{"id":32066,"date":"2026-07-20T10:00:00","date_gmt":"2026-07-20T02:00:00","guid":{"rendered":"https:\/\/cn.hostease.com\/blog\/?p=32066"},"modified":"2026-07-25T21:36:58","modified_gmt":"2026-07-25T13:36:58","slug":"vps-mail-server-setup","status":"publish","type":"post","link":"https:\/\/cn.hostease.com\/blog\/tutorials\/vps-mail-server-setup\/","title":{"rendered":"VPS \u90ae\u4ef6\u670d\u52a1\u5668\u642d\u5efa\u6307\u5357\uff1aPostfix\u3001Dovecot \u4e0e SPF\/DKIM"},"content":{"rendered":"<p><img decoding=\"async\" src=\"https:\/\/cn.hostease.com\/blog\/wp-content\/uploads\/2026\/07\/vps-mail-server-setup-cover.webp\" alt=\"VPS \u90ae\u4ef6\u670d\u52a1\u5668\u642d\u5efa\u7684\u6574\u4f53\u67b6\u6784\u793a\u610f\" loading=\"lazy\" \/><\/p>\n<p>\u642d\u5efa <a href=\"https:\/\/cn.hostease.com\/vps\/\">VPS<\/a>\uff08<a href=\"https:\/\/cn.hostease.com\/vps\/\">\u865a\u62df\u4e13\u7528\u670d\u52a1\u5668<\/a>\uff09\u90ae\u4ef6\u670d\u52a1\u5668\uff0c\u5f88\u591a\u4eba\u4e00\u5f00\u59cb\u53ea\u5173\u6ce8\u201c\u80fd\u4e0d\u80fd\u53d1\u51fa\u53bb\u201d\uff0c\u771f\u6b63\u4e0a\u7ebf\u540e\u624d\u53d1\u73b0\u95ee\u9898\u5728\u201c\u80fd\u4e0d\u80fd\u7a33\u5b9a\u9001\u8fbe\u6536\u4ef6\u7bb1\u201d\u3002\u8fd9\u7bc7\u6307\u5357\u4f1a\u5e2e\u52a9\u4f60\u628a Postfix\u3001Dovecot\u3001SPF\u3001DKIM \u4e0e DMARC \u4e32\u8d77\u6765\uff0c\u89e3\u51b3\u4ece\u7cfb\u7edf\u51c6\u5907\u3001\u6536\u53d1\u914d\u7f6e\u5230\u6295\u9012\u9a8c\u8bc1\u7684\u5173\u952e\u73af\u8282\u3002\u6211\u4eec\u4e0d\u628a\u5b83\u5199\u6210\u4e00\u4efd\u590d\u5236\u547d\u4ee4\u5c31\u7ed3\u675f\u7684\u6e05\u5355\uff0c\u800c\u662f\u6309\u201c\u4e3a\u4ec0\u4e48\u8fd9\u6837\u914d\u3001\u5982\u4f55\u9a8c\u8bc1\u3001\u51fa\u9519\u770b\u54ea\u91cc\u201d\u7684\u987a\u5e8f\u5c55\u5f00\uff0c\u65b9\u4fbf\u4f60\u5728\u81ea\u5df1\u7684\u4e1a\u52a1\u57df\u540d\u4e0a\u590d\u7528\u3002<\/p>\n<h2>\u5148\u5224\u65ad\u662f\u5426\u9002\u5408\u81ea\u5efa\u90ae\u4ef6\u670d\u52a1\u5668<\/h2>\n<p>\u81ea\u5efa\u90ae\u4ef6\u670d\u52a1\u9002\u5408\u5bf9\u57df\u540d\u3001\u65e5\u5fd7\u3001\u961f\u5217\u548c\u8ba4\u8bc1\u7b56\u7565\u6709\u63a7\u5236\u9700\u6c42\u7684\u56e2\u961f\uff0c\u6bd4\u5982\u9700\u8981\u4e3a\u4e1a\u52a1\u7cfb\u7edf\u53d1\u9001\u8ba2\u5355\u63d0\u9192\u3001\u4e3a\u5185\u90e8\u6210\u5458\u63d0\u4f9b\u5c11\u91cf\u90ae\u7bb1\uff0c\u6216\u5e0c\u671b\u628a\u53d1\u9001\u65e5\u5fd7\u4fdd\u7559\u5728\u81ea\u5df1\u7684 VPS\uff08\u865a\u62df<a href=\"https:\/\/cn.hostease.com\/dedicated-server\/\">\u4e13\u7528\u670d\u52a1\u5668<\/a>\uff09\u73af\u5883\u4e2d\u3002\u4f46\u5b83\u5e76\u4e0d\u9002\u5408\u6240\u6709\u573a\u666f\uff1a\u5982\u679c\u4f60\u6bcf\u5929\u8981\u53d1\u9001\u6570\u4e07\u5c01\u8425\u9500\u90ae\u4ef6\uff0c\u6216\u8005\u6ca1\u6709\u65f6\u95f4\u5904\u7406\u9ed1\u540d\u5355\u3001\u9000\u4fe1\u548c IP \u58f0\u8a89\uff0c\u4f7f\u7528\u4e13\u95e8\u7684\u90ae\u4ef6\u670d\u52a1\u4f1a\u66f4\u7701\u5fc3\u3002<\/p>\n<p>\u5982\u679c\u4f60\u6b63\u5728\u4e3a\u7f51\u7ad9\u6216\u4e1a\u52a1\u7cfb\u7edf\u6311\u9009\u57fa\u7840\u73af\u5883\uff0c\u53ef\u4ee5\u5148\u4e86\u89e3 <a href=\"https:\/\/cn.hostease.com\/vps\/\">VPS \u4e3b\u673a<\/a> \u7684\u8d44\u6e90\u9694\u79bb\u65b9\u5f0f\uff0c\u518d\u7ed3\u5408 <a href=\"https:\/\/cn.hostease.com\/blog\/server\/\">\u670d\u52a1\u5668\u914d\u7f6e<\/a> \u7c7b\u6587\u7ae0\u8bc4\u4f30 CPU\u3001\u5185\u5b58\u548c\u78c1\u76d8 I\/O\u3002\u90ae\u4ef6\u670d\u52a1\u4e0d\u4e00\u5b9a\u5403\u5927\u91cf\u7b97\u529b\uff0c\u4f46\u5bf9\u7a33\u5b9a\u7f51\u7edc\u3001\u56fa\u5b9a\u516c\u7f51 IP\u3001\u53cd\u5411\u89e3\u6790\u548c\u957f\u671f\u53ef\u7ef4\u62a4\u6027\u8981\u6c42\u8f83\u9ad8\uff0c\u8fd9\u4e9b\u56e0\u7d20\u4f1a\u76f4\u63a5\u5f71\u54cd\u6295\u9012\u7387\u3002<\/p>\n<h2>\u51c6\u5907\u57df\u540d\u3001\u4e3b\u673a\u540d\u548c\u57fa\u7840\u5b89\u5168\u914d\u7f6e<\/h2>\n<p>\u90ae\u4ef6\u7cfb\u7edf\u6700\u6015\u201c\u8eab\u4efd\u4e0d\u4e00\u81f4\u201d\u3002\u4f60\u9700\u8981\u5148\u786e\u5b9a\u4e00\u4e2a\u90ae\u4ef6\u4e3b\u673a\u540d\uff0c\u4f8b\u5982 <code>mail.example.com<\/code>\uff0c\u5e76\u8ba9\u5b83\u548c\u670d\u52a1\u5668\u516c\u7f51 IP\u3001\u53cd\u5411\u89e3\u6790\u3001TLS \u8bc1\u4e66\u4fdd\u6301\u4e00\u81f4\u3002\u5f88\u591a\u6295\u9012\u5931\u8d25\u4e0d\u662f Postfix \u672c\u8eab\u51fa\u9519\uff0c\u800c\u662f\u6536\u4ef6\u65b9\u770b\u5230 HELO \u4e3b\u673a\u540d\u3001PTR \u53cd\u5411\u89e3\u6790\u548c SPF \u6388\u6743\u8303\u56f4\u5bf9\u4e0d\u4e0a\uff0c\u4e8e\u662f\u628a\u90ae\u4ef6\u653e\u8fdb\u5783\u573e\u7bb1\u6216\u76f4\u63a5\u62d2\u6536\u3002<\/p>\n<p>\u5efa\u8bae\u4e0a\u7ebf\u524d\u5b8c\u6210\u8fd9\u51e0\u9879\u57fa\u7840\u51c6\u5907\uff1a<\/p>\n<ul>\n<li>\u4e3b\u673a\u540d\uff1a\u7cfb\u7edf hostname \u4f7f\u7528 <code>mail.example.com<\/code>\uff0cPostfix \u7684 <code>myhostname<\/code> \u4e0e\u5b83\u4fdd\u6301\u4e00\u81f4\u3002<\/li>\n<li>\u9632\u706b\u5899\uff1a\u5f00\u653e 25\u3001587\u3001993 \u7aef\u53e3\uff1b25 \u7528\u4e8e\u670d\u52a1\u5668\u95f4\u6295\u9012\uff0c587 \u7528\u4e8e\u5ba2\u6237\u7aef\u63d0\u4ea4\uff0c993 \u7528\u4e8e IMAP over SSL\uff08\u5b89\u5168\u4f20\u8f93\u534f\u8bae\uff09\u3002<\/li>\n<li>PTR\uff1a\u5411\u670d\u52a1\u5546\u7533\u8bf7\u628a\u516c\u7f51 IP \u53cd\u5411\u89e3\u6790\u5230 <code>mail.example.com<\/code>\uff0c\u5e76\u786e\u4fdd\u6b63\u5411 A \u8bb0\u5f55\u4e5f\u6307\u56de\u540c\u4e00 IP\u3002<\/li>\n<li>\u7cfb\u7edf\u66f4\u65b0\uff1a\u5728 Ubuntu\/Debian \u4e0a\u6267\u884c <code>apt update &amp;&amp; apt upgrade<\/code>\uff0c\u907f\u514d\u65e7\u7248 OpenSSL \u6216\u90ae\u4ef6\u7ec4\u4ef6\u5e26\u6765\u517c\u5bb9\u95ee\u9898\u3002<\/li>\n<li>\u65f6\u95f4\u540c\u6b65\uff1a\u542f\u7528 <code>systemd-timesyncd<\/code> \u6216 chrony\uff0cDKIM \u7b7e\u540d\u548c TLS \u8bc1\u4e66\u6821\u9a8c\u90fd\u4f9d\u8d56\u51c6\u786e\u65f6\u95f4\u3002<\/li>\n<\/ul>\n<p><img decoding=\"async\" src=\"https:\/\/cn.hostease.com\/blog\/wp-content\/uploads\/2026\/07\/vps-mail-server-setup-identity.webp\" alt=\"\u90ae\u4ef6\u670d\u52a1\u5668\u8eab\u4efd\u4e00\u81f4\u6027\u7684\u89c6\u89c9\u793a\u610f\" loading=\"lazy\" \/><\/p>\n<p>\u63a5\u4e0b\u6765\u518d\u5b89\u88c5 Postfix \u4e0e Dovecot\u3002Postfix \u8d1f\u8d23 SMTP \u6536\u53d1\uff0cDovecot \u8d1f\u8d23 IMAP\/POP3 \u8bfb\u53d6\u90ae\u7bb1\uff1b\u4f60\u53ef\u4ee5\u628a Postfix \u7406\u89e3\u4e3a\u201c\u90ae\u5c40\u5206\u62e3\u4e0e\u6d3e\u9001\u201d\uff0c\u628a Dovecot \u7406\u89e3\u4e3a\u201c\u7528\u6237\u6253\u5f00\u90ae\u7bb1\u53d6\u4fe1\u201d\u3002\u5982\u679c\u662f Ubuntu 22.04 \u6216 24.04\uff0c\u57fa\u7840\u5b89\u88c5\u901a\u5e38\u53ef\u4ee5\u8fd9\u6837\u5f00\u59cb\uff1a<\/p>\n<pre><code class=\"language-bash\">sudo apt update\nsudo apt install postfix dovecot-imapd dovecot-lmtpd opendkim opendkim-tools certbot\n<\/code><\/pre>\n<p>\u5b89\u88c5 Postfix \u65f6\u53ef\u4ee5\u9009\u62e9 <code>Internet Site<\/code>\uff0c\u7cfb\u7edf\u90ae\u4ef6\u540d\u586b\u5199\u4f60\u7684\u6839\u57df\u540d\uff0c\u4f8b\u5982 <code>example.com<\/code>\u3002\u5b89\u88c5\u5b8c\u6210\u540e\uff0c\u4e0d\u8981\u6025\u7740\u5916\u53d1\u6d4b\u8bd5\u90ae\u4ef6\uff0c\u5148\u628a TLS\u3001\u865a\u62df\u90ae\u7bb1\u8def\u5f84\u548c\u8ba4\u8bc1\u65b9\u5f0f\u68b3\u7406\u6e05\u695a\uff0c\u5426\u5219\u540e\u9762\u6392\u67e5\u4f1a\u6df7\u5728\u4e00\u8d77\u3002<\/p>\n<h2>\u914d\u7f6e Postfix \u4e0e Dovecot \u7684\u6536\u53d1\u94fe\u8def<\/h2>\n<p>Postfix \u7684\u6838\u5fc3\u914d\u7f6e\u901a\u5e38\u5728 <code>\/etc\/postfix\/main.cf<\/code>\u3002\u4e00\u4e2a\u57fa\u7840\u53ef\u7528\u7684\u65b9\u5411\u662f\uff1a\u670d\u52a1\u5668\u53ea\u63a5\u53d7\u672c\u673a\u57df\u540d\u90ae\u4ef6\uff0c\u4e0d\u505a\u5f00\u653e\u4e2d\u7ee7\uff1b\u5ba2\u6237\u7aef\u63d0\u4ea4\u90ae\u4ef6\u5fc5\u987b\u8d70 587 \u7aef\u53e3\u5e76\u901a\u8fc7 SASL \u8ba4\u8bc1\uff1b\u672c\u5730\u6295\u9012\u4ea4\u7ed9 Dovecot LMTP\u3002\u4ee5\u4e0b\u7247\u6bb5\u5c55\u793a\u5173\u952e\u53c2\u6570\uff0c\u771f\u5b9e\u57df\u540d\u8981\u66ff\u6362\u4e3a\u4f60\u81ea\u5df1\u7684\u57df\u540d\uff1a<\/p>\n<pre><code class=\"language-ini\">myhostname = mail.example.com\nmydomain = example.com\nmyorigin = \/etc\/mailname\ninet_interfaces = all\ninet_protocols = ipv4\nmydestination = $myhostname, localhost.$mydomain, localhost\nsmtpd_tls_cert_file = \/etc\/letsencrypt\/live\/mail.example.com\/fullchain.pem\nsmtpd_tls_key_file = \/etc\/letsencrypt\/live\/mail.example.com\/privkey.pem\nsmtpd_tls_security_level = may\nsmtpd_sasl_type = dovecot\nsmtpd_sasl_path = private\/auth\nsmtpd_sasl_auth_enable = yes\nsmtpd_recipient_restrictions = permit_sasl_authenticated, reject_unauth_destination\nmailbox_transport = lmtp:unix:private\/dovecot-lmtp\n<\/code><\/pre>\n<p>\u8fd9\u91cc\u6700\u5173\u952e\u7684\u662f <code>reject_unauth_destination<\/code>\u3002\u6ca1\u6709\u5b83\uff0c\u670d\u52a1\u5668\u53ef\u80fd\u53d8\u6210\u5f00\u653e\u4e2d\u7ee7\uff0c\u88ab\u6ee5\u7528\u53d1\u9001\u5783\u573e\u90ae\u4ef6\u540e\u5f88\u5feb\u8fdb\u5165\u9ed1\u540d\u5355\u3002\u4f60\u53ef\u4ee5\u7528 <code>postconf -n<\/code> \u67e5\u770b\u751f\u6548\u914d\u7f6e\uff0c\u7528 <code>systemctl reload postfix<\/code> \u91cd\u65b0\u52a0\u8f7d\u914d\u7f6e\uff0c\u800c\u4e0d\u662f\u6bcf\u6b21\u90fd\u91cd\u542f\u670d\u52a1\u3002<\/p>\n<p>Dovecot \u4fa7\u91cd\u70b9\u662f\u90ae\u7bb1\u4f4d\u7f6e\u3001\u767b\u5f55\u8ba4\u8bc1\u548c Postfix \u5bf9\u63a5\u3002\u5e38\u89c1\u505a\u6cd5\u662f\u4f7f\u7528 Maildir \u683c\u5f0f\uff0c\u4f8b\u5982 <code>\/home\/%u\/Maildir<\/code>\uff0c\u5e76\u5728 <code>\/etc\/dovecot\/conf.d\/10-mail.conf<\/code> \u4e2d\u8bbe\u7f6e\uff1a<\/p>\n<pre><code class=\"language-ini\">mail_location = maildir:~\/Maildir\n<\/code><\/pre>\n<p>\u7136\u540e\u5728 <code>10-master.conf<\/code> \u4e2d\u5f00\u653e\u7ed9 Postfix \u4f7f\u7528\u7684 auth socket\uff1a<\/p>\n<pre><code class=\"language-ini\">unix_listener \/var\/spool\/postfix\/private\/auth {\n  mode = 0660\n  user = postfix\n  group = postfix\n}\n<\/code><\/pre>\n<p>\u5b8c\u6210\u540e\u6267\u884c <code>doveconf -n<\/code> \u68c0\u67e5\u6700\u7ec8\u914d\u7f6e\uff0c\u518d\u7528 <code>systemctl restart dovecot postfix<\/code> \u8ba9\u4e24\u8fb9\u4e00\u8d77\u751f\u6548\u3002\u5982\u679c\u4f60\u6b64\u524d\u4e5f\u5728\u505a <a href=\"https:\/\/cn.hostease.com\/blog\/guides\/ttfb-hosting-optimization\/\">\u7f51\u7ad9\u6027\u80fd<\/a> \u6216 Web \u670d\u52a1\u8c03\u4f18\uff0c\u5efa\u8bae\u628a\u90ae\u4ef6\u670d\u52a1\u7684\u65e5\u5fd7\u3001\u961f\u5217\u548c\u8bc1\u4e66\u7eed\u671f\u5355\u72ec\u7eb3\u5165\u76d1\u63a7\uff0c\u907f\u514d Web \u4e0e\u90ae\u4ef6\u5171\u7528\u8d44\u6e90\u65f6\u4e92\u76f8\u5f71\u54cd\u3002<\/p>\n<h2>\u914d\u7f6e SPF\u3001DKIM \u4e0e DMARC \u63d0\u9ad8\u53ef\u4fe1\u5ea6<\/h2>\n<p>\u80fd\u6210\u529f\u53d1\u9001 SMTP \u90ae\u4ef6\uff0c\u53ea\u8bf4\u660e\u94fe\u8def\u901a\u4e86\uff1b\u80fd\u7a33\u5b9a\u8fdb\u5165\u6536\u4ef6\u7bb1\uff0c\u8fd8\u8981\u8ba9\u6536\u4ef6\u65b9\u76f8\u4fe1\u201c\u8fd9\u5c01\u90ae\u4ef6\u786e\u5b9e\u6765\u81ea\u4f60\u7684\u57df\u540d\u201d\u3002SPF\u3001DKIM \u548c DMARC \u5c31\u662f\u8fd9\u5c42\u4fe1\u4efb\u57fa\u7840\u3002SPF \u8bf4\u660e\u54ea\u4e9b\u670d\u52a1\u5668 IP \u53ef\u4ee5\u4ee3\u8868\u57df\u540d\u53d1\u4fe1\uff0cDKIM \u4f7f\u7528\u79c1\u94a5\u7ed9\u90ae\u4ef6\u7b7e\u540d\uff0cDMARC \u544a\u8bc9\u6536\u4ef6\u65b9\u5f53 SPF \u6216 DKIM \u4e0d\u5339\u914d\u65f6\u600e\u4e48\u5904\u7406\u3002<\/p>\n<p>\u5148\u6dfb\u52a0 SPF \u8bb0\u5f55\u3002\u5982\u679c\u53ea\u6709\u8fd9\u53f0\u90ae\u4ef6\u670d\u52a1\u5668\u8d1f\u8d23\u53d1\u4fe1\uff0cDNS\uff08\u57df\u540d\u7cfb\u7edf\uff09TXT \u8bb0\u5f55\u53ef\u4ee5\u4ece\u8f83\u4e25\u683c\u7684\u7248\u672c\u5f00\u59cb\uff1a<\/p>\n<pre><code class=\"language-txt\">example.com.  TXT  &quot;v=spf1 mx -all&quot;\n<\/code><\/pre>\n<p>\u5982\u679c\u4e1a\u52a1\u7cfb\u7edf\u8fd8\u4f1a\u901a\u8fc7\u7b2c\u4e09\u65b9\u670d\u52a1\u53d1\u9001\u901a\u77e5\u90ae\u4ef6\uff0c\u5c31\u4e0d\u80fd\u7b80\u5355\u4f7f\u7528 <code>-all<\/code> \u5c01\u6b7b\uff0c\u9700\u8981\u628a\u5bf9\u5e94\u53d1\u9001\u6765\u6e90\u7eb3\u5165\u540c\u4e00\u6761 SPF \u8bb0\u5f55\u3002SPF \u8bb0\u5f55\u4e0d\u80fd\u65e0\u9650\u53e0\u52a0\uff0c\u591a\u4e2a TXT \u7248\u672c\u4f1a\u5bfc\u81f4\u89e3\u6790\u6b67\u4e49\uff1b\u751f\u4ea7\u73af\u5883\u5efa\u8bae\u4fdd\u6301\u4e00\u6761\u4e3b\u8bb0\u5f55\uff0c\u5e76\u63a7\u5236 DNS \u67e5\u8be2\u6b21\u6570\u4e0d\u8d85\u8fc7 10 \u6b21\u3002<\/p>\n<p>DKIM \u63a8\u8350\u7528 OpenDKIM \u751f\u6210\u5bc6\u94a5\u3002\u793a\u4f8b\u547d\u4ee4\u5982\u4e0b\uff1a<\/p>\n<pre><code class=\"language-bash\">sudo mkdir -p \/etc\/opendkim\/keys\/example.com\nsudo opendkim-genkey -b 2048 -d example.com -s mail -D \/etc\/opendkim\/keys\/example.com\nsudo chown -R opendkim:opendkim \/etc\/opendkim\/keys\/example.com\n<\/code><\/pre>\n<p>\u751f\u6210\u540e\u4f1a\u5f97\u5230 <code>mail.private<\/code> \u548c <code>mail.txt<\/code>\u3002\u628a <code>mail.txt<\/code> \u4e2d\u7684\u516c\u94a5\u5185\u5bb9\u6dfb\u52a0\u5230 DNS\uff08\u57df\u540d\u7cfb\u7edf\uff09TXT \u8bb0\u5f55\uff0c\u540d\u79f0\u4e00\u822c\u662f <code>mail._domainkey.example.com<\/code>\u3002Postfix \u4e0e OpenDKIM \u5bf9\u63a5\u65f6\uff0c\u5e38\u7528\u672c\u5730 socket\uff0c\u4f8b\u5982\u5728 Postfix \u4e2d\u52a0\u5165\uff1a<\/p>\n<pre><code class=\"language-ini\">milter_default_action = accept\nmilter_protocol = 6\nsmtpd_milters = local:\/opendkim\/opendkim.sock\nnon_smtpd_milters = local:\/opendkim\/opendkim.sock\n<\/code><\/pre>\n<p><img decoding=\"async\" src=\"https:\/\/cn.hostease.com\/blog\/wp-content\/uploads\/2026\/07\/vps-mail-server-setup-auth.webp\" alt=\"SPF DKIM DMARC \u8ba4\u8bc1\u5173\u7cfb\u793a\u610f\" loading=\"lazy\" \/><\/p>\n<p>\u6700\u540e\u6dfb\u52a0 DMARC\u3002\u521d\u671f\u4e0d\u8981\u76f4\u63a5\u4e0a\u6700\u4e25\u683c\u7b56\u7565\uff0c\u53ef\u4ee5\u5148\u7528 <code>p=none<\/code> \u6536\u96c6\u62a5\u544a\uff0c\u786e\u8ba4\u6ca1\u6709\u5408\u6cd5\u90ae\u4ef6\u88ab\u8bef\u4f24\u540e\u518d\u8c03\u6574\u5230 <code>quarantine<\/code> \u6216 <code>reject<\/code>\uff1a<\/p>\n<pre><code class=\"language-txt\">_dmarc.example.com. TXT &quot;v=DMARC1; p=none; rua=mailto:dmarc@example.com; adkim=s; aspf=s&quot;\n<\/code><\/pre>\n<p>\u8fd9\u4e00\u6b65\u5b8c\u6210\u540e\uff0c\u6587\u7ae0\u5c31\u4ece\u201c\u914d\u7f6e\u8f6f\u4ef6\u201d\u8fdb\u5165\u201c\u5efa\u7acb\u57df\u540d\u53ef\u4fe1\u5ea6\u201d\u3002\u5982\u679c\u4f60\u8fd8\u5728\u540c\u6b65\u7ef4\u62a4\u7f51\u7ad9\u7684 SSL\uff08\u5b89\u5168\u4f20\u8f93\u534f\u8bae\uff09\u8bc1\u4e66\u3001DNS\uff08\u57df\u540d\u7cfb\u7edf\uff09\u548c\u5b89\u5168\u7b56\u7565\uff0c\u53ef\u4ee5\u53c2\u8003 <a href=\"https:\/\/cn.hostease.com\/blog\/wordpress\/\">WordPress \u6559\u7a0b<\/a> \u7684\u7ad9\u70b9\u7ef4\u62a4\u601d\u8def\u3002<\/p>\n<h2>\u4e0a\u7ebf\u524d\u9a8c\u8bc1\uff1a\u4e0d\u8981\u53ea\u770b\u4e00\u5c01\u6d4b\u8bd5\u90ae\u4ef6<\/h2>\n<p>\u4e0a\u7ebf\u9a8c\u8bc1\u5206\u4e09\u5c42\uff1a\u670d\u52a1\u7aef\u53e3\u3001\u8ba4\u8bc1\u7ed3\u679c\u3001\u6295\u9012\u8868\u73b0\u3002\u7aef\u53e3\u5c42\u9762\u4ece\u5916\u90e8\u7f51\u7edc\u6d4b\u8bd5 25\u3001587\u3001993\uff1b\u8ba4\u8bc1\u5c42\u9762\u786e\u8ba4 SPF\u3001DKIM\u3001DMARC \u540c\u65f6\u901a\u8fc7\uff1b\u6295\u9012\u5c42\u9762\u89c2\u5bdf\u9000\u4fe1\u3001\u5ef6\u8fdf\u548c\u5783\u573e\u7bb1\u6bd4\u4f8b\u3002<\/p>\n<p>\u4f60\u53ef\u4ee5\u6309\u4e0b\u9762\u987a\u5e8f\u505a\u6700\u5c0f\u9a8c\u8bc1\uff1a<\/p>\n<ul>\n<li>\u7528 <code>openssl s_client -connect mail.example.com:993<\/code> \u68c0\u67e5 IMAP SSL\uff08\u5b89\u5168\u4f20\u8f93\u534f\u8bae\uff09\u8bc1\u4e66\u94fe\u662f\u5426\u5b8c\u6574\u3002<\/li>\n<li>\u7528 <code>swaks --to user@external.example --server mail.example.com --auth LOGIN --port 587 --tls<\/code> \u6d4b\u8bd5\u5ba2\u6237\u7aef\u63d0\u4ea4\u94fe\u8def\u3002<\/li>\n<li>\u7528 <code>mailq<\/code> \u67e5\u770b\u961f\u5217\u662f\u5426\u79ef\u538b\uff0c\u6b63\u5e38\u60c5\u51b5\u4e0b\u5c0f\u7ad9\u70b9\u961f\u5217\u5e94\u5728\u51e0\u5206\u949f\u5185\u6e05\u7a7a\u3002<\/li>\n<li>\u67e5\u770b <code>\/var\/log\/mail.log<\/code> \u4e2d\u7684 <code>status=sent<\/code>\u3001<code>deferred<\/code>\u3001<code>bounced<\/code>\uff0c\u6309\u6536\u4ef6\u57df\u540d\u5f52\u7c7b\u6392\u67e5\u3002<\/li>\n<li>\u7528\u6536\u4ef6\u65b9\u539f\u59cb\u90ae\u4ef6\u5934\u786e\u8ba4 <code>spf=pass<\/code>\u3001<code>dkim=pass<\/code>\u3001<code>dmarc=pass<\/code> \u662f\u5426\u540c\u65f6\u51fa\u73b0\u3002<\/li>\n<\/ul>\n<p><img decoding=\"async\" src=\"https:\/\/cn.hostease.com\/blog\/wp-content\/uploads\/2026\/07\/vps-mail-server-setup-validation.webp\" alt=\"\u90ae\u4ef6\u6295\u9012\u9a8c\u8bc1\u4e0e\u65e5\u5fd7\u6392\u67e5\u793a\u610f\" loading=\"lazy\" \/><\/p>\n<p>\u5982\u679c\u51fa\u73b0 <code>Relay access denied<\/code>\uff0c\u591a\u534a\u662f\u6536\u4ef6\u4eba\u9650\u5236\u6216\u8ba4\u8bc1\u63d0\u4ea4\u914d\u7f6e\u6709\u8bef\uff1b<code>Connection timed out<\/code> \u8981\u68c0\u67e5 25 \u7aef\u53e3\uff1b<code>SPF fail<\/code> \u5219\u770b\u53d1\u4fe1 IP \u662f\u5426\u5728 SPF \u6388\u6743\u8303\u56f4\u5185\u3002\u6392\u9519\u65f6\u6bcf\u6b21\u53ea\u6539\u4e00\u5904\uff0c\u518d\u7528 <code>postfix check<\/code> \u548c\u56fa\u5b9a\u6d4b\u8bd5\u90ae\u4ef6\u9a8c\u8bc1\u3002<\/p>\n<h2>\u7ef4\u62a4\u5efa\u8bae\u4e0e\u9002\u7528\u8fb9\u754c<\/h2>\n<p>\u81ea\u5efa\u90ae\u4ef6\u670d\u52a1\u5668\u4e0d\u662f\u201c\u4e00\u6b21\u642d\u597d\u5c31\u4e0d\u7528\u7ba1\u201d\u7684\u7cfb\u7edf\u3002\u5efa\u8bae\u6bcf\u5468\u68c0\u67e5\u90ae\u4ef6\u961f\u5217\u548c\u9000\u4fe1\u65e5\u5fd7\uff0c\u6bcf\u6708\u786e\u8ba4 IP \u662f\u5426\u8fdb\u5165\u5e38\u89c1\u9ed1\u540d\u5355\uff1b\u4e1a\u52a1\u7cfb\u7edf\u53d1\u4fe1\u5e94\u4f7f\u7528\u5e94\u7528\u4e13\u7528\u8d26\u53f7\uff0c\u5e76\u9650\u5236\u5b83\u53ea\u901a\u8fc7 587 \u7aef\u53e3\u8ba4\u8bc1\u63d0\u4ea4\u3002<\/p>\n<p>\u5982\u679c\u4f60\u9700\u8981\u7684\u662f\u7a33\u5b9a\u4e1a\u52a1\u90ae\u4ef6\u3001\u5c11\u91cf\u56e2\u961f\u90ae\u7bb1\u548c\u53ef\u63a7\u65e5\u5fd7\uff0c\u81ea\u5efa VPS\uff08\u865a\u62df\u4e13\u7528\u670d\u52a1\u5668\uff09\u90ae\u4ef6\u670d\u52a1\u5668\u53ef\u4ee5\u8003\u8651\uff1b\u5982\u679c\u76ee\u6807\u662f\u5927\u89c4\u6a21\u8425\u9500\u90ae\u4ef6\u6216\u8de8\u533a\u57df\u9ad8\u9891\u6295\u9012\uff0c\u66f4\u63a8\u8350\u4f7f\u7528\u4e13\u4e1a\u90ae\u4ef6\u5e73\u53f0\u914d\u5408\u57df\u540d\u8ba4\u8bc1\u3002\u603b\u7ed3\u6765\u8bf4\uff0cPostfix \u4e0e Dovecot \u89e3\u51b3\u201c\u6536\u53d1\u94fe\u8def\u201d\uff0cSPF\u3001DKIM\u3001DMARC \u89e3\u51b3\u201c\u8eab\u4efd\u53ef\u4fe1\u201d\uff0c\u65e5\u5fd7\u548c\u961f\u5217\u76d1\u63a7\u89e3\u51b3\u201c\u957f\u671f\u53ef\u7ef4\u62a4\u201d\u3002\u628a\u8fd9\u4e09\u5c42\u90fd\u505a\u597d\uff0c\u90ae\u4ef6\u670d\u52a1\u5668\u624d\u7b97\u771f\u6b63\u8fdb\u5165\u53ef\u8fd0\u8425\u72b6\u6001\u3002<\/p>\n<p>\u5982\u679c\u4f60\u51c6\u5907\u628a\u90ae\u4ef6\u670d\u52a1\u4e0e\u4f01\u4e1a\u5b98\u7f51\u3001\u5916\u8d38\u7ad9\u6216 WordPress \u7ad9\u70b9\u90e8\u7f72\u5728\u540c\u4e00\u57fa\u7840\u8bbe\u65bd\u4e0a\uff0c\u53ef\u4ee5\u628a CPU\u3001\u5185\u5b58\u3001\u78c1\u76d8 I\/O\u3001\u5907\u4efd\u548c <a href=\"https:\/\/cn.hostease.com\/web-hosting\/\">\u865a\u62df\u4e3b\u673a<\/a> \u65b9\u6848\u653e\u5728\u4e00\u8d77\u8bc4\u4f30\u3002Hostease \u7684 VPS\uff08\u865a\u62df\u4e13\u7528\u670d\u52a1\u5668\uff09\u9002\u5408\u7528\u4f5c\u8fd9\u7c7b\u4e2d\u5c0f\u89c4\u6a21\u90ae\u4ef6\u670d\u52a1\u7684\u57fa\u7840\u73af\u5883\uff0c\u4f46\u6211\u4eec\u4ecd\u5efa\u8bae\u5148\u7528\u6d4b\u8bd5\u57df\u540d\u5b8c\u6574\u8dd1\u901a 7 \u5929\uff0c\u518d\u8fc1\u79fb\u6b63\u5f0f\u4e1a\u52a1\u90ae\u7bb1\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u9762\u5411\u7ad9\u957f\u548c\u8fd0\u7ef4\u4eba\u5458\u7684 VPS \u90ae\u4ef6\u670d\u52a1\u5668\u642d\u5efa\u6307\u5357\uff0c\u8bb2\u89e3 Postfix\u3001Dovecot\u3001SPF\u3001DKIM\u3001DMARC \u4e0e\u6295\u9012\u9a8c\u8bc1\u7684\u5173\u952e\u6b65\u9aa4\u3002<\/p>\n","protected":false},"author":2,"featured_media":32062,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_jetpack_memberships_contains_paid_content":false,"footnotes":""},"categories":[4099],"tags":[4614,4615,882,4616],"class_list":["post-32066","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-tutorials","tag-postfixdovecot","tag-spfdkim","tag-vps","tag-4616"],"aioseo_notices":[],"jetpack_featured_media_url":"https:\/\/cn.hostease.com\/blog\/wp-content\/uploads\/2026\/07\/vps-mail-server-setup-cover.webp","jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/cn.hostease.com\/blog\/wp-json\/wp\/v2\/posts\/32066","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/cn.hostease.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/cn.hostease.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/cn.hostease.com\/blog\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/cn.hostease.com\/blog\/wp-json\/wp\/v2\/comments?post=32066"}],"version-history":[{"count":1,"href":"https:\/\/cn.hostease.com\/blog\/wp-json\/wp\/v2\/posts\/32066\/revisions"}],"predecessor-version":[{"id":32073,"href":"https:\/\/cn.hostease.com\/blog\/wp-json\/wp\/v2\/posts\/32066\/revisions\/32073"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/cn.hostease.com\/blog\/wp-json\/wp\/v2\/media\/32062"}],"wp:attachment":[{"href":"https:\/\/cn.hostease.com\/blog\/wp-json\/wp\/v2\/media?parent=32066"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/cn.hostease.com\/blog\/wp-json\/wp\/v2\/categories?post=32066"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/cn.hostease.com\/blog\/wp-json\/wp\/v2\/tags?post=32066"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}