto, (max-width: 1146px) 100vw, 1146px\" \/><\/p>\n<h3>3. H\u01b0\u1edbng d\u1eabn xem b\u00e1o c\u00e1o chi ti\u1ebft\u1eeb Mail-Tester<\/h3>\n<p dir=\"auto\">Mail-Tester cung c\u1ea5p b\u00e1o c\u00e1o chia th\u00e0nh c\u00e1c ph\u1ea7n c\u1ee5 th\u1ec3, gi\u00fap b\u1ea1n x\u00e1c \u0111\u1ecbnh v\u1ea5n \u0111\u1ec1 v\u1edbi domain email. D\u01b0\u1edbi \u0111\u00e2y l\u00e0 c\u00e1c th\u00e0nh ph\u1ea7n ch\u00ednh v\u00e0 c\u00e1ch \u0111\u1ecdc:<\/p>\n<ul>\n<li><strong>Th\u00f4ng tin email nh\u1eadn \u0111\u01b0\u1ee3c (Email Details)\n<p><img loading=\"lazy\" decoding=\"async\" class=\"size-full wp-image-8143 aligncenter\" src=\"https:\/\/longvan.net\/cong-dong\/wp-content\/uploads\/2025\/10\/MailTester1.jpg\" alt=\"\" width=\"1115\" height=\"415\" srcset=\"https:\/\/longvan.net\/cong-dong\/wp-content\/uploads\/2025\/10\/MailTester1.jpg 1115w, https:\/\/longvan.net\/cong-dong\/wp-content\/uploads\/2025\/10\/MailTester1-300x112.jpg 300w, https:\/\/longvan.net\/cong-dong\/wp-content\/uploads\/2025\/10\/MailTester1-1024x381.jpg 1024w, https:\/\/longvan.net\/cong-dong\/wp-content\/uploads\/2025\/10\/MailTester1-768x286.jpg 768w\" sizes=\"auto, (max-width: 1115px) 100vw, 1115px\" \/><br \/>\n<\/strong><\/p>\n<ul>\n<li><strong>N\u1ed9i dung hi\u1ec3n th\u1ecb<\/strong>:\n<ul>\n<li><strong>Subject<\/strong>: Ti\u00eau \u0111\u1ec1 email (v\u00ed d\u1ee5: &#8220;Test Email&#8221;).<\/li>\n<li><strong>From<\/strong>: \u0110\u1ecba ch\u1ec9 g\u1eedi (v\u00ed d\u1ee5: Tr\u1ea7n V\u0103n &lt;vantan@longvan.net&gt;).<\/li>\n<li><strong>Bounce Address<\/strong>: \u0110\u1ecba ch\u1ec9 tr\u1ea3 v\u1ec1 (gi\u00fap x\u1eed l\u00fd email kh\u00f4ng g\u1eedi \u0111\u01b0\u1ee3c).<\/li>\n<li><strong>Reply-To<\/strong>: \u0110\u1ecba ch\u1ec9 ph\u1ea3n h\u1ed3i.<\/li>\n<li><strong>HTML version<\/strong>: N\u1ed9i dung HTML (v\u1edbi\/without external images).<\/li>\n<li><strong>Text version<\/strong>: N\u1ed9i dung v\u0103n b\u1ea3n thu\u1ea7n.<\/li>\n<li><strong>Source<\/strong>: Header email (chi ti\u1ebft k\u1ef9 thu\u1eadt).<\/li>\n<\/ul>\n<\/li>\n<li><strong>C\u00e1ch \u0111\u1ecdc<\/strong>:\n<ul>\n<li>Icon <strong>xanh (\u2714)<\/strong>: Email g\u1eedi\/nh\u1eadn th\u00e0nh c\u00f4ng, \u0111\u1ecbnh d\u1ea1ng hi\u1ec3n th\u1ecb t\u1ed1t.<\/li>\n<li>Icon <strong>cam (\u26a0)<\/strong> ho\u1eb7c <strong>\u0111\u1ecf (\u2716)<\/strong>: C\u00f3 l\u1ed7i (hi\u1ebfm), nh\u01b0 server kh\u00f4ng ph\u1ea3n h\u1ed3i.<\/li>\n<\/ul>\n<\/li>\n<li><strong>Tr\u01b0\u1eddng h\u1ee3p nh\u01b0 v\u00ed d\u1ee5<\/strong>: Pass ho\u00e0n to\u00e0n (xanh), ngh\u0129a l\u00e0 server email v\u00e0 \u0111\u1ecbnh d\u1ea1ng \u1ed5n.<\/li>\n<li><strong>C\u00e1ch kh\u1eafc ph\u1ee5c n\u1ebfu c\u00f3 v\u1ea5n \u0111\u1ec1<\/strong>: N\u1ebfu c\u00f3 v\u1ea5n \u0111\u1ec1, ki\u1ec3m tra &#8220;Source&#8221; \u0111\u1ec3 xem header (t\u00f4i c\u00f3 th\u1ec3 gi\u00fap ph\u00e2n t\u00edch n\u1ebfu b\u1ea1n cung c\u1ea5p).<\/li>\n<\/ul>\n<\/li>\n<li dir=\"auto\"><strong>SpamAssassin likes you<\/strong> (Ki\u1ec3m tra n\u1ed9i dung ch\u1ed1ng spam)\n<p><img loading=\"lazy\" decoding=\"async\" class=\"size-full wp-image-8144 aligncenter\" src=\"https:\/\/longvan.net\/cong-dong\/wp-content\/uploads\/2025\/10\/MailTester2.jpg\" alt=\"\" width=\"1116\" height=\"760\" srcset=\"https:\/\/longvan.net\/cong-dong\/wp-content\/uploads\/2025\/10\/MailTester2.jpg 1116w, https:\/\/longvan.net\/cong-dong\/wp-content\/uploads\/2025\/10\/MailTester2-300x204.jpg 300w, https:\/\/longvan.net\/cong-dong\/wp-content\/uploads\/2025\/10\/MailTester2-1024x697.jpg 1024w, https:\/\/longvan.net\/cong-dong\/wp-content\/uploads\/2025\/10\/MailTester2-768x523.jpg 768w\" sizes=\"auto, (max-width: 1116px) 100vw, 1116px\" \/><\/p>\n<ul>\n<li><strong>C\u00e1ch \u0111\u1ecdc<\/strong>:\n<ul>\n<li><strong>Xanh (\u2714)<\/strong>: N\u1ed9i dung kh\u00f4ng ch\u1ee9a t\u1eeb kh\u00f3a spam (nh\u01b0 &#8220;FREE&#8221;, &#8220;WIN&#8221;) ho\u1eb7c c\u1ea5u tr\u00fac \u0111\u00e1ng ng\u1edd.<\/li>\n<li><strong>\u0110\u1ecf (\u2716)<\/strong>: N\u1ed9i dung c\u00f3 nguy c\u01a1 spam cao (\u0111i\u1ec3m th\u1ea5p d\u01b0\u1edbi 6\/10).<\/li>\n<\/ul>\n<\/li>\n<li><strong>Tr\u01b0\u1eddng h\u1ee3p c\u1ee7a b\u1ea1n<\/strong>: Pass (xanh), email test \u0111\u01a1n gi\u1ea3n kh\u00f4ng k\u00edch ho\u1ea1t quy t\u1eafc spam.<\/li>\n<li><strong>C\u00e1ch kh\u1eafc ph\u1ee5c n\u1ebfu c\u00f3 v\u1ea5n \u0111\u1ec1<\/strong>: N\u1ebfu fail, tr\u00e1nh t\u1eeb ng\u1eef spam, ki\u1ec3m tra l\u1ea1i n\u1ed9i dung (v\u00ed d\u1ee5: th\u00eam link unsubscribe n\u1ebfu g\u1eedi marketing).<\/li>\n<\/ul>\n<\/li>\n<li dir=\"auto\"><strong>You&#8217;re not fully authenticated<\/strong> (X\u00e1c th\u1ef1c email \u2013 SPF\/DKIM\/DMARC)<br \/>\n<img loading=\"lazy\" decoding=\"async\" class=\"size-full wp-image-8145 aligncenter\" src=\"https:\/\/longvan.net\/cong-dong\/wp-content\/uploads\/2025\/10\/MailTester3.jpg\" alt=\"\" width=\"1096\" height=\"942\" srcset=\"https:\/\/longvan.net\/cong-dong\/wp-content\/uploads\/2025\/10\/MailTester3.jpg 1096w, https:\/\/longvan.net\/cong-dong\/wp-content\/uploads\/2025\/10\/MailTester3-300x258.jpg 300w, https:\/\/longvan.net\/cong-dong\/wp-content\/uploads\/2025\/10\/MailTester3-1024x880.jpg 1024w, https:\/\/longvan.net\/cong-dong\/wp-content\/uploads\/2025\/10\/MailTester3-768x660.jpg 768w\" sizes=\"auto, (max-width: 1096px) 100vw, 1096px\" \/><\/p>\n<ul>\n<li><strong>C\u00e1ch \u0111\u1ecdc<\/strong>:\n<ul>\n<li><strong>Xanh (\u2714)<\/strong>: SPF, DKIM, v\u00e0 DMARC \u0111\u1ec1u pass ho\u00e0n to\u00e0n (alignment t\u1ed1t).<\/li>\n<li><strong>Cam (\u26a0)<\/strong>: M\u1ed9t ho\u1eb7c nhi\u1ec1u y\u1ebfu t\u1ed1 (SPF, DKIM, DMARC) kh\u00f4ng ho\u00e0n thi\u1ec7n (partial pass ho\u1eb7c fail).<\/li>\n<li><strong>\u0110\u1ecf (\u2716)<\/strong>: Thi\u1ebfu ho\u00e0n to\u00e0n authentication.<\/li>\n<\/ul>\n<\/li>\n<li><strong>Chi ti\u1ebft<\/strong>:\n<ul dir=\"auto\">\n<li><strong>SPF<\/strong>: X\u00e1c nh\u1eadn server g\u1eedi \u0111\u01b0\u1ee3c ph\u00e9p (qua DNS TXT record).<\/li>\n<li><strong>DKIM<\/strong>: Ki\u1ec3m tra ch\u1eef k\u00fd s\u1ed1 (qua DNS TXT v\u1edbi selector).<\/li>\n<li><strong>DMARC<\/strong>: Ki\u1ec3m tra ch\u00ednh s\u00e1ch (none\/quarantine\/reject) v\u00e0 alignment.<\/li>\n<\/ul>\n<\/li>\n<li><strong>Tr\u01b0\u1eddng h\u1ee3p c\u1ee7a b\u1ea1n<\/strong>: C\u1ea3nh b\u00e1o cam, ngh\u0129a l\u00e0 authentication ch\u01b0a ho\u00e0n h\u1ea3o (c\u00f3 th\u1ec3 DMARC ch\u1ec9 p=none ho\u1eb7c DKIM kh\u00f4ng align).<\/li>\n<li><strong>C\u00e1ch kh\u1eafc ph\u1ee5c n\u1ebfu c\u00f3 v\u1ea5n \u0111\u1ec1<\/strong>:\n<ul>\n<li>Ki\u1ec3m tra DNS c\u1ee7a longvan.net qua <a href=\"https:\/\/dnschecker.org\/\" target=\"_blank\" rel=\"noopener noreferrer nofollow\">DNS Checker<\/a> \u0111\u1ec3 xem TXT records.<\/li>\n<li>N\u1ebfu thi\u1ebfu DMARC, th\u00eam: _dmarc.longvan.net TXT v=DMARC1; p=quarantine; rua=mailto:dmarc@longvan.net;.<\/li>\n<li>Ch\u1edd 24-48 gi\u1edd (DNS propagation), test l\u1ea1i.<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<\/li>\n<li><strong>Your message could be improved<\/strong> (C\u1ea3i thi\u1ec7n n\u1ed9i dung email)<br \/>\n<img loading=\"lazy\" decoding=\"async\" class=\"size-full wp-image-8146 aligncenter\" src=\"https:\/\/longvan.net\/cong-dong\/wp-content\/uploads\/2025\/10\/MailTester4.jpg\" alt=\"\" width=\"1111\" height=\"482\" srcset=\"https:\/\/longvan.net\/cong-dong\/wp-content\/uploads\/2025\/10\/MailTester4.jpg 1111w, https:\/\/longvan.net\/cong-dong\/wp-content\/uploads\/2025\/10\/MailTester4-300x130.jpg 300w, https:\/\/longvan.net\/cong-dong\/wp-content\/uploads\/2025\/10\/MailTester4-1024x444.jpg 1024w, https:\/\/longvan.net\/cong-dong\/wp-content\/uploads\/2025\/10\/MailTester4-768x333.jpg 768w\" sizes=\"auto, (max-width: 1111px) 100vw, 1111px\" \/><\/p>\n<ul>\n<li><strong>C\u00e1ch \u0111\u1ecdc<\/strong>:\n<ul>\n<li><strong>Cam (\u26a0)<\/strong>: G\u1ee3i \u00fd t\u1ed1i \u01b0u (thi\u1ebfu unsubscribe link, HTML kh\u00f4ng responsive, v.v.).<\/li>\n<li><strong>Xanh (\u2714)<\/strong>: \u0110\u00e3 t\u1ed1i \u01b0u ho\u00e0n h\u1ea3o (hi\u1ebfm).<\/li>\n<\/ul>\n<\/li>\n<li><strong>Tr\u01b0\u1eddng h\u1ee3p c\u1ee7a b\u1ea1n<\/strong>: C\u1ea3nh b\u00e1o cam, c\u00f3 th\u1ec3 do thi\u1ebfu footer marketing ho\u1eb7c HTML c\u1ea7n tinh ch\u1ec9nh.<\/li>\n<li><strong>C\u00e1ch kh\u1eafc ph\u1ee5c n\u1ebfu c\u00f3 v\u1ea5n \u0111\u1ec1<\/strong>:\n<ul>\n<li>Th\u00eam unsubscribe link n\u1ebfu g\u1eedi email marketing.<\/li>\n<li>\u0110\u1ea3m b\u1ea3o HTML clean (\u00edt h\u00ecnh \u1ea3nh, responsive).<\/li>\n<li>Test l\u1ea1i v\u1edbi n\u1ed9i dung ph\u1ee9c t\u1ea1p h\u01a1n.<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<\/li>\n<li dir=\"auto\"><strong>You&#8217;re not blacklisted<\/strong> (Ki\u1ec3m tra blacklist)<br \/>\n<img loading=\"lazy\" decoding=\"async\" class=\"size-full wp-image-8147 aligncenter\" src=\"https:\/\/longvan.net\/cong-dong\/wp-content\/uploads\/2025\/10\/MailTester5.jpg\" alt=\"\" width=\"1120\" height=\"401\" srcset=\"https:\/\/longvan.net\/cong-dong\/wp-content\/uploads\/2025\/10\/MailTester5.jpg 1120w, https:\/\/longvan.net\/cong-dong\/wp-content\/uploads\/2025\/10\/MailTester5-300x107.jpg 300w, https:\/\/longvan.net\/cong-dong\/wp-content\/uploads\/2025\/10\/MailTester5-1024x367.jpg 1024w, https:\/\/longvan.net\/cong-dong\/wp-content\/uploads\/2025\/10\/MailTester5-768x275.jpg 768w\" sizes=\"auto, (max-width: 1120px) 100vw, 1120px\" \/><\/p>\n<ul>\n<li><strong>C\u00e1ch \u0111\u1ecdc<\/strong>:\n<ul>\n<li><strong>Xanh (\u2714)<\/strong>: Domain\/IP mail server kh\u00f4ng n\u1eb1m trong 100+ blacklist (nh\u01b0 Spamhaus, Barracuda).<\/li>\n<li><strong>\u0110\u1ecf (\u2716)<\/strong>: B\u1ecb li\u1ec7t k\u00ea, k\u00e8m link delist.<\/li>\n<\/ul>\n<\/li>\n<li><strong>Tr\u01b0\u1eddng h\u1ee3p c\u1ee7a b\u1ea1n<\/strong>: Pass (xanh), domain longvan.net s\u1ea1ch.<\/li>\n<li><strong>C\u00e1ch kh\u1eafc ph\u1ee5c n\u1ebfu c\u00f3 v\u1ea5n \u0111\u1ec1<\/strong>: Ki\u1ec3m tra \u0111\u1ecbnh k\u1ef3 b\u1eb1ng <a href=\"https:\/\/www.spamhaus.org\/lookup\/\" target=\"_blank\" rel=\"noopener noreferrer nofollow\">Spamhaus Lookup<\/a> \u0111\u1ec3 duy tr\u00ec.<\/li>\n<\/ul>\n<\/li>\n<li dir=\"auto\"><strong>No broken links<\/strong> (Ki\u1ec3m tra link h\u1ecfng)\n<ul>\n<li><strong>C\u00e1ch \u0111\u1ecdc<\/strong>:\n<ul>\n<li><strong>Xanh (\u2714)<\/strong>: Kh\u00f4ng c\u00f3 link h\u1ecfng (an to\u00e0n, kh\u00f4ng g\u00e2y nghi ng\u1edd spam).<\/li>\n<li><strong>\u0110\u1ecf (\u2716)<\/strong>: C\u00f3 link kh\u00f4ng ho\u1ea1t \u0111\u1ed9ng.<\/li>\n<\/ul>\n<\/li>\n<li><strong>Tr\u01b0\u1eddng h\u1ee3p trong \u1ea3nh<\/strong>: Pass (xanh), kh\u00f4ng c\u00f3 link g\u1eb7p v\u1ea5n \u0111\u1ec1 ho\u1eb7c link \u1ed5n.<\/li>\n<li><strong>C\u00e1ch kh\u1eafc ph\u1ee5c n\u1ebfu c\u00f3 v\u1ea5n \u0111\u1ec1<\/strong>: N\u1ebfu fail, ki\u1ec3m tra v\u00e0 s\u1eeda link trong email.<\/li>\n<\/ul>\n<\/li>\n<li dir=\"auto\"><strong>T\u1ed5ng \u0111i\u1ec3m (Your lovely total: X\/10)<br \/>\n<img loading=\"lazy\" decoding=\"async\" class=\"size-full wp-image-8148 aligncenter\" src=\"https:\/\/longvan.net\/cong-dong\/wp-content\/uploads\/2025\/10\/MailTester6.jpg\" alt=\"\" width=\"833\" height=\"152\" srcset=\"https:\/\/longvan.net\/cong-dong\/wp-content\/uploads\/2025\/10\/MailTester6.jpg 833w, https:\/\/longvan.net\/cong-dong\/wp-content\/uploads\/2025\/10\/MailTester6-300x55.jpg 300w, https:\/\/longvan.net\/cong-dong\/wp-content\/uploads\/2025\/10\/MailTester6-768x140.jpg 768w\" sizes=\"auto, (max-width: 833px) 100vw, 833px\" \/><br \/>\n<\/strong><\/p>\n<ul>\n<li><strong>C\u00e1ch \u0111\u1ecdc<\/strong>:\n<ul>\n<li><strong>8-10<\/strong>: R\u1ea5t t\u1ed1t, \u00edt kh\u1ea3 n\u0103ng spam (nh\u01b0 10\/10 c\u1ee7a b\u1ea1n).<\/li>\n<li><strong>6-7<\/strong>: Ch\u1ea5p nh\u1eadn \u0111\u01b0\u1ee3c, c\u1ea7n c\u1ea3i thi\u1ec7n.<\/li>\n<li><strong>D\u01b0\u1edbi 6<\/strong>: C\u00f3 v\u1ea5n \u0111\u1ec1 nghi\u00eam tr\u1ecdng (blacklist, thi\u1ebfu authentication).<\/li>\n<\/ul>\n<\/li>\n<li><strong>Tr\u01b0\u1eddng h\u1ee3p c\u1ee7a b\u1ea1n<\/strong>: 10\/10 (ho\u00e0n h\u1ea3o), d\u00f9 c\u00f3 2 c\u1ea3nh b\u00e1o cam kh\u00f4ng \u1ea3nh h\u01b0\u1edfng l\u1edbn.<\/li>\n<li><strong>C\u00e1ch kh\u1eafc ph\u1ee5c n\u1ebfu c\u00f3 v\u1ea5n \u0111\u1ec1<\/strong>: T\u1eadp trung s\u1eeda nh\u1eefng m\u1ee5c cam \u0111\u1ec3 \u0111\u1ea1t &#8220;full green&#8221; n\u1ebfu mu\u1ed1n t\u1ed1i \u01b0u h\u01a1n.<\/li>\n<\/ul>\n<\/li>\n<li dir=\"auto\"><strong>Link b\u00e1o c\u00e1o (Test URL)<br \/>\n<img loading=\"lazy\" decoding=\"async\" class=\"alignleft size-full wp-image-8149\" src=\"https:\/\/longvan.net\/cong-dong\/wp-content\/uploads\/2025\/10\/MailTester7.jpg\" alt=\"\" width=\"1318\" height=\"158\" srcset=\"https:\/\/longvan.net\/cong-dong\/wp-content\/uploads\/2025\/10\/MailTester7.jpg 1318w, https:\/\/longvan.net\/cong-dong\/wp-content\/uploads\/2025\/10\/MailTester7-300x36.jpg 300w, https:\/\/longvan.net\/cong-dong\/wp-content\/uploads\/2025\/10\/MailTester7-1024x123.jpg 1024w, https:\/\/longvan.net\/cong-dong\/wp-content\/uploads\/2025\/10\/MailTester7-768x92.jpg 768w\" sizes=\"auto, (max-width: 1318px) 100vw, 1318px\" \/><br \/>\n<\/strong><\/p>\n<ul>\n<li><strong>C\u00e1ch \u0111\u1ecdc<\/strong>: Link nh\u01b0 https:\/\/www.mail-tester.com\/test-uvdv4p (l\u01b0u 7 ng\u00e0y).<\/li>\n<li><strong>Tr\u01b0\u1eddng h\u1ee3p c\u1ee7a b\u1ea1n<\/strong>: C\u00f3 link b\u00e1o c\u00e1o, b\u1ea1n c\u00f3 th\u1ec3 quay l\u1ea1i ho\u1eb7c chia s\u1ebb.<\/li>\n<li><strong>C\u00e1ch kh\u1eafc ph\u1ee5c n\u1ebfu c\u00f3 v\u1ea5n \u0111\u1ec1<\/strong>: L\u01b0u \u1ea3nh ch\u1ee5p m\u00e0n h\u00ecnh ho\u1eb7c header \u0111\u1ec3 tham kh\u1ea3o l\u00e2u d\u00e0i.<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<h3 dir=\"auto\">L\u01b0u \u00fd khi \u0111\u1ecdc b\u00e1o c\u00e1o<\/h3>\n<ul dir=\"auto\">\n<li><strong>M\u00e0u s\u1eafc<\/strong>: Xanh (pass), Cam (c\u1ea3nh b\u00e1o), \u0110\u1ecf (fail) \u2013 \u01b0u ti\u00ean s\u1eeda \u0111\u1ecf\/cam.<\/li>\n<li><strong>Header (Source)<\/strong>: N\u1ebfu c\u1ea7n ph\u00e2n t\u00edch s\u00e2u (nh\u01b0 l\u1ed7i authentication), copy header v\u00e0 g\u1eedi t\u00f4i.<\/li>\n<li><strong>Th\u1eddi gian<\/strong>: DNS thay \u0111\u1ed5i m\u1ea5t 24-48 gi\u1edd, ki\u00ean nh\u1eabn khi test l\u1ea1i.<\/li>\n<\/ul>\n","protected":false},"excerpt":{"rendered":"<p>1. Mail-Tester l\u00e0 g\u00ec? Mail-Tester l\u00e0 m\u1ed9t c\u00f4ng c\u1ee5 ki\u1ec3m tra s\u1ee9c kh\u1ecfe email (email health check) mi\u1ec5n ph\u00ed, tr\u1ef1c tuy\u1ebfn, kh\u00f4ng y\u00eau c\u1ea7u \u0111\u0103ng k\u00fd, r\u1ea5t ph\u00f9 h\u1ee3p \u0111\u1ec3 ki\u1ec3m tra domain email nh\u01b0 banana-pancakes.com (t\u1eeb t\u00e0i li\u1ec7u b\u1ea1n cung c\u1ea5p). N\u00f3 \u0111\u00e1nh gi\u00e1 to\u00e0n di\u1ec7n c\u00e1c y\u1ebfu t\u1ed1 nh\u01b0 MX records, SPF, DKIM, [&hellip;]<\/p>\n","protected":false},"author":6,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_oasis_is_in_workflow":0,"_oasis_original":0,"footnotes":""},"categories":[20],"tags":[],"class_list":["post-8141","post","type-post","status-publish","format-standard","hentry","category-mail-hosting"],"_links":{"self":[{"href":"https:\/\/longvan.net\/cong-dong\/wp-json\/wp\/v2\/posts\/8141","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/longvan.net\/cong-dong\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/longvan.net\/cong-dong\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/longvan.net\/cong-dong\/wp-json\/wp\/v2\/users\/6"}],"replies":[{"embeddable":true,"href":"https:\/\/longvan.net\/cong-dong\/wp-json\/wp\/v2\/comments?post=8141"}],"version-history":[{"count":1,"href":"https:\/\/longvan.net\/cong-dong\/wp-json\/wp\/v2\/posts\/8141\/revisions"}],"predecessor-version":[{"id":8150,"href":"https:\/\/longvan.net\/cong-dong\/wp-json\/wp\/v2\/posts\/8141\/revisions\/8150"}],"wp:attachment":[{"href":"https:\/\/longvan.net\/cong-dong\/wp-json\/wp\/v2\/media?parent=8141"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/longvan.net\/cong-dong\/wp-json\/wp\/v2\/categories?post=8141"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/longvan.net\/cong-dong\/wp-json\/wp\/v2\/tags?post=8141"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}