{"id":6273,"date":"2026-09-23T18:20:38","date_gmt":"2026-09-23T09:20:38","guid":{"rendered":"https:\/\/blog.eternalsphere.net\/?p=6273"},"modified":"2026-09-23T18:20:38","modified_gmt":"2026-09-23T09:20:38","slug":"607fbs4cz5m2mqb","status":"publish","type":"post","link":"https:\/\/blog.eternalsphere.net\/index.php\/2026\/09\/23\/607fbs4cz5m2mqb\/","title":{"rendered":"\u5bb6\u5ead\u7f51\u7edc\u4e2d\u7684 Mailcow\uff1a\u4ece\u53ea\u8bfb\u5b89\u5168\u5ba1\u8ba1\u5230 SPF\u3001DKIM\u3001DMARC \u5b9e\u9645\u9a8c\u8bc1"},"content":{"rendered":"\n<p class=\"wp-block-paragraph\">\u81ea\u5efa\u90ae\u4ef6\u670d\u52a1\u5668\u771f\u6b63\u56f0\u96be\u7684\u90e8\u5206\uff0c\u5f80\u5f80\u4e0d\u662f\u201c\u8ba9\u670d\u52a1\u8dd1\u8d77\u6765\u201d\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u5b89\u88c5 Mailcow\u3001\u521b\u5efa\u90ae\u7bb1\u3001\u90e8\u7f72 Webmail\u3001\u63a5\u6536\u5916\u90e8\u90ae\u4ef6\uff0c\u8fd9\u4e9b\u5de5\u4f5c\u867d\u7136\u590d\u6742\uff0c\u4f46\u901a\u5e38\u90fd\u6709\u76f8\u5bf9\u660e\u786e\u7684\u914d\u7f6e\u8def\u5f84\u3002\u771f\u6b63\u8fdb\u5165\u957f\u671f\u8fd0\u884c\u9636\u6bb5\u4ee5\u540e\uff0c\u66f4\u96be\u56de\u7b54\u7684\u662f\u53e6\u4e00\u7ec4\u95ee\u9898\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u90ae\u4ef6\u7a76\u7adf\u662f\u4e0d\u662f\u6309\u7167\u9884\u671f\u8def\u5f84\u53d1\u9001\uff1f<\/li>\n\n\n\n<li>SMTP Relay \u662f\u5426\u771f\u7684\u751f\u6548\uff1f<\/li>\n\n\n\n<li>SPF\u3001DKIM\u3001DMARC \u662f\u201c\u770b\u8d77\u6765\u914d\u7f6e\u6b63\u786e\u201d\uff0c\u8fd8\u662f\u6536\u4ef6\u65b9\u5b9e\u9645\u9a8c\u8bc1\u901a\u8fc7\uff1f<\/li>\n\n\n\n<li>\u53cd\u5411\u4ee3\u7406\u4e4b\u540e\u8fd8\u80fd\u4e0d\u80fd\u8bb0\u5f55\u771f\u5b9e\u5ba2\u6237\u7aef IP\uff1f<\/li>\n\n\n\n<li>\u516c\u7f51\u626b\u63cf\u662f\u5426\u4ee3\u8868\u670d\u52a1\u5668\u6b63\u5728\u906d\u53d7\u653b\u51fb\uff1f<\/li>\n\n\n\n<li>\u90ae\u4ef6\u670d\u52a1\u5668\u662f\u5426\u5b58\u5728 Open Relay\u3001\u8ba4\u8bc1\u66b4\u529b\u7834\u89e3\u3001\u961f\u5217\u5806\u79ef\u6216\u6027\u80fd\u74f6\u9888\uff1f<\/li>\n\n\n\n<li>\u5bb6\u5ead\u516c\u7f51 IP \u4e0d\u56fa\u5b9a\uff0c\u4f1a\u4e0d\u4f1a\u5f71\u54cd\u57df\u540d\u4fe1\u8a89\uff1f<\/li>\n\n\n\n<li>\u4e00\u4e2a\u957f\u671f\u8fd0\u884c\u7684\u5b9e\u4f8b\uff0c\u7a76\u7adf\u4ec0\u4e48\u65f6\u5019\u624d\u53ef\u4ee5\u8ba4\u4e3a\u201c\u5df2\u7ecf\u7a33\u5b9a\u201d\uff1f<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">\u4e00\u6b21\u5b8c\u6574\u7684 Mailcow \u53ea\u8bfb\u5ba1\u8ba1\u548c\u771f\u5b9e\u90ae\u4ef6\u6295\u9012\u6d4b\u8bd5\uff0c\u53ef\u4ee5\u628a\u8fd9\u4e9b\u95ee\u9898\u9010\u4e00\u56de\u7b54\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">\u4e00\u3001\u5ba1\u8ba1\u539f\u5219\uff1a\u5148\u8bc1\u660e\u73b0\u72b6\uff0c\u800c\u4e0d\u662f\u5148\u4fee\u6539\u914d\u7f6e<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">\u90ae\u4ef6\u670d\u52a1\u5668\u975e\u5e38\u4e0d\u9002\u5408\u91c7\u7528\u201c\u770b\u5230\u4e00\u4e2a\u8b66\u544a\u5c31\u6539\u4e00\u70b9\u201d\u7684\u6392\u969c\u65b9\u5f0f\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Postfix\u3001Dovecot\u3001Rspamd\u3001Nginx\u3001DNS\u3001TLS\u3001DKIM\u3001DMARC\u3001\u53cd\u5783\u573e\u7cfb\u7edf\u4ee5\u53ca\u7f51\u7edc\u5730\u5740\u8f6c\u6362\u4e4b\u95f4\u5b58\u5728\u5927\u91cf\u76f8\u4e92\u4f9d\u8d56\u3002\u4e00\u4e2a\u770b\u4f3c\u5408\u7406\u7684\u4fee\u6539\uff0c\u53ef\u80fd\u89e3\u51b3\u4e00\u4e2a\u95ee\u9898\uff0c\u540c\u65f6\u5236\u9020\u53e6\u4e00\u4e2a\u95ee\u9898\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u56e0\u6b64\u5ba1\u8ba1\u91c7\u7528\u4e86\u4e00\u4e2a\u7b80\u5355\u539f\u5219\uff1a<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>\u53ea\u8bfb\u3002<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u6574\u4e2a\u8fc7\u7a0b\u4e2d\u4e0d\u6267\u884c\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u914d\u7f6e\u4fee\u6539\uff1b<\/li>\n\n\n\n<li>Docker \u5bb9\u5668\u91cd\u542f\uff1b<\/li>\n\n\n\n<li>\u670d\u52a1 reload\uff1b<\/li>\n\n\n\n<li>\u90ae\u4ef6\u961f\u5217 flush\uff1b<\/li>\n\n\n\n<li>DNS \u4fee\u6539\uff1b<\/li>\n\n\n\n<li>\u6570\u636e\u5e93\u5199\u5165\uff1b<\/li>\n\n\n\n<li>\u9632\u706b\u5899\u8c03\u6574\uff1b<\/li>\n\n\n\n<li>\u4e3b\u52a8\u5236\u9020\u6545\u969c\uff1b<\/li>\n\n\n\n<li>\u4e3a\u6d4b\u8bd5\u800c\u4e34\u65f6\u6539\u53d8\u90ae\u4ef6\u6d41\u5411\u3002<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">\u53ea\u8bfb\u53d6\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Docker \u670d\u52a1\u72b6\u6001\uff1b<\/li>\n\n\n\n<li>Postfix\u3001Dovecot\u3001Rspamd\u3001Nginx \u7b49\u65e5\u5fd7\uff1b<\/li>\n\n\n\n<li>\u5f53\u524d\u751f\u6548\u914d\u7f6e\uff1b<\/li>\n\n\n\n<li>DNS \u8bb0\u5f55\uff1b<\/li>\n\n\n\n<li>TLS \u8bc1\u4e66\uff1b<\/li>\n\n\n\n<li>\u90ae\u4ef6\u961f\u5217\uff1b<\/li>\n\n\n\n<li>\u7f51\u7edc\u76d1\u542c\u72b6\u6001\uff1b<\/li>\n\n\n\n<li>\u8d44\u6e90\u4f7f\u7528\u60c5\u51b5\uff1b<\/li>\n\n\n\n<li>\u5b9e\u9645\u5916\u53d1\u90ae\u4ef6\u7684\u539f\u59cb\u90ae\u4ef6\u5934\u3002<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">\u8fd9\u6837\u5f97\u5230\u7684\u7ed3\u679c\u63cf\u8ff0\u7684\u662f<strong>\u7cfb\u7edf\u5f53\u524d\u771f\u5b9e\u5de5\u4f5c\u65b9\u5f0f<\/strong>\uff0c\u800c\u4e0d\u662f\u201c\u7ecf\u8fc7\u6d4b\u8bd5\u4fee\u6539\u540e\u7684\u72b6\u6001\u201d\u3002<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\" \/>\n\n\n\n<h2 class=\"wp-block-heading\">\u4e8c\u3001\u5178\u578b\u5bb6\u5ead Mailcow \u67b6\u6784<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">\u5ba1\u8ba1\u5bf9\u8c61\u91c7\u7528\u7684\u662f\u4e00\u79cd\u6bd4\u8f83\u5178\u578b\u7684\u5bb6\u5ead\u81ea\u5efa\u90ae\u4ef6\u67b6\u6784\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u6574\u4f53\u53ef\u4ee5\u62bd\u8c61\u4e3a\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>Internet\n   \u2502\n   \u25bc\nHome Router \/ NAT\n   \u2502\n   \u251c\u2500\u2500 SMTP \/ Submission \/ IMAPS\n   \u2502          \u2502\n   \u2502          \u25bc\n   \u2502       Mailcow\n   \u2502\n   \u2514\u2500\u2500 HTTPS\n          \u2502\n          \u25bc\n    Reverse Proxy\n          \u2502\n          \u25bc\n       Mailcow Web UI\n<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u5916\u53d1\u90ae\u4ef6\u5219\u91c7\u7528\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>Mailcow\n   \u2502\n   \u25bc\nExternal SMTP Relay\n   \u2502\n   \u25bc\nGmail \/ Outlook \/ Proton Mail \/ Other MX\n<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u8fd9\u79cd\u8bbe\u8ba1\u6709\u4e00\u4e2a\u5f88\u91cd\u8981\u7684\u7279\u70b9\uff1a<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>\u6536\u4fe1\u548c\u90ae\u4ef6\u6570\u636e\u4ecd\u7136\u7531\u81ea\u5df1\u7684 Mailcow \u63a7\u5236\uff0c\u4f46\u516c\u7f51\u5916\u53d1\u4ea4\u7ed9\u4e13\u4e1a SMTP Relay\u3002<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u5bf9\u4e8e\u5bb6\u5ead\u5bbd\u5e26\u6765\u8bf4\uff0c\u8fd9\u662f\u975e\u5e38\u5b9e\u9645\u7684\u4e00\u79cd\u67b6\u6784\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u5f88\u591a\u8fd0\u8425\u5546\u4f1a\u9650\u5236 TCP 25 \u51fa\u7ad9\uff0c\u5bb6\u5ead\u516c\u7f51 IP \u4e5f\u901a\u5e38\u4e0d\u5177\u5907\u9002\u5408\u76f4\u63a5\u6295\u9012\u5927\u578b\u90ae\u4ef6\u670d\u52a1\u5546\u7684\u957f\u671f IP Reputation\u3001PTR \u548c\u7f51\u7edc\u5c5e\u6027\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">SMTP Relay \u53ef\u4ee5\u89e3\u51b3\u8fd9\u4e00\u5c42\u95ee\u9898\uff0c\u800c\u57df\u540d\u3001\u90ae\u7bb1\u3001\u90ae\u4ef6\u6570\u636e\u3001DKIM \u8eab\u4efd\u548c\u7ba1\u7406\u6743\u4ecd\u7136\u53ef\u4ee5\u4fdd\u6301\u72ec\u7acb\u3002<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\" \/>\n\n\n\n<h2 class=\"wp-block-heading\">\u4e09\u3001\u516c\u7f51\u90ae\u4ef6\u670d\u52a1\u5668\u4e00\u5b9a\u4f1a\u88ab\u626b\u63cf<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">\u90ae\u4ef6\u670d\u52a1\u5668\u66b4\u9732\u5230\u516c\u7f51\u4ee5\u540e\uff0c\u5f88\u5feb\u5c31\u4f1a\u770b\u5230\u5927\u91cf\u964c\u751f\u8fde\u63a5\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">SMTP \u65e5\u5fd7\u4e2d\u5e38\u89c1\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>postscreen CONNECT\n<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">Web \u65e5\u5fd7\u4e2d\u53ef\u80fd\u51fa\u73b0\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>\/wp-login.php\n\/xmlrpc.php\n\/.env\n\/.git\/config\n\/.aws\/credentials\n<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">IMAP\u3001Submission\u3001SMTPS \u4e5f\u4f1a\u51fa\u73b0\u53ea\u8fde\u63a5\u51e0\u79d2\u4fbf\u65ad\u5f00\u7684\u5ba2\u6237\u7aef\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u5176\u4e2d\u4e00\u4e9b\u6765\u6e90\u751a\u81f3\u5e26\u6709\u660e\u663e\u7684\u4e92\u8054\u7f51\u6d4b\u7ed8\u4e3b\u673a\u540d\uff0c\u4f8b\u5982\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u7f51\u7edc\u5b89\u5168\u7814\u7a76\u673a\u6784\uff1b<\/li>\n\n\n\n<li>Internet-wide scanner\uff1b<\/li>\n\n\n\n<li>\u8d44\u4ea7\u641c\u7d22\u5e73\u53f0\uff1b<\/li>\n\n\n\n<li>\u81ea\u52a8\u6f0f\u6d1e\u626b\u63cf\u5668\u3002<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">\u8fd9\u7c7b\u8fde\u63a5\u5f88\u5bb9\u6613\u8ba9\u7b2c\u4e00\u6b21\u7ef4\u62a4\u516c\u7f51\u670d\u52a1\u7684\u4eba\u4ea7\u751f\u4e00\u79cd\u9519\u89c9\uff1a<\/p>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<p class=\"wp-block-paragraph\">\u201c\u670d\u52a1\u5668\u662f\u4e0d\u662f\u5df2\u7ecf\u88ab\u653b\u51fb\u4e86\uff1f\u201d<\/p>\n<\/blockquote>\n\n\n\n<p class=\"wp-block-paragraph\">\u5b9e\u9645\u4e0a\u9700\u8981\u8fdb\u4e00\u6b65\u533a\u5206\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u626b\u63cf\u4e0d\u7b49\u4e8e\u5165\u4fb5<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">\u5ba1\u8ba1\u4e2d\u89c2\u5bdf\u5230\u7684\u5927\u90e8\u5206\u516c\u7f51\u8bbf\u95ee\u5c5e\u4e8e\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u7aef\u53e3\u53d1\u73b0\uff1b<\/li>\n\n\n\n<li>SMTP \u670d\u52a1\u8bc6\u522b\uff1b<\/li>\n\n\n\n<li>STARTTLS \u80fd\u529b\u63a2\u6d4b\uff1b<\/li>\n\n\n\n<li>Web \u6280\u672f\u6808\u8bc6\u522b\uff1b<\/li>\n\n\n\n<li>WordPress \u8def\u5f84\u626b\u63cf\uff1b<\/li>\n\n\n\n<li>\u914d\u7f6e\u6587\u4ef6\u6cc4\u6f0f\u626b\u63cf\uff1b<\/li>\n\n\n\n<li>Internet-wide measurement\u3002<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">\u771f\u6b63\u66f4\u503c\u5f97\u5173\u6ce8\u7684\u5219\u662f\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>SMTP AUTH \u8fde\u7eed\u5931\u8d25\uff1b<\/li>\n\n\n\n<li>IMAP \u5bc6\u7801\u7206\u7834\uff1b<\/li>\n\n\n\n<li>\u6210\u529f\u767b\u5f55\u6765\u81ea\u672a\u77e5\u516c\u7f51\u6765\u6e90\uff1b<\/li>\n\n\n\n<li>Open Relay\uff1b<\/li>\n\n\n\n<li>Web \u7ba1\u7406\u754c\u9762\u8ba4\u8bc1\u7ed5\u8fc7\uff1b<\/li>\n\n\n\n<li>\u654f\u611f\u6587\u4ef6\u8fd4\u56de 200\uff1b<\/li>\n\n\n\n<li>SMTP \u961f\u5217\u4e2d\u51fa\u73b0\u5f02\u5e38\u5916\u53d1\uff1b<\/li>\n\n\n\n<li>\u88ab\u5165\u4fb5\u8d26\u6237\u5927\u91cf\u53d1\u9001\u90ae\u4ef6\u3002<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">\u5728\u8fd9\u6b21\u5ba1\u8ba1\u4e2d\uff0c\u6ca1\u6709\u53d1\u73b0\u8fd9\u4e9b\u9ad8\u98ce\u9669\u8bc1\u636e\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u56e0\u6b64\uff1a<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>\u201c\u516c\u7f51\u626b\u63cf\u5f88\u591a\u201d\u672c\u8eab\u4e0d\u662f\u90ae\u4ef6\u670d\u52a1\u5668\u5f02\u5e38\u3002<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u5b83\u53ea\u662f\u516c\u5f00\u670d\u52a1\u8fdb\u5165\u4e92\u8054\u7f51\u4e4b\u540e\u7684\u6b63\u5e38\u80cc\u666f\u566a\u58f0\u3002<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\" \/>\n\n\n\n<h2 class=\"wp-block-heading\">\u56db\u3001\u4e0d\u8981\u7528\u7c97\u7cd9\u7684\u6b63\u5219\u7edf\u8ba1\u201c\u653b\u51fb IP\u201d<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">\u65e5\u5fd7\u5206\u6790\u4e2d\u8fd8\u6709\u4e00\u4e2a\u975e\u5e38\u5bb9\u6613\u51fa\u73b0\u7684\u9519\u8bef\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u4f8b\u5982\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>grep -Eo '(&#091;0-9]{1,3}\\.){3}&#091;0-9]{1,3}'\n<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u8868\u9762\u4e0a\u662f\u5728\u63d0\u53d6 IPv4\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u4f46\u73b0\u4ee3 Web \u65e5\u5fd7\u4e2d\u7ecf\u5e38\u5305\u542b\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>Chrome\/xxx.0.0.0\n<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u4e8e\u662f\u6d4f\u89c8\u5668\u7248\u672c\u53f7\u4e5f\u4f1a\u88ab\u9519\u8bef\u7edf\u8ba1\u6210\u201cIP\u201d\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u6700\u7ec8\u53ef\u80fd\u5f97\u5230\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>xxx.0.0.0\n<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u51fa\u73b0\u6570\u767e\u6b21\uff0c\u7136\u540e\u88ab\u8bef\u8ba4\u4e3a\u6700\u5927\u653b\u51fb\u6e90\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u6b63\u786e\u65b9\u5f0f\u5e94\u8be5\u6839\u636e\u65e5\u5fd7\u7c7b\u578b\u63d0\u53d6<strong>\u771f\u5b9e\u5ba2\u6237\u7aef\u5b57\u6bb5<\/strong>\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Postfix\uff1a<code>CONNECT from [IP]<\/code><\/li>\n\n\n\n<li>Dovecot\uff1a<code>rip=<\/code><\/li>\n\n\n\n<li>Nginx\uff1aaccess log \u7684\u5ba2\u6237\u7aef\u5730\u5740\u5b57\u6bb5<\/li>\n\n\n\n<li>Netfilter\uff1a\u660e\u786e\u7684 ban\/fail \u6765\u6e90<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">\u5b89\u5168\u5206\u6790\u4e2d\uff0c\u201c\u5b57\u6bb5\u8bed\u4e49\u201d\u8fdc\u6bd4\u7b80\u5355\u6b63\u5219\u91cd\u8981\u3002<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\" \/>\n\n\n\n<h2 class=\"wp-block-heading\">\u4e94\u3001SMTP Relay \u662f\u5426\u771f\u6b63\u63a5\u7ba1\u4e86\u5916\u53d1\uff1f<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Mailcow \u914d\u7f6e SMTP Relay \u4ee5\u540e\uff0c\u4e0d\u80fd\u53ea\u770b\u7ba1\u7406\u754c\u9762\u91cc\u6709\u6ca1\u6709\u4e00\u6761 Relay \u914d\u7f6e\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u771f\u6b63\u9700\u8981\u786e\u8ba4\u7684\u662f\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>Mailcow\n   \u2193\nRelay Host\n   \u2193\n250 OK\n<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u540c\u65f6\u8fd8\u8981\u786e\u8ba4\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>Relay unavailable\n   \u2193\nPostfix defer \/ queue\n<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u800c\u4e0d\u662f\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>Relay unavailable\n   \u2193\nFallback\n   \u2193\nDirect delivery to Gmail \/ Outlook \/ Proton MX\n<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u6b64\u6b21\u5ba1\u8ba1\u901a\u8fc7 Postfix \u5f53\u524d\u914d\u7f6e\u548c\u5b9e\u9645\u65e5\u5fd7\u786e\u8ba4\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u5916\u53d1\u90ae\u4ef6\u4f7f\u7528\u5916\u90e8 SMTP Relay\uff1b<\/li>\n\n\n\n<li>SMTP AUTH \u5df2\u542f\u7528\uff1b<\/li>\n\n\n\n<li>TLS \u8fde\u63a5\u6b63\u5e38\uff1b<\/li>\n\n\n\n<li>Relay \u8fd4\u56de <code>250 OK<\/code>\uff1b<\/li>\n\n\n\n<li>\u6ca1\u6709\u914d\u7f6e\u81ea\u52a8 MX fallback\uff1b<\/li>\n\n\n\n<li>Relay \u4e34\u65f6\u4e0d\u53ef\u7528\u65f6\uff0c\u90ae\u4ef6\u5e94\u4fdd\u7559\u5728 Postfix \u961f\u5217\u5e76 defer\uff1b<\/li>\n\n\n\n<li>\u5f53\u524d\u90ae\u4ef6\u961f\u5217\u4e3a\u7a7a\u3002<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">\u65e9\u671f\u65e5\u5fd7\u4e2d\u4ecd\u7136\u51fa\u73b0\u8fc7\u76f4\u63a5\u8fde\u63a5 Gmail\u3001Proton \u7b49\u76ee\u6807 MX \u7684\u8bb0\u5f55\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u4f46\u8fdb\u4e00\u6b65\u6309\u7167 Queue ID \u548c\u65f6\u95f4\u7ebf\u5206\u6790\u540e\u53d1\u73b0\uff0c\u90a3\u4e9b\u5c5e\u4e8e<strong>\u5207\u6362 SMTP Relay \u4ee5\u524d\u9057\u7559\u4e0b\u6765\u7684\u65e7\u90ae\u4ef6\u961f\u5217\u91cd\u8bd5<\/strong>\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u65b0\u7684\u90ae\u4ef6\u5df2\u7ecf\u5168\u90e8\u8d70 Relay\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u8fd9\u8bf4\u660e\u4e00\u4e2a\u91cd\u8981\u539f\u5219\uff1a<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>\u65e5\u5fd7\u5fc5\u987b\u7ed3\u5408\u65f6\u95f4\u7ebf\u5206\u6790\u3002<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u65e7\u9519\u8bef\u5b58\u5728\u4e8e\u65e5\u5fd7\u4e2d\uff0c\u4e0d\u4ee3\u8868\u5f53\u524d\u914d\u7f6e\u4ecd\u7136\u9519\u8bef\u3002<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\" \/>\n\n\n\n<h2 class=\"wp-block-heading\">\u516d\u3001SPF \u4e0d\u80fd\u53ea\u770b\u6839\u57df TXT<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">\u5f88\u591a\u90ae\u4ef6\u914d\u7f6e\u68c0\u67e5\u4f1a\u76f4\u63a5\u8fd0\u884c\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>TXT example.com\n<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u7136\u540e\u770b\u5230\u7c7b\u4f3c\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>v=spf1 a mx ip4:x.x.x.x ~all\n<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u5982\u679c\u5176\u4e2d\u6ca1\u6709\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>include:\u67d0SMTP\u670d\u52a1\u5546\n<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u4fbf\u5f97\u51fa\uff1a<\/p>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<p class=\"wp-block-paragraph\">SMTP Relay \u7684 SPF \u6ca1\u6709\u914d\u7f6e\u3002<\/p>\n<\/blockquote>\n\n\n\n<p class=\"wp-block-paragraph\">\u8fd9\u79cd\u5224\u65ad\u5e76\u4e0d\u4e00\u5b9a\u6b63\u786e\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u73b0\u4ee3 SMTP Relay \u7ecf\u5e38\u4f7f\u7528\u72ec\u7acb\u7684 Return-Path \u5b50\u57df\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u4f8b\u5982\u6700\u7ec8\u90ae\u4ef6\u53ef\u80fd\u53d8\u6210\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>From:\nuser@example.com\n\nReturn-Path:\nbounce-xxxxx@relay-id.example.com\n<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">SPF \u68c0\u67e5\u7684\u662f SMTP Envelope From\uff0c\u4e5f\u5c31\u662f Return-Path \u5bf9\u5e94\u7684\u57df\uff0c\u800c\u4e0d\u4e00\u5b9a\u662f\u7528\u6237\u770b\u5230\u7684 Header From\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u56e0\u6b64\u53ef\u80fd\u51fa\u73b0\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>Header From:\nexample.com\n\nSPF authentication domain:\nrelay-id.example.com\n<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u53ea\u8981\u540e\u8005\u662f\u524d\u8005\u7684\u5b50\u57df\uff0c\u5e76\u4e14\u7b26\u5408 DMARC alignment \u89c4\u5219\uff0c\u5c31\u53ef\u4ee5\u6b63\u5e38\u901a\u8fc7\u8ba4\u8bc1\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u6240\u4ee5 SPF \u662f\u5426\u771f\u6b63\u6b63\u786e\uff0c\u6700\u7ec8\u5e94\u8be5\u770b\uff1a<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>\u6536\u4ef6\u670d\u52a1\u5668\u751f\u6210\u7684 Authentication-Results\u3002<\/strong><\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\" \/>\n\n\n\n<h2 class=\"wp-block-heading\">\u4e03\u3001\u771f\u5b9e Gmail \u90ae\u4ef6\u5934\u7ed9\u51fa\u4e86\u6700\u7ec8\u7b54\u6848<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">\u5b8c\u6210\u670d\u52a1\u5668\u4fa7\u5ba1\u8ba1\u4ee5\u540e\uff0c\u53c8\u5b9e\u9645\u53d1\u9001\u4e86\u4e00\u5c01\u666e\u901a\u6d4b\u8bd5\u90ae\u4ef6\u5230 Gmail\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u6d4b\u8bd5\u5185\u5bb9\u975e\u5e38\u666e\u901a\uff0c\u6ca1\u6709\u9644\u4ef6\u3001\u8425\u9500\u5185\u5bb9\u6216\u590d\u6742 HTML\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Gmail \u6536\u4ef6\u7aef\u4ea7\u751f\u7684\u539f\u59cb\u90ae\u4ef6\u5934\u660e\u786e\u7ed9\u51fa\u4e86\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>spf=pass\ndkim=pass\ndmarc=pass\n<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u8fd9\u6bd4\u4efb\u4f55\u672c\u5730 DNS \u68c0\u67e5\u90fd\u66f4\u6709\u610f\u4e49\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u56e0\u4e3a\u8fd9\u4ee3\u8868\uff1a<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>\u771f\u5b9e\u5916\u90e8\u90ae\u4ef6\u670d\u52a1\u5546\u5df2\u7ecf\u5b9e\u9645\u5b8c\u6210\u9a8c\u8bc1\u3002<\/strong><\/p>\n\n\n\n<h3 class=\"wp-block-heading\">SPF<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Gmail \u770b\u5230\u7684 Envelope From \u4f7f\u7528\u4e86 SMTP Relay \u521b\u5efa\u7684\u4e13\u7528 Return-Path \u5b50\u57df\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u540c\u65f6 Gmail \u660e\u786e\u786e\u8ba4\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>spf=pass\n<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u8fd9\u8bc1\u660e\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>SMTP Relay \u7684 Sender Domain \u914d\u7f6e\u5df2\u7ecf\u751f\u6548\uff1b<\/li>\n\n\n\n<li>\u4e13\u7528 Return-Path DNS \u5de5\u4f5c\u6b63\u5e38\uff1b<\/li>\n\n\n\n<li>Relay \u5b9e\u9645\u51fa\u53e3 IP \u88ab SPF \u6b63\u786e\u6388\u6743\uff1b<\/li>\n\n\n\n<li>SPF authentication domain \u6b63\u5e38\u3002<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">DKIM<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">\u90ae\u4ef6\u4e2d\u51fa\u73b0\u4e86\u591a\u4e2a DKIM \u7b7e\u540d\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u5176\u4e2d\u5305\u62ec\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>d=example.com\n<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u7531\u672c\u5730 Mailcow \u6dfb\u52a0\u7684\u7b7e\u540d\uff1b<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u53e6\u4e00\u4e2a\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>d=example.com\n<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u7531 SMTP Relay \u4e3a\u5ba2\u6237\u57df\u540d\u8ffd\u52a0\u7684\u7b7e\u540d\uff1b<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u4ee5\u53ca Relay \u670d\u52a1\u5546\u81ea\u5df1\u7684\u670d\u52a1\u57df DKIM\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Gmail \u5bf9\u8fd9\u4e9b\u7b7e\u540d\u5747\u8fd4\u56de\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>dkim=pass\n<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u8fd9\u8bf4\u660e\u591a DKIM \u7b7e\u540d\u672c\u8eab\u5e76\u4e0d\u662f\u51b2\u7a81\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u53ea\u8981\u6bcf\u4e2a\u7b7e\u540d\u72ec\u7acb\u6709\u6548\uff0c\u5b83\u4eec\u53ef\u4ee5\u540c\u65f6\u5b58\u5728\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u5c24\u5176\u91cd\u8981\u7684\u662f\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>d=example.com\n<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u4e0e\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>From: user@example.com\n<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u5b8c\u5168\u4e00\u81f4\uff0c\u56e0\u6b64 DKIM alignment \u76f4\u63a5\u6210\u7acb\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">DMARC<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">\u6700\u7ec8\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>dmarc=pass\n<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u8fd9\u610f\u5473\u7740\u81f3\u5c11\u4e00\u4e2a\u7ecf\u8fc7\u9a8c\u8bc1\u7684 SPF \u6216 DKIM \u8eab\u4efd\u4e0e Header From \u6ee1\u8db3 DMARC alignment\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u56e0\u6b64\u90ae\u4ef6\u5b8c\u6574\u901a\u8fc7\u4e86\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>SPF   PASS\nDKIM  PASS\nDMARC PASS\n<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u8fd9\u5df2\u7ecf\u5c5e\u4e8e\u5b8c\u6574\u7684\u7aef\u5230\u7aef\u9a8c\u8bc1\u3002<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\" \/>\n\n\n\n<h2 class=\"wp-block-heading\">\u516b\u3001\u8fdb\u5165 Gmail Inbox \u8bf4\u660e\u4e86\u4ec0\u4e48\uff1f<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">\u8fd9\u5c01\u771f\u5b9e\u90ae\u4ef6\u6700\u7ec8\u8fdb\u5165\u4e86 Gmail \u7684\u6b63\u5e38\u6536\u4ef6\u7bb1\uff0c\u800c\u4e0d\u662f Spam\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u8fd9\u662f\u4e00\u4e2a\u79ef\u6781\u4fe1\u53f7\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u5b83\u81f3\u5c11\u8bc1\u660e\u5728\u8fd9\u4e00\u6b21\u771f\u5b9e\u6295\u9012\u4e2d\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Gmail \u63a5\u53d7\u4e86\u90ae\u4ef6\uff1b<\/li>\n\n\n\n<li>\u90ae\u4ef6\u8ba4\u8bc1\u5168\u90e8\u6b63\u5e38\uff1b<\/li>\n\n\n\n<li>\u6ca1\u6709\u56e0\u4e3a\u5f53\u524d\u53d1\u9001\u8def\u5f84\u76f4\u63a5\u88ab\u5224\u5b9a\u4e3a Spam\uff1b<\/li>\n\n\n\n<li>SMTP Relay \u7684\u5f53\u524d\u51fa\u53e3\u4fe1\u8a89\u8db3\u4ee5\u6b63\u5e38\u6295\u9012\uff1b<\/li>\n\n\n\n<li>\u90ae\u4ef6\u5185\u5bb9\u6ca1\u6709\u89e6\u53d1\u660e\u663e\u5783\u573e\u90ae\u4ef6\u89c4\u5219\u3002<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">\u4f46\u8fd9\u4e0d\u80fd\u7406\u89e3\u4e3a\uff1a<\/p>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<p class=\"wp-block-paragraph\">\u201c\u4e00\u5c01\u8fdb Inbox\uff0c\u57df\u540d\u5c31\u83b7\u5f97\u4e86\u5f88\u9ad8\u7684\u4fe1\u8a89\u3002\u201d<\/p>\n<\/blockquote>\n\n\n\n<p class=\"wp-block-paragraph\">\u90ae\u4ef6\u4fe1\u8a89\u662f\u957f\u671f\u884c\u4e3a\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u5927\u578b\u90ae\u4ef6\u63d0\u4f9b\u5546\u901a\u5e38\u4f1a\u7efc\u5408\u89c2\u5bdf\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Domain Reputation\uff1b<\/li>\n\n\n\n<li>IP Reputation\uff1b<\/li>\n\n\n\n<li>SPF \/ DKIM \/ DMARC \u7a33\u5b9a\u6027\uff1b<\/li>\n\n\n\n<li>\u7528\u6237 Spam \u6295\u8bc9\uff1b<\/li>\n\n\n\n<li>\u9000\u4fe1\u7387\uff1b<\/li>\n\n\n\n<li>\u53d1\u4fe1\u91cf\u53d8\u5316\uff1b<\/li>\n\n\n\n<li>\u5386\u53f2\u53d1\u9001\u884c\u4e3a\uff1b<\/li>\n\n\n\n<li>\u90ae\u4ef6\u5185\u5bb9\uff1b<\/li>\n\n\n\n<li>\u7528\u6237\u4e92\u52a8\uff1b<\/li>\n\n\n\n<li>\u6076\u610f\u94fe\u63a5\u6216\u9644\u4ef6\u5386\u53f2\u3002<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">\u56e0\u6b64\u66f4\u51c6\u786e\u7684\u8bf4\u6cd5\u662f\uff1a<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>\u6280\u672f\u8eab\u4efd\u94fe\u5df2\u7ecf\u5efa\u7acb\u6b63\u786e\uff0c\u57df\u540d\u5177\u5907\u81ea\u7136\u79ef\u7d2f\u6b63\u5e38\u53d1\u4fe1\u5386\u53f2\u7684\u57fa\u7840\u3002<\/strong><\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\" \/>\n\n\n\n<h2 class=\"wp-block-heading\">\u4e5d\u3001\u57df\u540d\u4fe1\u8a89\u4e0e SMTP Relay IP \u4fe1\u8a89\u662f\u4e24\u56de\u4e8b<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">SMTP Relay \u67b6\u6784\u4e0b\uff0c\u81f3\u5c11\u5b58\u5728\u4e24\u5c42\u4fe1\u8a89\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u7b2c\u4e00\u5c42\uff1a\u53d1\u9001 IP Reputation<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">\u771f\u6b63\u4e0e Gmail \u5efa\u7acb SMTP \u8fde\u63a5\u7684\u662f Relay \u7684\u516c\u7f51 IP\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u56e0\u6b64\u8fd9\u90e8\u5206 IP Reputation \u4e3b\u8981\u7531 Relay \u670d\u52a1\u5546\u7ef4\u62a4\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u5bb6\u5ead\u5bbd\u5e26\u81ea\u5df1\u7684\u516c\u7f51 IP \u4e0d\u9700\u8981\u627f\u62c5\u4e3b\u8981\u7684\u5916\u53d1 IP Reputation\u3002<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">\u7b2c\u4e8c\u5c42\uff1aDomain Reputation<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">\u90ae\u4ef6\u4e2d\u4ecd\u7136\u5305\u542b\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>From: user@example.com\n<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u5e76\u4e14 DKIM\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>d=example.com\n<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">DMARC\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>header.from=example.com\n<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u5747\u6b63\u5e38\u5bf9\u9f50\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u56e0\u6b64 Gmail \u4ecd\u7136\u80fd\u591f\u660e\u786e\u8bc6\u522b\uff1a<\/p>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<p class=\"wp-block-paragraph\">\u8fd9\u5c01\u90ae\u4ef6\u4ee3\u8868\u7684\u662f example.com\u3002<\/p>\n<\/blockquote>\n\n\n\n<p class=\"wp-block-paragraph\">\u4e5f\u5c31\u662f\u8bf4\uff1a<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>\u4f7f\u7528 SMTP Relay \u5e76\u4e0d\u4f1a\u963b\u6b62\u81ea\u5df1\u7684\u57df\u540d\u5efa\u7acb Domain Reputation\u3002<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u8fd9\u5bf9\u5bb6\u5ead\u81ea\u5efa\u90ae\u4ef6\u670d\u52a1\u5668\u5c24\u5176\u91cd\u8981\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u53ef\u4ee5\u628a\u6700\u56f0\u96be\u7684\u516c\u7f51 IP \u4fe1\u8a89\u5c42\u4ea4\u7ed9 Relay\uff0c\u540c\u65f6\u7ee7\u7eed\u79ef\u7d2f\u81ea\u5df1\u7684\u57df\u540d\u8eab\u4efd\u5386\u53f2\u3002<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\" \/>\n\n\n\n<h2 class=\"wp-block-heading\">\u5341\u3001\u5bb6\u5ead\u516c\u7f51 IP \u4e0d\u56fa\u5b9a\u600e\u4e48\u529e\uff1f<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">\u5bb6\u5ead\u5bbd\u5e26\u516c\u7f51 IPv4 \u53ef\u80fd\u5076\u5c14\u53d8\u5316\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u5982\u679c SMTP Relay \u5df2\u7ecf\u627f\u62c5\u5916\u53d1\uff0c\u5219\u516c\u7f51 IP \u53d8\u5316\u4e3b\u8981\u5f71\u54cd\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>MX \u6536\u4fe1\u5165\u53e3\uff1b<\/li>\n\n\n\n<li>A \u8bb0\u5f55\uff1b<\/li>\n\n\n\n<li>HTTPS\uff1b<\/li>\n\n\n\n<li>IMAP\uff1b<\/li>\n\n\n\n<li>SMTP \u63a5\u6536\uff1b<\/li>\n\n\n\n<li>Certificate Challenge\uff1b<\/li>\n\n\n\n<li>DNS \u4e2d\u786c\u7f16\u7801\u7684 IP\u3002<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">\u800c\u4e0d\u662f\u4e3b\u8981\u5f71\u54cd SMTP Relay \u7684\u5916\u53d1 Reputation\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u5982\u679c SPF \u4e2d\u5b58\u5728\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>ip4:\u65e7\u516c\u7f51IP\n<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u90a3\u4e48\u516c\u7f51 IP \u6539\u53d8\u540e\u9700\u8981\u7279\u522b\u6ce8\u610f\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>a\nmx\n<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u4f1a\u968f\u7740 DNS A \u8bb0\u5f55\u66f4\u65b0\uff1b<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u4f46\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>ip4:x.x.x.x\n<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u4e0d\u4f1a\u81ea\u52a8\u6539\u53d8\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u5982\u679c\u65e7\u5730\u5740\u4ee5\u540e\u5206\u914d\u7ed9\u5176\u4ed6\u7528\u6237\uff0c\u90a3\u4e48\u65e7 <code>ip4:<\/code> \u5c06\u7ee7\u7eed\u6388\u6743\u8be5\u5730\u5740\u4ee3\u8868\u57df\u540d\u53d1\u9001\u90ae\u4ef6\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u56e0\u6b64\u4eba\u5de5\u516c\u7f51 IP \u66f4\u65b0\u6d41\u7a0b\u4e2d\u5e94\u8be5\u52a0\u5165\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>WAN IP\n\u2192 A records\n\u2192 MX resolution\n\u2192 SPF ip4\n\u2192 SMTP\/IMAP\/HTTPS verification\n<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u5bf9\u4e8e\u4e00\u5e74\u624d\u5076\u5c14\u53d1\u751f\u4e00\u6b21\u7684\u516c\u7f51 IP \u53d8\u5316\uff0c\u6ca1\u6709\u5fc5\u8981\u4e3a\u4e86\u8fd9\u4e00\u70b9\u5f3a\u884c\u90e8\u7f72\u590d\u6742 DDNS\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u7b80\u5355\u3001\u660e\u786e\u7684\u4eba\u5de5\u6d41\u7a0b\u53cd\u800c\u66f4\u5bb9\u6613\u7ef4\u62a4\u3002<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\" \/>\n\n\n\n<h2 class=\"wp-block-heading\">\u5341\u4e00\u3001\u53cd\u5411\u4ee3\u7406\u4e0e\u771f\u5b9e\u5ba2\u6237\u7aef IP<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Mailcow Web UI \u7ecf Nginx \u7b49\u53cd\u5411\u4ee3\u7406\u4ee5\u540e\uff0c\u8fd8\u9700\u8981\u8003\u8651\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>X-Forwarded-For\nX-Real-IP\nreal_ip_header\nreal_ip_recursive\nTRUSTED_PROXIES\n<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u5982\u679c\u914d\u7f6e\u9519\u8bef\uff0cMailcow \u53ef\u80fd\u53ea\u770b\u5230\u53cd\u5411\u4ee3\u7406\u670d\u52a1\u5668\u7684\u5185\u7f51\u5730\u5740\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u6b64\u6b21\u5ba1\u8ba1\u4e2d\uff0c\u5b9e\u9645\u65e5\u5fd7\u80fd\u591f\u770b\u5230\u516c\u7f51\u626b\u63cf\u6765\u6e90\uff0c\u56e0\u6b64\u771f\u5b9e\u5ba2\u6237\u7aef IP \u8f6c\u53d1\u94fe\u5df2\u7ecf\u5de5\u4f5c\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u65e9\u671f\u5ba1\u8ba1\u4e00\u5ea6\u628a\u8f83\u5927\u7684 RFC1918 trusted proxy \u8303\u56f4\u5224\u5b9a\u4e3a\u4e2d\u7b49\u98ce\u9669\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u8fdb\u4e00\u6b65\u7ed3\u5408\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Nginx <code>real_ip_recursive<\/code> \u5b9e\u9645\u884c\u4e3a\uff1b<\/li>\n\n\n\n<li>\u516c\u7f51\u53ea\u6709\u53cd\u5411\u4ee3\u7406\u5165\u53e3\uff1b<\/li>\n\n\n\n<li>Mailcow Web backend \u6ca1\u6709\u516c\u7f51 DNAT\uff1b<\/li>\n\n\n\n<li>LAN \u5c5e\u4e8e\u53ef\u4fe1\u5bb6\u5ead\u7f51\u7edc\uff1b<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">\u6700\u7ec8\u5c06\u5176\u964d\u7ea7\u4e3a\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>Informational \/ optional hardening\n<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u4e5f\u5c31\u662f\u8bf4\uff1a<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u5c06 <code>TRUSTED_PROXIES<\/code> \u6536\u7a84\u4e3a\u5355\u4e00\u53cd\u5411\u4ee3\u7406\u5730\u5740\u662f\u66f4\u6f02\u4eae\u7684\u914d\u7f6e\uff0c\u4f46\u5e76\u4e0d\u5b58\u5728\u5df2\u7ecf\u8bc1\u5b9e\u7684\u516c\u7f51\u5b89\u5168\u6f0f\u6d1e\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u8fd9\u662f\u5b89\u5168\u5ba1\u8ba1\u4e2d\u53e6\u4e00\u4e2a\u5f88\u91cd\u8981\u7684\u539f\u5219\uff1a<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>\u201c\u53ef\u4ee5\u66f4\u4e25\u683c\u201d\u4e0d\u7b49\u4e8e\u201c\u5f53\u524d\u5b58\u5728\u6f0f\u6d1e\u201d\u3002<\/strong><\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\" \/>\n\n\n\n<h2 class=\"wp-block-heading\">\u5341\u4e8c\u3001TLS \u8bc1\u4e66\u4e5f\u9700\u8981\u68c0\u67e5\u201c\u7eed\u671f\u94fe\u201d\uff0c\u800c\u4e0d\u4ec5\u4ec5\u662f\u6709\u6548\u671f<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">\u53ea\u8fd0\u884c\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>openssl s_client\n<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u786e\u8ba4\u5f53\u524d\u8bc1\u4e66\u6ca1\u6709\u8fc7\u671f\u8fd8\u4e0d\u591f\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u771f\u6b63\u9700\u8981\u77e5\u9053\u7684\u662f\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>\u8c01\u7b7e\u53d1\uff1f\n\u8c01\u7eed\u671f\uff1f\n\u8c01\u90e8\u7f72\uff1f\n\u90e8\u7f72\u5230\u54ea\u91cc\uff1f\n\u7eed\u671f\u540e\u54ea\u4e9b\u670d\u52a1 reload\uff1f\n<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u6b64\u6b21\u5ba1\u8ba1\u6700\u7ec8\u786e\u8ba4\u4e86\u4e00\u6761\u5b8c\u6574\u94fe\u8def\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>ACME timer\n   \u2193\nCertificate renewal\n   \u2193\nReverse Proxy\n   \u2193\nDeploy hook\n   \u2193\nMailcow certificate directory\n   \u2193\nNginx \/ Postfix \/ Dovecot reload\n<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u5e76\u4e14\u4ee3\u7406\u8282\u70b9\u548c Mailcow \u5f53\u524d\u4f7f\u7528\u7684\u516c\u5f00\u8bc1\u4e66\u5185\u5bb9\u4e00\u81f4\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u8fd9\u6bd4\u5355\u7eaf\u770b\u5230\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>expires in 80 days\n<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u66f4\u6709\u610f\u4e49\u3002<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\" \/>\n\n\n\n<h2 class=\"wp-block-heading\">\u5341\u4e09\u3001\u6027\u80fd\u65b9\u9762\u6ca1\u6709\u5fc5\u8981\u8fc7\u5ea6\u4f18\u5316<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">\u90ae\u4ef6\u670d\u52a1\u5668\u4e2d\u6bd4\u8f83\u663e\u773c\u7684\u8d44\u6e90\u6d88\u8d39\u8005\u901a\u5e38\u5305\u62ec\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>ClamAV\uff1b<\/li>\n\n\n\n<li>Rspamd\uff1b<\/li>\n\n\n\n<li>MySQL\uff1b<\/li>\n\n\n\n<li>SOGo\uff1b<\/li>\n\n\n\n<li>Redis\uff1b<\/li>\n\n\n\n<li>Dovecot\u3002<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">\u5176\u4e2d ClamAV \u5360\u7528\u63a5\u8fd1 1 GiB RAM \u5e76\u4e0d\u7f55\u89c1\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u5982\u679c\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u7cfb\u7edf\u4ecd\u6709\u5927\u91cf Available Memory\uff1b<\/li>\n\n\n\n<li>\u6ca1\u6709 Swap Thrashing\uff1b<\/li>\n\n\n\n<li>\u6ca1\u6709 OOM\uff1b<\/li>\n\n\n\n<li>\u5bb9\u5668\u6ca1\u6709\u91cd\u542f\uff1b<\/li>\n\n\n\n<li>CPU \u8d1f\u8f7d\u4f4e\uff1b<\/li>\n\n\n\n<li>\u961f\u5217\u6b63\u5e38\uff1b<\/li>\n\n\n\n<li>\u90ae\u4ef6\u5ef6\u8fdf\u6b63\u5e38\uff1b<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">\u90a3\u4e48\u4ec5\u4ec5\u56e0\u4e3a\u67d0\u4e2a\u5bb9\u5668\u201c\u770b\u8d77\u6765\u7528\u4e86\u5f88\u591a\u5185\u5b58\u201d\uff0c\u5e76\u4e0d\u80fd\u5224\u5b9a\u6027\u80fd\u5f02\u5e38\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u78c1\u76d8\u540c\u7406\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u4f8b\u5982\u6587\u4ef6\u7cfb\u7edf\u4f7f\u7528\u7387\u8d85\u8fc7 80%\uff0c\u5982\u679c\u4ecd\u7136\u6709\u63a5\u8fd1 TB \u7ea7\u522b\u7684\u5b9e\u9645\u53ef\u7528\u7a7a\u95f4\uff0c\u5e76\u4e14\u589e\u957f\u901f\u5ea6\u7a33\u5b9a\uff0c\u5c31\u4e0e\u4e00\u4e2a\u53ea\u5269\u51e0 GB \u7684\u5c0f\u78c1\u76d8\u5b8c\u5168\u4e0d\u662f\u4e00\u4e2a\u98ce\u9669\u7b49\u7ea7\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u5bb9\u91cf\u76d1\u63a7\u5e94\u8be5\u540c\u65f6\u8003\u8651\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>\u767e\u5206\u6bd4\n+\n\u7edd\u5bf9\u5269\u4f59\u5bb9\u91cf\n+\n\u589e\u957f\u901f\u5ea6\n<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u800c\u4e0d\u662f\u53ea\u770b\u4e00\u4e2a\u767e\u5206\u6570\u3002<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\" \/>\n\n\n\n<h2 class=\"wp-block-heading\">\u5341\u56db\u3001\u6700\u7ec8\u5ba1\u8ba1\u7ed3\u679c<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">\u7ecf\u8fc7\u670d\u52a1\u5668\u4fa7\u53ea\u8bfb\u5ba1\u8ba1\u548c\u771f\u5b9e\u5916\u90e8\u90ae\u4ef6\u9a8c\u8bc1\uff0c\u6700\u7ec8\u72b6\u6001\u53ef\u4ee5\u5f52\u7eb3\u4e3a\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>Mailcow services       HEALTHY\nInbound SMTP           HEALTHY\nIMAP                   HEALTHY\nRspamd                 HEALTHY\nClamAV                 HEALTHY\nSMTP Relay             VERIFIED\nSMTP AUTH              VERIFIED\nTLS                    VERIFIED\nRelay failure behavior VERIFIED\nMX fallback            NONE\nSPF                    PASS\nDKIM                   PASS\nDMARC                  PASS\nDMARC alignment        PASS\nGmail delivery         INBOX\nOpen relay             NOT OBSERVED\nAUTH brute force       NOT OBSERVED\nPerformance bottleneck NOT OBSERVED\n<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u4ecd\u7136\u5b58\u5728\u7684\u4e00\u4e9b\u4e8b\u9879\uff0c\u4f8b\u5982\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>trusted proxy \u8303\u56f4\u8fd8\u80fd\u8fdb\u4e00\u6b65\u7f29\u5c0f\uff1b<\/li>\n\n\n\n<li>\u53ef\u4ee5\u5b9a\u671f\u89c2\u5bdf\u5bb9\u91cf\uff1b<\/li>\n\n\n\n<li>\u53ef\u4ee5\u4fdd\u7559\u6062\u590d\u6f14\u7ec3\uff1b<\/li>\n\n\n\n<li>\u53ef\u4ee5\u8bb0\u5f55 SMTP Relay \u7684\u8d26\u6237\u7ea7 DNS \u914d\u7f6e\uff1b<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">\u90fd\u5c5e\u4e8e\u4fe1\u606f\u9879\u6216\u8fd0\u7ef4\u5b8c\u5584\uff0c\u800c\u4e0d\u662f\u5f53\u524d\u6545\u969c\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u56e0\u6b64\u6700\u7ec8\u53ef\u4ee5\u5f52\u7c7b\u4e3a\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>CURRENT STATUS:\nHEALTHY WITH INFORMATIONAL ITEMS\n<\/code><\/pre>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\" \/>\n\n\n\n<h2 class=\"wp-block-heading\">\u5341\u4e94\u3001\u81ea\u5efa\u90ae\u4ef6\u670d\u52a1\u5668\u771f\u6b63\u7684\u201c\u5b8c\u6210\u201d\u662f\u4ec0\u4e48\uff1f<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">\u81ea\u5efa\u90ae\u4ef6\u670d\u52a1\u5668\u662f\u5426\u5b8c\u6210\uff0c\u5e76\u4e0d\u80fd\u53ea\u770b\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>docker compose up -d\n<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u4e5f\u4e0d\u80fd\u53ea\u770b\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>\u80fd\u767b\u5f55 Webmail\n<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u751a\u81f3\u4e0d\u80fd\u53ea\u770b\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>\u80fd\u6536\u5230\u90ae\u4ef6\n<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u771f\u6b63\u8fdb\u5165\u7a33\u5b9a\u53ef\u7528\u72b6\u6001\uff0c\u81f3\u5c11\u5e94\u8be5\u80fd\u591f\u56de\u7b54\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>\u5916\u53d1\u8def\u5f84\u662f\u4ec0\u4e48\uff1f\n\u5931\u8d25\u4ee5\u540e\u90ae\u4ef6\u53bb\u54ea\uff1f\nSPF \u662f\u5426\u771f\u6b63 PASS\uff1f\nDKIM \u662f\u5426\u771f\u6b63 PASS\uff1f\nDMARC \u662f\u5426\u771f\u6b63 PASS\uff1f\n\u516c\u7f51\u626b\u63cf\u6709\u6ca1\u6709\u7a81\u7834\u8ba4\u8bc1\uff1f\n\u90ae\u4ef6\u961f\u5217\u662f\u5426\u5065\u5eb7\uff1f\n\u771f\u5b9e\u5ba2\u6237\u7aef IP \u662f\u5426\u4fdd\u7559\uff1f\nTLS \u662f\u5426\u80fd\u591f\u6301\u7eed\u81ea\u52a8\u7eed\u671f\uff1f\n\u6700\u7ec8\u90ae\u4ef6\u80fd\u5426\u8fdb\u5165\u4e3b\u6d41\u670d\u52a1\u5546 Inbox\uff1f\n<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u5f53\u8fd9\u4e9b\u95ee\u9898\u90fd\u6709\u771f\u5b9e\u65e5\u5fd7\u3001DNS\u3001\u914d\u7f6e\u548c\u6536\u4ef6\u670d\u52a1\u5668\u90ae\u4ef6\u5934\u4f5c\u4e3a\u8bc1\u636e\u4ee5\u540e\uff0c\u90ae\u4ef6\u670d\u52a1\u5668\u624d\u4ece\uff1a<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>\u201c\u53ef\u4ee5\u8fd0\u884c\u7684\u5b9e\u9a8c\u73af\u5883\u201d<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u771f\u6b63\u8fdb\u5165\uff1a<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>\u201c\u80fd\u591f\u957f\u671f\u4f7f\u7528\u7684\u4e92\u8054\u7f51\u90ae\u4ef6\u7cfb\u7edf\u201d\u3002<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u800c\u5728\u5bb6\u5ead\u7f51\u7edc\u73af\u5883\u91cc\uff0c\u201c\u5b8c\u5168\u81ea\u5df1\u627f\u62c5\u6240\u6709\u73af\u8282\u201d\u5e76\u4e0d\u662f\u552f\u4e00\u6b63\u786e\u7b54\u6848\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u628a\u90ae\u7bb1\u8d26\u6237\u3001\u6570\u636e\u3001\u57df\u540d\u3001\u6536\u4fe1\u3001\u8fc7\u6ee4\u548c\u7ba1\u7406\u6743\u638c\u63e1\u5728\u81ea\u5df1\u624b\u4e2d\uff0c\u540c\u65f6\u8ba9\u4e13\u4e1a SMTP Relay \u627f\u62c5\u6700\u56f0\u96be\u7684\u516c\u7f51\u53d1\u4fe1\u51fa\u53e3\uff0c\u662f\u4e00\u79cd\u76f8\u5f53\u52a1\u5b9e\u7684\u67b6\u6784\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u771f\u6b63\u91cd\u8981\u7684\u4e0d\u662f\u6bcf\u4e00\u4e2a\u6570\u636e\u5305\u90fd\u5fc5\u987b\u7531\u81ea\u5df1\u7684\u516c\u7f51 IP \u53d1\u51fa\uff0c\u800c\u662f\uff1a<\/p>\n\n\n\n<p 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