{"id":991,"date":"2020-12-11T16:03:24","date_gmt":"2020-12-11T09:03:24","guid":{"rendered":"http:\/\/blog.iwayvietnam.com\/tuanta\/?p=991"},"modified":"2020-12-18T13:50:53","modified_gmt":"2020-12-18T06:50:53","slug":"mot-so-luu-y-quan-trong-ve-ip-va-domain-trong-email-deliverability","status":"publish","type":"post","link":"https:\/\/blog.iwayvietnam.com\/tuanta\/2020\/12\/mot-so-luu-y-quan-trong-ve-ip-va-domain-trong-email-deliverability\/","title":{"rendered":"Email Deliverability part 1: IP v\u00e0 Domain"},"content":{"rendered":"<p>Nh\u01b0 \u0111\u00e3 h\u1eb9n, sau \u0111\u1ee3t h\u1ed7 tr\u1ee3 \u0111\u1ed3ng b\u00e0o mi\u1ec1n Trung t\u1ea1m \u1ed5n, t\u1edb b\u1eaft \u0111\u1ea7u quay l\u1ea1i v\u1edbi series b\u00e0i vi\u1ebft v\u1ec1 Email Deliverability.<\/p>\n<p>Email Deliverability l\u00e0 kh\u1ea3 n\u0103ng h\u1ec7 th\u1ed1ng deliver email t\u1edbi \u0111\u01b0\u1ee3c Inbox ng\u01b0\u1eddi nh\u1eadn, gi\u1ed1ng nh\u01b0 ki\u1ec3u anh shipper chuy\u1ec3n \u0111\u01b0\u1ee3c h\u00e0ng \u0111\u1ebfn t\u1eadn tay b\u1ea1n.<\/p>\n<p>\u0110\u00e2y l\u00e0 b\u00e0i \u0111\u1ea7u ti\u00ean trong tuy\u1ebfn b\u00e0i, n\u00f3i v\u1ec1 m\u1ed9t trong c\u00e1c th\u00e0nh ph\u1ea7n c\u01a1 b\u1ea3n nh\u1ea5t, v\u00e0 c\u0169ng l\u00e0 th\u00e0nh ph\u1ea7n quan tr\u1ecdng nh\u1ea5t: Ngu\u1ed3n G\u1eedi.<\/p>\n<p>M\u1eddi m\u1ecdi ng\u01b0\u1eddi \u0111\u1ecdc &amp; comment &amp; trao \u0111\u1ed5i th\u00eam.<\/p>\n<p style=\"text-align: right;\"><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter wp-image-994\" src=\"http:\/\/blog.iwayvietnam.com\/tuanta\/files\/2020\/12\/deliverability-sender-reputation_BigMailer-1024x512.png\" alt=\"\" width=\"500\" height=\"250\" srcset=\"https:\/\/blog.iwayvietnam.com\/tuanta\/files\/2020\/12\/deliverability-sender-reputation_BigMailer-1024x512.png 1024w, https:\/\/blog.iwayvietnam.com\/tuanta\/files\/2020\/12\/deliverability-sender-reputation_BigMailer-300x150.png 300w, https:\/\/blog.iwayvietnam.com\/tuanta\/files\/2020\/12\/deliverability-sender-reputation_BigMailer-768x384.png 768w, https:\/\/blog.iwayvietnam.com\/tuanta\/files\/2020\/12\/deliverability-sender-reputation_BigMailer-816x408.png 816w, https:\/\/blog.iwayvietnam.com\/tuanta\/files\/2020\/12\/deliverability-sender-reputation_BigMailer.png 1200w\" sizes=\"(max-width: 500px) 100vw, 500px\" \/><em>Ngu\u1ed3n: BigMailer<\/em><\/p>\n<p>M\u1ed9t trong c\u00e1c th\u00f4ng tin quan tr\u1ecdng nh\u1ea5t \u0111\u01b0\u1ee3c c\u00f4ng c\u1ee5 Spam filter ph\u00eda \u0111\u1ea7u h\u1ec7 th\u1ed1ng email ng\u01b0\u1eddi nh\u1eadn d\u00f9ng \u0111\u1ec3 \u0111\u00e1nh gi\u00e1 m\u1ed9t email c\u00f3 ph\u1ea3i l\u00e0 spam hay kh\u00f4ng l\u00e0 ngu\u1ed3n g\u1eedi, \u0111\u01b0\u1ee3c c\u1ea5u th\u00e0nh b\u1edfi 2 th\u00e0nh t\u1ed1: \u0111\u1ecba ch\u1ec9 IP v\u00e0 t\u00ean mi\u1ec1n.<\/p>\n<p><strong>V\u1ec1 \u0111\u1ecba ch\u1ec9 IP:<\/strong><\/p>\n<ul>\n<li>H\u1ec7 th\u1ed1ng email \u0111\u1ea7u nh\u1eadn ki\u1ec3m tra \u0111i\u1ec3m t\u00edn nhi\u1ec7m (reputation) c\u1ee7a \u0111\u1ecba ch\u1ec9 IP d\u00f9ng \u0111\u1ec3 k\u1ebft n\u1ed1i, chuy\u1ec3n ph\u00e1t th\u01b0 t\u1edbi (Sender IP) theo m\u1ed9t s\u1ed1 thu\u1eadt to\u00e1n t\u01b0\u01a1ng \u0111\u1ed1i ph\u1ee9c t\u1ea1p, k\u1ebft h\u1ee3p nhi\u1ec1u tham s\u1ed1 kh\u00e1c nhau \u0111\u1ec3 t\u00ednh to\u00e1n ra m\u1ed9t ch\u1ec9 s\u1ed1 chung g\u1ecdi l\u00e0 SenderScore c\u00f3 \u0111i\u1ec3m s\u1ed1 t\u1eeb 0-100; m\u1ed9t s\u1ed1 h\u1ec7 th\u1ed1ng s\u1eed d\u1ee5ng c\u00e1c thu\u1eadt to\u00e1n kh\u00e1c t\u00ednh to\u00e1n ra ch\u1ec9 s\u1ed1 SenderBase c\u00f3 gi\u00e1 tr\u1ecb t\u1eeb -10 \u0111\u1ebfn +10. M\u1ed9t s\u1ed1 tham s\u1ed1 ch\u00ednh c\u00f3 th\u1ec3 k\u1ec3 \u0111\u1ebfn:\n<ul>\n<li>Complaints: s\u1ed1 l\u01b0\u1ee3ng th\u00f4ng b\u00e1o \u201c\u0111\u00e2y l\u00e0 spam\u201d c\u1ee7a ng\u01b0\u1eddi d\u00f9ng (ch\u1ec9 s\u1ed1 quan tr\u1ecdng nh\u1ea5t &#8211; n\u00ean c\u1ea7n t\u00ecm c\u00e1ch gi\u1ea3m thi\u1ec3u complaints c\u1ee7a ng\u01b0\u1eddi d\u00f9ng)<\/li>\n<li>Spam Traps: m\u1ed9t lo\u1ea1i d\u1ecbch v\u1ee5 \u0111\u1eb7c bi\u1ec7t c\u1ee7a c\u00e1c nh\u00e0 cung c\u1ea5p d\u1ecbch v\u1ee5 Internet, chuy\u00ean b\u1eaby c\u00e1c lo\u1ea1i Spam kh\u00e1c nhau.<\/li>\n<li>Message Composition: c\u00e1ch th\u1ee9c thu th\u1eadp\/tr\u1ed9n th\u00f4ng tin t\u1ea1o ra n\u1ed9i dung th\u01b0 g\u1eedi \u0111i.<\/li>\n<li>Volume: s\u1ed1 l\u01b0\u1ee3ng th\u01b0 g\u1eedi \u0111i theo \u0111\u01a1n v\u1ecb th\u1eddi gian.<\/li>\n<li>Blacklists: m\u1ed9t lo\u1ea1i d\u1ecbch v\u1ee5 \u0111\u1eb7c bi\u1ec7t c\u1ee7a c\u00e1c nh\u00e0 cung c\u1ea5p d\u1ecbch v\u1ee5 Internet chuy\u00ean ki\u1ec3m tra, theo d\u00f5i v\u00e0 li\u1ec7t k\u00ea c\u00e1c \u0111\u1ecba ch\u1ec9 IP g\u1eedi spam (c\u1ed1 t\u00ecnh ho\u1eb7c c\u00f3 l\u1ed7i v\u00f4 \u00fd) v\u00e0o danh s\u00e1ch \u0111en.<\/li>\n<\/ul>\n<\/li>\n<li><em><strong>M\u1ed9t s\u1ed1 l\u01b0u \u00fd c\u1ee5 th\u1ec3:<\/strong><\/em>\n<ul>\n<li>\u0110\u1ecba ch\u1ec9 IP cho chuy\u1ec3n ph\u00e1t th\u01b0 s\u1ed1 l\u01b0\u1ee3ng l\u1edbn n\u00ean d\u00f9ng ri\u00eang, tr\u00e1nh chia s\u1ebb v\u1edbi c\u00e1c d\u1ecbch v\u1ee5 kh\u00e1c. M\u1ed7i \u0111\u1ecba ch\u1ec9 IP c\u1ea7n \u0111\u01b0\u1ee3c thi\u1ebft \u0111\u1eb7t b\u1ea3n ghi \u00e1nh x\u1ea1 ng\u01b0\u1ee3c PTR.<\/li>\n<li>C\u00e1c tham s\u1ed1 \u1ea3nh h\u01b0\u1edfng ch\u00ednh \u0111\u1ebfn IP reputation nh\u01b0 n\u00eau \u1edf tr\u00ean c\u1ea7n \u0111\u01b0\u1ee3c ki\u1ec3m so\u00e1t th\u01b0\u1eddng xuy\u00ean, \u0111\u1ea3m b\u1ea3o lu\u00f4n trong ng\u01b0\u1ee1ng gi\u00e1 tr\u1ecb cho ph\u00e9p. VD: Volume n\u00ean gi\u1eef t\u01b0\u01a1ng \u0111\u1ed1i c\u00e2n b\u1eb1ng, kh\u00f4ng n\u00ean t\u0103ng \u0111\u1ed9t ng\u1ed9t trong m\u1ed9t kho\u1ea3ng th\u1eddi gian ng\u1eafn.<\/li>\n<li>Tr\u00e1nh thay \u0111\u1ed5i \u0111\u1ecba ch\u1ec9 IP, tr\u1eeb tr\u01b0\u1eddng h\u1ee3p b\u1ea5t kh\u1ea3 kh\u00e1ng. Tr\u01b0\u1eddng h\u1ee3p th\u00eam \u0111\u1ecba ch\u1ec9 IP m\u1edbi v\u00e0o h\u1ec7 th\u1ed1ng chuy\u1ec3n ph\u00e1t th\u01b0 s\u1ed1 l\u01b0\u1ee3ng l\u1edbn, c\u1ea7n th\u00eam v\u00e0o c\u00e1c h\u00e0ng \u0111\u1ee3i ph\u1ee5, \u0111\u01b0\u1ee3c ki\u1ec3m so\u00e1t t\u1ed1c \u0111\u1ed9 chuy\u1ec3n ph\u00e1t th\u01b0, tr\u01b0\u1edbc khi \u0111\u01b0a v\u00e0o c\u00e1c h\u00e0ng \u0111\u1ee3i t\u1ed1c \u0111\u1ed9 nhanh h\u01a1n v\u00e0 cu\u1ed1i c\u00f9ng v\u00e0o h\u00e0ng \u0111\u1ee3i ch\u00ednh. H\u1ec7 th\u1ed1ng email ph\u00eda \u0111\u1ea7u nh\u1eadn g\u1ecdi k\u1ef9 thu\u1eadt n\u00e0y l\u00e0 \u201cemail throttling\u201d, chuy\u00ean d\u00f9ng \u0111\u1ec3 lo\u1ea1i tr\u1eeb c\u00e1c \u0111\u1ecba ch\u1ec9 IP m\u1edbi, th\u01b0\u1eddng \u0111\u01b0\u1ee3c c\u00e1c spammer d\u00f9ng \u0111\u1ec3 ph\u00e1t t\u00e1n spam.<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<p><strong>V\u1ec1 t\u00ean mi\u1ec1n:<\/strong><\/p>\n<ul>\n<li>T\u00ean mi\u1ec1n \u0111\u01b0\u1ee3c \u0111\u0103ng k\u00fd tr\u00ean h\u1ec7 th\u1ed1ng DNS to\u00e0n c\u1ea7u, v\u00e0 trong ph\u1ea1m vi, ng\u1eef c\u1ea3nh v\u1ec1 email, th\u01b0\u1eddng g\u1eafn li\u1ec1n v\u1edbi k\u1ef9 thu\u1eadt \u201ck\u00fd t\u00ean mi\u1ec1n\u201d (signing domain) \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng trong giao th\u1ee9c x\u00e1c th\u1ef1c t\u00ean mi\u1ec1n nh\u01b0 SPF, DKIM&#8230;<\/li>\n<li>\u0110i\u1ec3m t\u00edn nhi\u1ec7m c\u1ee7a t\u00ean mi\u1ec1n (Domain Reputation) \u0111\u01b0\u1ee3c t\u00ednh to\u00e1n t\u1eeb c\u00e1c tham s\u1ed1 ch\u00ednh sau:\n<ul>\n<li>Spam folder placement rate: s\u1ed1 email t\u1eeb t\u00ean mi\u1ec1n n\u00e0y b\u1ecb \u0111\u01b0a v\u00e0o Spam folder sau khi Spam filter \u0111\u00e1nh gi\u00e1 IP reputation v\u00e0 n\u1ed9i dung th\u01b0.<\/li>\n<li>Inbox placement rate: s\u1ed1 email t\u1eeb t\u00ean mi\u1ec1n n\u00e0y v\u00e0o Inbox.<\/li>\n<li>Complaint rate: s\u1ed1 email t\u1eeb t\u00ean mi\u1ec1n n\u00e0y b\u1ecb ng\u01b0\u1eddi d\u00f9ng \u0111\u00e1nh d\u1ea5u l\u00e0 Spam.<\/li>\n<li>\u201cThis is not spam\u201d rate: s\u1ed1 email t\u1eeb t\u00ean mi\u1ec1n n\u00e0y b\u1ecb \u0111\u01b0a v\u00e0o th\u01b0 m\u1ee5c Spam (nh\u00f3m 1) ho\u1eb7c t\u1eebng b\u1ecb \u0111\u00e1nh d\u1ea5u spam (nh\u00f3m 3), nh\u01b0ng sau \u0111\u00f3 l\u1ea1i \u0111\u01b0\u1ee3c ng\u01b0\u1eddi d\u00f9ng \u0111\u00e1nh d\u1ea5u l\u00e0 Not Spam.<\/li>\n<\/ul>\n<\/li>\n<li><em><strong>M\u1ed9t s\u1ed1 l\u01b0u \u00fd c\u1ee5 th\u1ec3:<\/strong><\/em>\n<ul>\n<li>C\u1ea7n thi\u1ebft \u0111\u1eb7t c\u00e1c b\u1ea3n ghi DNS chuy\u00ean d\u00f9ng cho c\u00e1c giao th\u1ee9c x\u00e1c th\u1ef1c t\u00ean mi\u1ec1n nh\u01b0 SPF, DKIM, DMARC. H\u1ea7u h\u1ebft c\u00e1c h\u1ec7 th\u1ed1ng email ph\u00eda \u0111\u1ea7u nh\u1eadn \u0111\u1ec1u ki\u1ec3m tra x\u00e1c th\u1ef1c xem li\u1ec7u email nh\u1eadn \u0111\u01b0\u1ee3c c\u00f3 th\u1ef1c s\u1ef1 \u0111\u01b0\u1ee3c g\u1eedi t\u1eeb t\u00ean mi\u1ec1n n\u00e0y kh\u00f4ng. Vi\u1ec7c thi\u1ebft \u0111\u1eb7t n\u00e0y c\u00f2n t\u0103ng c\u01b0\u1eddng \u0111i\u1ec3m t\u00edn nhi\u1ec7m cho t\u00ean mi\u1ec1n v\u00e0 r\u1ed9ng h\u01a1n l\u00e0 th\u01b0\u01a1ng hi\u1ec7u c\u1ee7a doanh nghi\u1ec7p, \u0111\u1ea3m b\u1ea3o nh\u1eefng ngu\u1ed3n g\u1eedi kh\u00f4ng \u0111\u01b0\u1ee3c x\u00e1c th\u1ef1c s\u1ebd b\u1ecb Spam filter ph\u00eda \u0111\u1ea7u nh\u1eadn ch\u1eb7n l\u1ea1i.<\/li>\n<li>M\u1ed9t s\u1ed1 b\u1ea3n ghi DNS c\u1ea7n \u0111\u01b0\u1ee3c thi\u1ebft \u0111\u1eb7t bao g\u1ed3m:\n<ul>\n<li>B\u1ea3n ghi SPF: <a href=\"https:\/\/en.wikipedia.org\/wiki\/Sender_Policy_Framework\">Sender Policy Framework<\/a>.<\/li>\n<li>B\u1ea3n ghi DKIM: <a href=\"https:\/\/en.wikipedia.org\/wiki\/DomainKeys_Identified_Mail\">DomainKeys Identified Mail<\/a>.<\/li>\n<li>B\u1ea3n ghi <a href=\"https:\/\/en.wikipedia.org\/wiki\/DMARC\">DMARC<\/a>: Domain-based Message Authentication, Reporting and Conformance.<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<p>C\u00e1c th\u00e0nh t\u1ed1 c\u1ea5u th\u00e0nh ngu\u1ed3n g\u1eedi (\u0111\u1ecba ch\u1ec9 IP v\u00e0 t\u00ean mi\u1ec1n) c\u1ea7n \u0111\u01b0\u1ee3c th\u01b0\u1eddng xuy\u00ean ki\u1ec3m so\u00e1t theo th\u1eddi gian th\u1ef1c, \u0111\u1ea3m b\u1ea3o lu\u00f4n duy tr\u00ec \u0111i\u1ec3m t\u00edn nhi\u1ec7m t\u1ed1t nh\u1ea5t. M\u1ed9t sai s\u00f3t nh\u1ecf c\u00f3 th\u1ec3 d\u1eabn \u0111\u1ebfn \u1ea3nh h\u01b0\u1edfng r\u1ea5t l\u1edbn \u0111\u1ebfn kh\u1ea3 n\u0103ng chuy\u1ec3n ph\u00e1t c\u1ee7a c\u1ea3 h\u1ec7 th\u1ed1ng.<\/p>\n<p>Ngo\u00e0i ngu\u1ed3n g\u1eedi, c\u00f2n nhi\u1ec1u y\u1ebfu t\u1ed1 kh\u00e1c \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn kh\u1ea3 n\u0103ng th\u01b0 \u0111\u01b0\u1ee3c deliver t\u1edbi Inbox ng\u01b0\u1eddi nh\u1eadn (email deliverability). Tuy nhi\u00ean h\u1ea7u h\u1ebft c\u00e1c y\u1ebfu t\u1ed1 \u0111\u00f3 n\u1eb1m ngo\u00e0i ph\u1ea1m vi c\u1ee7a h\u1ec7 th\u1ed1ng chuy\u1ec3n ph\u00e1t th\u01b0 s\u1ed1 l\u01b0\u1ee3ng l\u1edbn n\u00ean s\u1ebd c\u1ea7n \u0111\u01b0\u1ee3c xem x\u00e9t ri\u00eang.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Nh\u01b0 \u0111\u00e3 h\u1eb9n, sau \u0111\u1ee3t h\u1ed7 tr\u1ee3 \u0111\u1ed3ng b\u00e0o mi\u1ec1n Trung t\u1ea1m \u1ed5n, t\u1edb b\u1eaft \u0111\u1ea7u quay l\u1ea1i v\u1edbi series b\u00e0i vi\u1ebft v\u1ec1 Email Deliverability. Email Deliverability l\u00e0 kh\u1ea3 n\u0103ng h\u1ec7 th\u1ed1ng deliver email t\u1edbi \u0111\u01b0\u1ee3c Inbox ng\u01b0\u1eddi nh\u1eadn, gi\u1ed1ng nh\u01b0 ki\u1ec3u anh shipper chuy\u1ec3n \u0111\u01b0\u1ee3c h\u00e0ng \u0111\u1ebfn t\u1eadn tay b\u1ea1n. \u0110\u00e2y l\u00e0 b\u00e0i \u0111\u1ea7u<a class=\"more-link\" href=\"https:\/\/blog.iwayvietnam.com\/tuanta\/2020\/12\/mot-so-luu-y-quan-trong-ve-ip-va-domain-trong-email-deliverability\/\">Continue reading <span class=\"screen-reader-text\">&#8220;Email Deliverability part 1: IP v\u00e0 Domain&#8221;<\/span><\/a><\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[4046,34,17],"tags":[],"class_list":["post-991","post","type-post","status-publish","format-standard","hentry","category-email-deliverability","category-weekly-tips","category-zimbra","entry"],"_links":{"self":[{"href":"https:\/\/blog.iwayvietnam.com\/tuanta\/wp-json\/wp\/v2\/posts\/991"}],"collection":[{"href":"https:\/\/blog.iwayvietnam.com\/tuanta\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/blog.iwayvietnam.com\/tuanta\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/blog.iwayvietnam.com\/tuanta\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/blog.iwayvietnam.com\/tuanta\/wp-json\/wp\/v2\/comments?post=991"}],"version-history":[{"count":10,"href":"https:\/\/blog.iwayvietnam.com\/tuanta\/wp-json\/wp\/v2\/posts\/991\/revisions"}],"predecessor-version":[{"id":1004,"href":"https:\/\/blog.iwayvietnam.com\/tuanta\/wp-json\/wp\/v2\/posts\/991\/revisions\/1004"}],"wp:attachment":[{"href":"https:\/\/blog.iwayvietnam.com\/tuanta\/wp-json\/wp\/v2\/media?parent=991"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/blog.iwayvietnam.com\/tuanta\/wp-json\/wp\/v2\/categories?post=991"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/blog.iwayvietnam.com\/tuanta\/wp-json\/wp\/v2\/tags?post=991"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}