{"id":30821,"date":"2026-05-18T12:00:00","date_gmt":"2026-05-18T04:00:00","guid":{"rendered":"https:\/\/cn.hostease.com\/blog\/?p=30821"},"modified":"2026-05-17T07:15:31","modified_gmt":"2026-05-16T23:15:31","slug":"postfix-spf-dkim-dmarc-practical","status":"publish","type":"post","link":"https:\/\/cn.hostease.com\/blog\/linux\/postfix-spf-dkim-dmarc-practical\/","title":{"rendered":"Postfix \u4e0e SPF DKIM DMARC \u90ae\u4ef6\u9632\u4f2a\u5b9e\u6218"},"content":{"rendered":"<p><img decoding=\"async\" alt=\"Postfix \u4e0e SPF DKIM DMARC \u90ae\u4ef6\u9632\u4f2a\u5b9e\u6218 \u5c01\u9762\u914d\u56fe\" src=\"https:\/\/cn.hostease.com\/blog\/wp-content\/uploads\/2026\/05\/postfix-spf-dkim-dmarc-practical-cover.webp\" \/><\/p>\n<p>\u81ea\u5efa\u90ae\u4ef6\u670d\u52a1\u5668\u6700\u5bb9\u6613\u683d\u8ddf\u5934\u7684\u5730\u65b9\u4e0d\u662f\u88c5 Postfix\uff0c\u800c\u662f\u88c5\u597d\u4e4b\u540e\u53d1\u51fa\u53bb\u7684\u90ae\u4ef6\u5168\u90e8\u8fdb Gmail \u5783\u573e\u7bb1\u3002\u539f\u56e0\u51e0\u4e4e\u90fd\u4e00\u6837\uff1aSPF\u3001DKIM\u3001DMARC \u4e09\u4ef6\u5957\u6ca1\u914d\u9f50\uff0c\u6216\u8005\u914d\u9f50\u4e86\u4f46\u6ca1\u5bf9\u9f50\u3002\u672c\u6587\u6559\u4f60\u5982\u4f55\u5728\u4e00\u53f0 Linux \u670d\u52a1\u5668\u4e0a\u628a\u8fd9\u4e09\u9053\u9632\u7ebf\u90fd\u8dd1\u901a\uff0c\u8986\u76d6 DNS \u8bb0\u5f55\u5199\u6cd5\u3001OpenDKIM \u843d\u5730\u3001Postfix milter \u4e32\u8054\u3001\u5bf9\u9f50\u6392\u67e5\u4e0e\u6700\u7ec8\u7684\u53d1\u4fe1\u9a8c\u8bc1\u6d41\u7a0b\uff0c\u5e2e\u52a9\u4f60\u628a\u53d1\u4ef6\u4fe1\u8a89\u4ece\u96f6\u62c9\u5230\u4e3b\u6d41\u90ae\u7bb1\u90fd\u80fd\u76f4\u9001\u6536\u4ef6\u7bb1\u3002\u4e0b\u9762\u9ed8\u8ba4\u4f60\u5df2\u7ecf\u80fd\u767b\u4e0a\u670d\u52a1\u5668\u3001\u5bf9 DNS \u63a7\u5236\u53f0\u6709\u6539\u8bb0\u5f55\u7684\u6743\u9650\uff0c\u5bf9 Postfix \u6709\u6700\u57fa\u672c\u7684\u8ba4\u77e5\uff0c\u4e0d\u9700\u8981\u4f60\u4e4b\u524d\u771f\u6b63\u8fd0\u8425\u8fc7\u90ae\u4ef6\u670d\u52a1\u3002<\/p>\n<h2>\u4e09\u4ef6\u5957\u5404\u81ea\u7ba1\u4ec0\u4e48<\/h2>\n<p>\u5f88\u591a\u4eba\u628a SPF\u3001DKIM\u3001DMARC \u5f53\u6210\u540c\u4e00\u4ef6\u4e8b\uff0c\u5b9e\u9645\u4e0a\u5b83\u4eec\u5206\u5de5\u5f88\u6e05\u695a\u3002SPF \u544a\u8bc9\u6536\u4ef6\u65b9&#8221;\u54ea\u4e9b IP \u53ef\u4ee5\u4ee3\u8868\u6211\u8fd9\u4e2a\u57df\u540d\u53d1\u4fe1&#8221;\uff0c\u9760 DNS \u7684 TXT \u8bb0\u5f55\u58f0\u660e\uff1bDKIM \u7ed9\u6bcf\u5c01\u90ae\u4ef6\u52a0\u4e00\u4e2a\u7528\u79c1\u94a5\u7b7e\u7684 header\uff0c\u6536\u4ef6\u65b9\u7528 DNS \u91cc\u6302\u7684\u516c\u94a5\u9a8c\u7b7e\uff0c\u8bc1\u660e\u90ae\u4ef6\u6ca1\u88ab\u4e2d\u9014\u7be1\u6539\uff1bDMARC \u5219\u662f\u7b56\u7565\u4e0e\u6c47\u62a5\u5c42\uff0c\u544a\u8bc9\u6536\u4ef6\u65b9&#8221;\u5982\u679c SPF \u6216 DKIM \u5931\u8d25\u8be5\u600e\u4e48\u5904\u7406&#8221;\uff0c\u5e76\u8981\u6c42 From \u57df\u5fc5\u987b\u4e0e SPF \u6216 DKIM \u901a\u8fc7\u7684\u57df\u5bf9\u9f50\u3002<\/p>\n<p>\u7406\u89e3\u8fd9\u5c42\u5173\u7cfb\u5f88\u91cd\u8981\uff1aSPF \u4e0e DKIM \u5404\u81ea\u901a\u8fc7\u8fd8\u4e0d\u591f\uff0cDMARC \u8fd8\u8981\u6c42\u81f3\u5c11\u4e00\u9879\u4e0e From \u5934\u90e8\u57df\u540d\u5bf9\u9f50\uff0c\u624d\u7b97\u771f\u6b63\u653e\u884c\u3002\u8fd9\u5c31\u662f\u4e3a\u4ec0\u4e48\u5f88\u591a\u4eba SPF \u663e\u793a pass\u3001DKIM \u663e\u793a pass\uff0cDMARC \u5374 fail\u2014\u2014\u901a\u5e38\u662f SPF \u9a8c\u7684\u662f Return-Path \u57df\u3001DKIM \u7b7e\u7684\u662f\u522b\u7684\u5b50\u57df\uff0cFrom \u53c8\u662f\u4e3b\u57df\uff0c\u5bf9\u4e0d\u4e0a\u53f7\u3002\u5148\u628a\u8fd9\u4e2a\u5fc3\u667a\u6a21\u578b\u5efa\u597d\uff0c\u540e\u9762\u7684\u547d\u4ee4\u624d\u4e0d\u81f3\u4e8e\u6293\u778e\u3002<\/p>\n<h2>DNS \u8bb0\u5f55\u600e\u4e48\u5199<\/h2>\n<p>\u5047\u8bbe\u4e3b\u57df\u662f example.com\uff0c\u90ae\u4ef6\u670d\u52a1\u5668 IP \u662f 203.0.113.10\u3002\u5148\u51c6\u5907\u597d\u4e0b\u9762\u4e09\u6761\u8bb0\u5f55\uff1a<\/p>\n<pre><code>example.com.            IN  TXT  &quot;v=spf1 ip4:203.0.113.10 ~all&quot;\nmail._domainkey.example.com.  IN  TXT  &quot;v=DKIM1; k=rsa; p=MIGfMA0G...&quot;\n_dmarc.example.com.     IN  TXT  &quot;v=DMARC1; p=quarantine; rua=mailto:dmarc@example.com; adkim=s; aspf=s; pct=100&quot;\n<\/code><\/pre>\n<p>\u51e0\u4e2a\u5173\u952e\u70b9\uff1aSPF \u672b\u5c3e\u7528 <code>~all<\/code> \u8f6f\u5931\u8d25\u6bd4 <code>-all<\/code> \u786c\u5931\u8d25\u66f4\u53cb\u597d\uff0c\u4e0a\u7ebf\u521d\u671f\u4e0d\u5bb9\u6613\u8bef\u4f24\u5408\u4f5c\u65b9\uff0c\u7b49\u76d1\u63a7\u7a33\u5b9a\u518d\u6536\u7d27\uff1bDKIM \u7684 selector \u8fd9\u91cc\u53eb <code>mail<\/code>\uff0c\u53ef\u4ee5\u81ea\u5b9a\u4e49\uff0c\u5efa\u8bae\u5e26\u5e74\u4efd\u65b9\u4fbf\u8f6e\u6362\uff0c\u4f8b\u5982 <code>m2026<\/code>\uff1bDMARC \u7684 <code>p=<\/code> \u5efa\u8bae\u4ece <code>none<\/code> \u8d77\u6b65\u53ea\u6536\u62a5\u544a\u4e0d\u62e6\u622a\uff0c\u8dd1\u4e24\u5468\u786e\u8ba4\u6ca1\u8bef\u4f24\u518d\u5347\u5230 <code>quarantine<\/code>\uff0c\u6700\u540e\u624d\u662f <code>p=reject<\/code>\u3002<code>adkim=s<\/code> \u4e0e <code>aspf=s<\/code> \u662f\u4e25\u683c\u5bf9\u9f50\uff0c\u8981\u6c42\u5b50\u57df\u5b8c\u5168\u4e00\u81f4\uff0c\u521d\u671f\u53ef\u4ee5\u5148\u7528 <code>r<\/code> \u653e\u5bbd\u3002<\/p>\n<h2>\u5728 Postfix \u4e0a\u843d\u5730 DKIM \u7b7e\u540d<\/h2>\n<p>SPF \u4e0e DMARC \u662f DNS \u7aef\u7684\u5de5\u4f5c\uff0cDKIM \u5fc5\u987b\u5728\u90ae\u4ef6\u4f20\u8f93\u4ee3\u7406\u4e0a\u505a\u7b7e\u540d\u52a8\u4f5c\uff0c\u6700\u5e38\u7528\u7684\u65b9\u6848\u662f\u628a OpenDKIM \u4f5c\u4e3a\u90ae\u4ef6\u8fc7\u6ee4\u5668\u6302\u5230 Postfix \u4e0a\u3002\u5b89\u88c5\u4e0e\u57fa\u7840\u914d\u7f6e\u5982\u4e0b\uff1a<\/p>\n<pre><code class=\"language-bash\">apt install opendkim opendkim-tools\nmkdir -p \/etc\/opendkim\/keys\/example.com\nopendkim-genkey -b 2048 -d example.com -D \/etc\/opendkim\/keys\/example.com -s mail -v\nchown -R opendkim:opendkim \/etc\/opendkim\/keys\n<\/code><\/pre>\n<p>\u751f\u6210\u7684 <code>mail.txt<\/code> \u91cc\u5c31\u662f\u8981\u53d1\u5e03\u5230 DNS \u7684\u516c\u94a5\uff0c\u53d6\u51fa <code>p=<\/code> \u540e\u9762\u7684\u5b57\u7b26\u4e32\u8d34\u8fdb\u4e0a\u4e00\u8282\u7684 TXT \u8bb0\u5f55\u5373\u53ef\u3002\u7136\u540e\u5728 <code>\/etc\/opendkim.conf<\/code> \u91cc\u6307\u5b9a socket\u3001KeyTable\u3001SigningTable\uff0c\u518d\u5728 <code>\/etc\/postfix\/main.cf<\/code> \u672b\u5c3e\u8ffd\u52a0\uff1a<\/p>\n<pre><code>milter_default_action = accept\nmilter_protocol = 6\nsmtpd_milters = inet:127.0.0.1:8891\nnon_smtpd_milters = inet:127.0.0.1:8891\n<\/code><\/pre>\n<p>\u91cd\u542f\u4e24\u4e2a\u670d\u52a1\u540e\uff0c\u4ece\u672c\u673a\u53d1\u4e00\u5c01\u6d4b\u8bd5\u90ae\u4ef6\u5230\u81ea\u5df1\u7684 Gmail\uff0c\u67e5\u770b\u539f\u59cb\u90ae\u4ef6\u5934\uff0c\u5e94\u8be5\u80fd\u770b\u5230 <code>DKIM-Signature: v=1; a=rsa-sha256; d=example.com; s=mail; ...<\/code> \u8fd9\u4e00\u884c\uff0c\u5e76\u4e14 Gmail \u663e\u793a <code>dkim=pass<\/code>\u3002<\/p>\n<h2>\u5bf9\u9f50\u4e0e\u9a8c\u8bc1<\/h2>\n<p>\u8d70\u5230\u8fd9\u91cc\u6700\u5bb9\u6613\u5361\u7684\u4e0d\u662f\u7b7e\u540d\u672c\u8eab\uff0c\u800c\u662f\u5bf9\u9f50\u3002\u68c0\u67e5\u6e05\u5355\u53ef\u4ee5\u8fd9\u6837\u8dd1\uff1a\u5148\u7528 <code>dig +short TXT example.com<\/code> \u770b SPF \u662f\u5426\u751f\u6548\uff0c\u6ce8\u610f\u4e00\u4e2a\u57df\u4e0a\u540c\u65f6\u5b58\u5728\u4e24\u6761 SPF TXT \u4f1a\u5bfc\u81f4\u6574\u6761\u5931\u6548\uff1b\u518d\u7528 <code>dig +short TXT mail._domainkey.example.com<\/code> \u786e\u8ba4\u516c\u94a5\u5df2\u4e0b\u53d1\uff0c\u957f\u8bb0\u5f55\u6ce8\u610f\u662f\u5426\u88ab DNS \u63a7\u5236\u53f0\u5207\u6210\u591a\u6bb5\u5f15\u53f7\uff1b\u672c\u5730\u7528 <code>opendkim-testkey -d example.com -s mail -vvv<\/code> \u9a8c\u7b7e\uff0c\u8f93\u51fa <code>key OK<\/code> \u624d\u7b97\u53cc\u5411\u901a\uff1b\u6700\u540e\u53d1\u4e00\u5c01\u5230 mail-tester.com \u6216 <code>check-auth@verifier.port25.com<\/code>\uff0c\u80fd\u770b\u5230\u4e09\u9879\u7684\u9010\u9879\u5224\u5b9a\uff0c\u5206\u6570\u5230 9 \u5206\u4ee5\u4e0a\u624d\u7b97\u5408\u683c\u3002\u5982\u679c DMARC \u63d0\u793a from-alignment \u5931\u8d25\uff0c\u591a\u534a\u662f Return-Path \u7528\u4e86 mailgun\u3001sendgrid \u4e4b\u7c7b\u7684\u4e2d\u8f6c\u57df\uff0c\u8981\u4e48\u6539 <code>aspf=r<\/code> \u653e\u5bbd\u5bf9\u9f50\uff0c\u8981\u4e48\u5728\u4e2d\u8f6c\u65b9\u6dfb\u52a0\u81ea\u5b9a\u4e49\u8fd4\u56de\u8def\u5f84\uff0c\u628a 5321.MailFrom \u8c03\u6210\u81ea\u5df1\u7684\u57df\u3002<\/p>\n<h2>\u4e0e\u4e0a\u6e38\u670d\u52a1\u5668\u3001\u7f51\u7edc\u5c42\u7684\u534f\u540c<\/h2>\n<p>\u90ae\u4ef6\u94fe\u8def\u9664\u4e86\u8f6f\u4ef6\u672c\u8eab\uff0c\u8dd1\u5728\u54ea\u53f0\u673a\u5668\u4e0a\u540c\u6837\u91cd\u8981\u3002\u8981\u7a33\u5b9a\u53d1\u4fe1\uff0c\u670d\u52a1\u5668\u7684 IP \u53cd\u5411\u89e3\u6790\u5fc5\u987b\u80fd\u89e3\u56de\u57df\u540d\uff0c\u5426\u5219 Gmail \u76f4\u63a5\u5224\u8fdb\u5783\u573e\u7bb1\u3002\u5982\u679c\u4f60\u7684\u90e8\u7f72\u73af\u5883\u662f\u5883\u5916\u670d\u52a1\u5668\uff0cIP \u4fe1\u8a89\u4e0e\u5730\u7406\u4f4d\u7f6e\u90fd\u4f1a\u5f71\u54cd\u901a\u8fc7\u7387\uff0c\u53ef\u4ee5\u53c2\u8003 <a href=\"https:\/\/cn.hostease.com\/blog\/tutorials\/us-vps-deployment-tutorial-guide\/\">\u7f8e\u56fd VPS\uff08\u865a\u62df\u4e13\u7528\u670d\u52a1\u5668\uff09\u90e8\u7f72\u6559\u7a0b<\/a> \u8bc4\u4f30\u673a\u623f\u4e0e\u521d\u59cb IP \u7684\u53ef\u7528\u6027\u3002Web \u4e1a\u52a1\u548c\u90ae\u4ef6\u4e1a\u52a1\u6700\u597d\u5206\u673a\u5668\u8dd1\uff0c\u524d\u9762\u7684 Web \u5165\u53e3\u5957\u4e0a <a href=\"https:\/\/cn.hostease.com\/blog\/server\/nginx-reverse-proxy-load-balancing\/\">Nginx \u53cd\u5411\u4ee3\u7406\u4e0e\u8d1f\u8f7d\u5747\u8861<\/a> \u4e5f\u4e0d\u4f1a\u5f71\u54cd\u90ae\u4ef6\u7684 25 \u7aef\u53e3\u51fa\u7ad9\uff0c\u4e92\u4e0d\u5e72\u6270\u3002<\/p>\n<p>\u670d\u52a1\u5668\u5f00\u653e 25\u3001465\u3001587 \u7aef\u53e3\u610f\u5473\u7740\u626b\u63cf\u538b\u529b\u6bd4\u7eaf Web \u7ad9\u70b9\u5927\u5f88\u591a\uff0cSSH \u52a0\u56fa\u8fd9\u4e00\u6b65\u7701\u4e0d\u5f97\uff0c\u5efa\u8bae\u53c2\u7167 <a href=\"https:\/\/cn.hostease.com\/blog\/linux\/linux-ssh-fail2ban-hardening\/\">SSH \u4e0e Fail2ban \u52a0\u56fa\u6307\u5357<\/a> \u628a\u66b4\u529b\u7834\u89e3\u6321\u5728\u5916\u9762\u3002\u65e5\u5e38\u9762\u5411\u56fd\u5185\u7528\u6237\u7684 webmail \u5165\u53e3\u60f3\u8981\u66f4\u7a33\u5b9a\u7684\u8fde\u63a5\u4f53\u9a8c\uff0c\u53ef\u4ee5\u53e0\u52a0\u4e00\u5c42 CDN\uff08\u5185\u5bb9\u5206\u53d1\u7f51\u7edc\uff09\uff0c\u4f8b\u5982 <a href=\"https:\/\/cn.hostease.com\/blog\/cdn\/cloudflare-cdn-china-acceleration\/\">Cloudflare CDN \u4e2d\u56fd\u52a0\u901f<\/a>\uff0c\u4f46\u8981\u6ce8\u610f CDN \u53ea\u670d\u52a1 web \u6d41\u91cf\uff0c\u90ae\u4ef6 25 \u7aef\u53e3\u4e0d\u80fd\u4e5f\u4e0d\u5e94\u8be5\u8d70 CDN\u3002\u5982\u679c\u4e1a\u52a1\u6070\u597d\u8dd1\u5728 WordPress \u7ad9\u70b9\u4e0a\u53d1\u901a\u77e5\u90ae\u4ef6\uff0c\u524d\u7aef\u7f13\u5b58\u914d\u7f6e\u53ef\u4ee5\u53c2\u8003 <a href=\"https:\/\/cn.hostease.com\/blog\/wordpress\/wordpress-w3-total-cache-tuning\/\">WordPress \u4e0e W3 Total Cache \u8c03\u4f18<\/a> \u7684\u601d\u8def\uff0c\u907f\u514d\u53d1\u4fe1\u811a\u672c\u88ab\u7f13\u5b58\u5c42\u610f\u5916\u62e6\u622a\u3002<\/p>\n<h2>\u5e38\u89c1\u8e29\u5751<\/h2>\n<p>SPF \u540c\u4e00\u4e2a\u57df\u540d\u6302\u4e86\u4e24\u6761 TXT \u662f\u6700\u7ecf\u5178\u7684\u5751\uff0c\u7ed3\u679c\u6574\u6761 SPF \u5931\u6548\uff0c\u5fc5\u987b\u628a\u591a\u6761\u5408\u5e76\u6210\u4e00\u6761\u8bb0\u5f55\u624d\u80fd\u6062\u590d\u3002DKIM \u516c\u94a5\u8d34\u5230 DNS \u63a7\u5236\u53f0\u65f6\u5bb9\u6613\u88ab\u81ea\u52a8\u52a0\u4e0a\u5f15\u53f7\u6216\u622a\u65ad\uff0c\u7c98\u8d34\u524d\u5148\u628a\u6362\u884c\u53bb\u6389\uff0c\u518d\u7528 dig \u53cd\u67e5\u4e00\u6b21\u786e\u8ba4\u5b8c\u6574\u3002OpenDKIM \u542f\u52a8\u540e Postfix 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