{"id":36177,"date":"2026-09-18T17:31:45","date_gmt":"2026-09-18T09:31:45","guid":{"rendered":"https:\/\/www.varidata.com\/uncategorized-zh-cn\/check-ptr-records-before-hong-kong-mail-server-migration\/"},"modified":"2026-09-18T17:37:58","modified_gmt":"2026-09-18T09:37:58","slug":"check-ptr-records-before-hong-kong-mail-server-migration","status":"publish","type":"post","link":"https:\/\/www.varidata.com\/zh-cn\/blog\/check-ptr-records-before-hong-kong-mail-server-migration\/","title":{"rendered":"\u9999\u6e2f\u90ae\u4ef6\u670d\u52a1\u5668\u8fc1\u79fb\u524d\u7684 PTR \u8bb0\u5f55\u68c0\u67e5"},"content":{"rendered":"<p>\n    \u5728\u4f60\u628a\u751f\u4ea7\u73af\u5883\u90ae\u4ef6\u7cfb\u7edf\u5207\u6362\u5230\u65b0\u7684\u9999\u6e2f\u8282\u70b9\u4e4b\u524d\uff0c\u5e94\u8be5\u628a\u53cd\u5411 DNS \u5f53\u4f5c\u8fc1\u79fb\u68c0\u67e5\u6e05\u5355\u91cc\u7684\u786c\u6027\u5173\u5361\uff1b\u5982\u679c <a target=\"_blank\" href=\"https:\/\/www.varidata.com\/zh-cn\/server\/hk\/cn2\/\">\u9999\u6e2f\u670d\u52a1\u5668<\/a> \u7684 PTR \u8bb0\u5f55\u914d\u7f6e\u9519\u8bef\u6216\u5e72\u8106\u7f3a\u5931\uff0c\u4f60\u51e0\u4e4e\u662f\u5728\u7ed9\u7070\u540d\u5355\u3001\u5783\u573e\u7bb1\u6295\u9012\u548c\u9690\u6027\u6536\u5165\u6d41\u5931\u63d0\u4f9b\u201c\u6807\u51c6\u6559\u7a0b\u201d\u5f0f\u7684\u573a\u666f\u3002\n  <\/p>\n<h2><strong>\u5728\u201c\u9ad8\u7ea7\u8fc7\u6ee4\u5668\u201d\u65f6\u4ee3\uff0c\u4e3a\u4ec0\u4e48\u53cd\u5411 DNS \u4f9d\u7136\u5173\u952e<\/strong><\/h2>\n<p>\n    \u73b0\u4ee3\u53cd\u5783\u573e\u5f15\u64ce\u4f1a\u8fd0\u884c\u8d1d\u53f6\u65af\u6a21\u578b\u3001\u6d88\u606f\u6307\u7eb9\u3001URL \u4fe1\u8a89\uff0c\u751a\u81f3\u5185\u5bb9\u7ea7\u7684\u673a\u5668\u5b66\u4e60\uff0c\u4f46\u771f\u6b63\u5f00\u59cb\u51b3\u7b56\u524d\uff0c\u5f80\u5f80\u4ecd\u7136\u4f1a\u5148\u505a\u51e0\u6b65\u975e\u5e38\u539f\u59cb\u7684\u5e03\u5c14\u5224\u65ad\uff1a\u8fd9\u4e2a IP \u662f\u5426\u6709\u53cd\u5411 DNS\uff1f\u8fd9\u4e2a\u540d\u5b57\u770b\u8d77\u6765\u662f\u5426\u50cf\u4e00\u4e2a\u6b63\u5e38\u7684\u90ae\u4ef6\u4e3b\u673a\uff1f\u5982\u679c\u4f60\u628a\u90ae\u4ef6\u7cfb\u7edf\u8fc1\u79fb\u5230\u4e00\u4e2a\u5168\u65b0\u7684\u9999\u6e2f IP \u6bb5\uff0c\u5374\u8df3\u8fc7\u4e86 PTR \u6821\u9a8c\uff0c\u90a3\u4e48\u5728\u5185\u5bb9\u8fc7\u6ee4\u5668\u8fd8\u6ca1\u5f00\u59cb\u5de5\u4f5c\u4e4b\u524d\uff0c\u8fd9\u4e9b\u65e9\u671f\u68c0\u67e5\u5c31\u5df2\u7ecf\u5927\u91cf\u5931\u8d25\u4e86\u3002\n  <\/p>\n<ul>\n<li>PTR \u662f\u8bc1\u660e\u201c\u8fd9\u4e2a IP \u4e0d\u662f\u968f\u673a\u5bb6\u5ead\u5bbd\u5e26\u7ec8\u7aef\u201d\u7684\u7b2c\u4e00\u9053\u63e1\u624b\u4fe1\u53f7\u3002<\/li>\n<li>\u9999\u6e2f\u5730\u5740\u6bb5\u627f\u8f7d\u4e86\u5927\u91cf\u8de8\u5883\u6d41\u91cf\uff0c\u56e0\u6b64\u4f1a\u88ab\u66f4\u6fc0\u8fdb\u5730\u5ba1\u67e5\u3002<\/li>\n<li>\u914d\u7f6e\u9519\u8bef\u7684\u53cd\u5411 DNS \u5e38\u5e38\u4f1a\u5728\u786c\u9000\u4fe1\u65e5\u5fd7\u4e2d\u4ee5\u201creverse DNS lookup failed\u201d\u4e4b\u7c7b\u7684\u63cf\u8ff0\u51fa\u73b0\u3002<\/li>\n<\/ul>\n<p>\n    \u6b63\u56e0\u4e3a\u5982\u6b64\uff0cPTR \u6821\u9a8c\u7edd\u4e0d\u662f\u88c5\u70b9\u95e8\u9762\u7684 DNS \u5c0f\u8c03\u6574\uff0c\u800c\u662f\u4efb\u4f55\u76f4\u63a5\u5bf9\u516c\u7f51\u8bf4 SMTP \u7684\u90ae\u4ef6\u8282\u70b9\u90fd\u9700\u8981\u6ee1\u8db3\u7684\u7ed3\u6784\u6027\u7ea6\u675f\u3002\n  <\/p>\n<h2><strong>\u5feb\u901f\u5165\u95e8\uff1aPTR \u4e0e A \u7684\u5dee\u5f02\uff0c\u4ee5\u53ca MTA \u4e3a\u4f55\u5728\u4e4e\u5b83<\/strong><\/h2>\n<p>\n    \u5728 DNS \u8fd9\u4e00\u5c42\uff0c\u4f60\u53ef\u4ee5\u628a A \u8bb0\u5f55\u548c PTR \u770b\u4f5c\u955c\u50cf\u64cd\u4f5c\u3002A \u8bb0\u5f55\u58f0\u660e\u67d0\u4e2a\u4e3b\u673a\u540d\u6620\u5c04\u5230\u4e00\u4e2a IP \u5730\u5740\u3002PTR \u8bb0\u5f55\u5219\u6258\u7ba1\u5728 in-addr.arpa \u6216 ip6.arpa \u533a\u57df\uff0c\u544a\u8bc9\u5168\u4e16\u754c\u201c\u8fd9\u4e2a IP \u53cd\u5411\u6620\u5c04\u5230\u4e86\u54ea\u4e2a\u4e3b\u673a\u540d\u201d\u3002\u8fd9\u79cd\u7b80\u5355\u7684\u5bf9\u79f0\u5173\u7cfb\u8ba9\u63a5\u6536\u7aef MTA \u53ef\u4ee5\u4ea4\u53c9\u6821\u9a8c\u8eab\u4efd\uff1a\u5b83\u770b\u5230 TCP \u5bf9\u7aef IP\uff0c\u505a\u4e00\u6b21\u53cd\u5411\u67e5\u8be2\uff0c\u518d\u5bf9\u7ed3\u679c\u4e3b\u673a\u540d\u505a\u4e00\u6b21\u6b63\u5411\u67e5\u8be2\u3002\n  <\/p>\n<p>\n    \u4e00\u4e2a\u201c\u5065\u5eb7\u201d\u7684\u90ae\u4ef6\u8282\u70b9\u914d\u7f6e\uff0c\u5927\u81f4\u5e94\u8be5\u957f\u8fd9\u6837\uff1a\n  <\/p>\n<ul>\n<li><code>mail1.example.com<\/code> \u62e5\u6709\u6307\u5411\u4f60\u9999\u6e2f IP \u7684 A \u6216 AAAA \u8bb0\u5f55\u3002<\/li>\n<li>\u540c\u4e00\u4e2a IP \u7684 PTR \u8bb0\u5f55\u6307\u56de <code>mail1.example.com<\/code>\u3002<\/li>\n<li>\u4f60\u7684 MTA \u5728 HELO \u6216 EHLO \u65f6\u901a\u544a\u7684\u4e3b\u673a\u540d\u4e0e\u6b64\u5b8c\u5168\u4e00\u81f4\u3002<\/li>\n<\/ul>\n<p>\n    \u5f53\u8fd9\u4e09\u9879\u540c\u65f6\u5bf9\u9f50\u65f6\uff0c\u591a\u4e2a\u4fe1\u8a89\u7cfb\u7edf\u7ed9\u51fa\u7684\u4fe1\u4efb\u5206\u90fd\u4f1a\u66f4\u597d\uff0c\u5c24\u5176\u662f\u5bf9\u90a3\u4e9b\u521a\u521a\u4ece\u5176\u4ed6\u7528\u9014\u4e2d\u56de\u6536\u3001\u7f3a\u4e4f\u5386\u53f2\u9065\u6d4b\u6570\u636e\u7684\u65b0\u5730\u5740\u6765\u8bf4\u5c24\u4e3a\u91cd\u8981\u3002\n  <\/p>\n<h2><strong>\u4e3a\u4ec0\u4e48\u9999\u6e2f\u90ae\u4ef6\u8282\u70b9\u5bf9 PTR \u8d28\u91cf\u66f4\u52a0\u654f\u611f<\/strong><\/h2>\n<p>\n    \u5982\u679c\u4f60\u5728\u6ee5\u7528\u961f\u5217\u91cc\u5f85\u8fc7\u4e00\u6bb5\u65f6\u95f4\uff0c\u5927\u6982\u7387\u4f1a\u6ce8\u610f\u5230\uff1a\u90e8\u5206\u9999\u6e2f\u7f51\u6bb5\u627f\u8f7d\u7684\u4e1a\u52a1\u8d1f\u8f7d\u5341\u5206\u6df7\u6742\u2014\u2014\u65e2\u6709\u6b63\u89c4\u4f01\u4e1a\u90ae\u4ef6\u3001\u6fc0\u8fdb\u8425\u9500\u5e73\u53f0\uff0c\u53c8\u6709\u52a0\u5bc6\u8d27\u5e01\u7ad9\u70b9\u3001\u6e38\u620f\u6d41\u91cf\uff0c\u751a\u81f3\u5076\u5c14\u5939\u6742\u7740\u50f5\u5c38\u7f51\u7edc\u6b8b\u7559\u3002\u8fd9\u79cd\u6df7\u5408\u8d1f\u8f7d\u4f1a\u8ba9\u5927\u5382\u5728\u4fe1\u4efb\u65b0 IP \u65f6\u53d8\u5f97\u683c\u5916\u4fdd\u5b88\u3002\n  <\/p>\n<ol>\n<li>\n      <strong>\u4fe1\u8a89\u57fa\u7ebf\u4e0d\u7a33\u5b9a\u3002<\/strong> \u53bb\u5e74\u8fd8\u5e72\u51c0\u7684\u5730\u5740\u6bb5\uff0c\u53ef\u80fd\u4eca\u5e74\u5df2\u7ecf\u90e8\u5206\u9ed1\u540d\u5355\u5316\uff0c\u65b0 IP \u8d77\u6b65\u7684\u56fa\u6709\u4fe1\u4efb\u5ea6\u4f1a\u660e\u663e\u504f\u4f4e\u3002\n    <\/li>\n<li>\n      <strong>\u8de8\u533a\u57df\u8def\u7531\u566a\u58f0\u5927\u3002<\/strong> \u5f53\u90ae\u4ef6\u8de8\u8d8a\u591a\u4e2a\u81ea\u6cbb\u7cfb\u7edf\u548c\u533a\u57df\u65f6\uff0c\u4efb\u4f55\u201c\u65e0\u53cd\u5411 DNS\u201d\u4e4b\u7c7b\u7684\u5f31\u4fe1\u53f7\uff0c\u90fd\u8db3\u4ee5\u89e6\u53d1\u8282\u6d41\u6216\u9650\u901f\u3002\n    <\/li>\n<li>\n      <strong>\u5171\u4eab\u57fa\u7840\u8bbe\u65bd\u5e38\u89c1\u3002<\/strong> \u5f88\u591a\u56e2\u961f\u4e3a\u4e86\u5728\u4e9a\u6d32\u83b7\u5f97\u66f4\u597d\u7684\u65f6\u5ef6\uff0c\u4f1a\u8fc1\u5165\u9999\u6e2f\u673a\u623f\uff0c\u9009\u62e9\u9ad8\u5bc6\u5ea6\u865a\u62df\u5316\u6216\u5171\u4eab\u578b\u670d\u52a1\u5668\u79df\u7528\u73af\u5883\uff0c\u800c\u4e0d\u662f\u5355\u79df\u6237\u7684\u88f8\u91d1\u5c5e\uff0c\u8fd9\u4f1a\u653e\u5927\u201c\u5435\u95f9\u90bb\u5c45\u201d\u7684\u5916\u6ea2\u6548\u5e94\u3002\n    <\/li>\n<\/ol>\n<p>\n    \u5728\u8fd9\u79cd\u80cc\u666f\u4e0b\uff0c\u201c\u5e72\u51c0\u7684 PTR \u8bb0\u5f55\u201d\u5c5e\u4e8e\u4f60\u6700\u5bb9\u6613\u638c\u63a7\u7684\u4f4e\u6210\u672c\u4fe1\u53f7\u4e4b\u4e00\uff0c\u80fd\u6301\u7eed\u5730\u628a\u98ce\u9669\u8bc4\u5206\u5f80\u4e0b\u538b\uff0c\u4f7f\u8fdc\u7aef\u8fc7\u6ee4\u5668\u51b3\u5b9a\u662f\u6392\u961f\u3001\u6162\u8d70\u8fd8\u662f\u76f4\u63a5\u4e22\u5f03\u4f60\u7684\u6d41\u91cf\u65f6\uff0c\u66f4\u503e\u5411\u4e8e\u6e29\u548c\u7684\u9009\u9879\u3002\n  <\/p>\n<h2><strong>\u8bc6\u522b\u54ea\u4e9b IP \u771f\u7684\u9700\u8981\u505a PTR \u68c0\u67e5<\/strong><\/h2>\n<p>\n    \u5728\u6d4b\u8bd5\u4e4b\u524d\uff0c\u4f60\u9700\u8981\u4e00\u4efd\u6e05\u5355\uff0c\u5217\u51fa\u8fc1\u79fb\u540e\u53ef\u80fd\u53d1\u51fa\u90ae\u4ef6\u7684\u6240\u6709 IP \u5730\u5740\u3002\u542c\u8d77\u6765\u5f88\u7b80\u5355\uff0c\u4f46\u5728\u5206\u5e03\u5f0f\u90e8\u7f72\u4e2d\uff0c\u5f88\u5bb9\u6613\u6f0f\u6389\u67d0\u4e2a\u8282\u70b9\uff0c\u7ed3\u679c\u65e5\u540e\u624d\u53d1\u73b0\u67d0\u6761\u8def\u5f84\u4ecd\u7136\u8d70\u7684\u662f\u4e00\u4e2a\u53cd\u5411 DNS \u5df2\u7ecf\u574f\u6389\u7684\u65e7\u7aef\u70b9\u3002\n  <\/p>\n<ol>\n<li>\n      \u5217\u51fa\u6240\u6709\u51fa\u7ad9 SMTP \u4e2d\u7ee7\u7684\u516c\u7f51 IP\u3002\u5305\u62ec\u901a\u8fc7 NAT \u7f51\u5173\u8f6c\u53d1\u7684\u5185\u90e8\u4e2d\u7ee7\uff1b\u771f\u6b63\u91cd\u8981\u7684\u662f\u6700\u7ec8\u5bf9\u5916\u66b4\u9732\u7684\u51fa\u53e3 IP\u3002\n    <\/li>\n<li>\n      \u628a\u90a3\u4e9b\u76f4\u63a5\u8fde\u516c\u7f51\u53d1\u4fe1\u3001\u672a\u8d70\u4e2d\u5fc3\u4e2d\u7ee7\u96c6\u7fa4\u7684\u5e94\u7528\u670d\u52a1\u5668\u4e5f\u5305\u542b\u8fdb\u6765\u3002\n    <\/li>\n<li>\n      \u6ce8\u610f\u8d1f\u8f7d\u5747\u8861\u5668\u3001\u9632\u706b\u5899\u548c\u90ae\u4ef6\u7f51\u5173\uff0c\u53ea\u8981\u5b83\u4eec\u53ef\u80fd\u53d1\u8d77\u6216\u6539\u5199\u8fde\u63a5\uff0c\u5e76\u5728\u5bf9\u7aef\u770b\u6765\u6210\u4e3a\u201c\u6e90 IP\u201d\uff0c\u5c31\u5fc5\u987b\u7eb3\u5165\u68c0\u67e5\u6e05\u5355\u3002\n    <\/li>\n<\/ol>\n<p>\n    \u4e00\u4e2a\u5b9e\u7528\u4f46\u8db3\u591f\u7b80\u5355\u7684\u65b9\u6cd5\uff0c\u662f\u5728\u6bcf\u53f0\u4e0e\u90ae\u4ef6\u76f8\u5173\u7684\u8282\u70b9\u4e0a\u90e8\u7f72\u4e00\u4e2a\u5c0f\u811a\u672c\uff0c\u8bb0\u5f55\u5b83\u5728\u53d1\u8d77\u51fa\u7ad9 TCP \u8fde\u63a5\u65f6\u770b\u5230\u7684\u516c\u7f51\u51fa\u53e3\u5730\u5740\uff0c\u7136\u540e\u628a\u6240\u6709\u65e5\u5fd7\u6c47\u603b\u6210\u4e00\u5f20\u5217\u8868\u3002\u8fd9\u4efd\u5217\u8868\u5c31\u53ef\u4ee5\u5f53\u4f5c\u4f60\u68c0\u67e5\u548c\u6700\u7ec8\u6821\u9a8c\u7684\u201c\u6743\u5a01 IP \u96c6\u5408\u201d\u3002\n  <\/p>\n<h2><strong>\u7528\u547d\u4ee4\u884c\u68c0\u67e5 PTR \u8bb0\u5f55\u7684\u51e0\u79cd\u65b9\u5f0f<\/strong><\/h2>\n<p>\n    \u591a\u6570\u7ef4\u62a4\u9999\u6e2f\u57fa\u7840\u8bbe\u65bd\u7684\u5de5\u7a0b\u5e08\u624b\u91cc\uff0c\u90fd\u6709\u4e00\u5957\u7c7b Unix \u5de5\u5177\u7bb1\u3002\u9a8c\u8bc1\u53cd\u5411 DNS \u7684\u6700\u5feb\u65b9\u5f0f\uff0c\u5c31\u662f\u4f7f\u7528\u8fd9\u4e9b\u76f4\u63a5\u4e0e\u672c\u5730\u89e3\u6790\u5668\u6216\u6307\u5b9a\u9012\u5f52 DNS \u4ea4\u4e92\u7684\u6807\u51c6\u67e5\u8be2\u5de5\u5177\u3002\n  <\/p>\n<h3>\u4f7f\u7528 <code>nslookup<\/code><\/h3>\n<p>\n    \u5728\u51e0\u4e4e\u4efb\u4f55\u6709 Shell \u7684\u5e73\u53f0\u4e0a\uff0c\u4f60\u90fd\u53ef\u4ee5\u5148\u8fd0\u884c\u7c7b\u4f3c\u5982\u4e0b\u7684\u547d\u4ee4\uff1a\n  <\/p>\n<pre><code>nslookup 203.0.113.45\r\nnslookup -type=PTR 203.0.113.45<\/code><\/pre>\n<p>\n    \u4f60\u8981\u627e\u7684\u662f\u7c7b\u4f3c\u201cname = \u2026\u201d\u7684\u90a3\u4e00\u884c\u3002\u8fd9\u4e2a\u5b57\u6bb5\u5c31\u662f\u8be5 IP \u5411\u4e92\u8054\u7f51\u5c55\u793a\u7684\u5019\u9009\u4e3b\u673a\u540d\u3002\u5982\u679c\u4f60\u770b\u5230\u7684\u6a21\u5f0f\u7c7b\u4f3c <code>203-0-113-45.static.provider.net<\/code>\uff0c\u90a3\u4e48\u5927\u6982\u7387\u7528\u7684\u8fd8\u662f\u670d\u52a1\u5546\u7684\u9ed8\u8ba4\u53cd\u5411 DNS\uff0c\u800c\u4e0d\u662f\u4f60\u671f\u671b\u7684\u89c4\u8303\u90ae\u4ef6\u4e3b\u673a\u540d\u3002\n  <\/p>\n<h3>\u4f7f\u7528 <code>dig -x<\/code> \u83b7\u53d6\u66f4\u8be6\u7ec6\u7684\u4fe1\u606f<\/h3>\n<p>\n    \u5f53\u4f60\u5e0c\u671b\u5f97\u5230\u7d27\u51d1\u3001\u4fbf\u4e8e\u7a0b\u5e8f\u89e3\u6790\u7684\u8f93\u51fa\u65f6\uff0c<code>dig<\/code> \u5f80\u5f80\u66f4\u5408\u9002\uff1a\n  <\/p>\n<pre><code>dig -x 203.0.113.45 +short\r\ndig -x 203.0.113.45<\/code><\/pre>\n<p>\n    \u52a0\u4e0a <code>+short<\/code> \u7684\u7248\u672c\u53ea\u4f1a\u6253\u5370\u89e3\u6790\u51fa\u6765\u7684\u4e3b\u673a\u540d\uff08\u5982\u679c\u5b58\u5728\u7684\u8bdd\uff09\u3002\u5b8c\u6574\u7248\u5219\u5141\u8bb8\u4f60\u68c0\u67e5 TTL\u3001\u6388\u6743\u533a\u57df\u4ee5\u53ca\u8fd9\u662f\u5426\u662f\u7f13\u5b58\u547d\u4e2d\u3002\u5982\u679c\u67e5\u8be2\u7ed3\u679c\u4e3a\u7a7a\uff0c\u5bf9\u8fdc\u7aef\u5783\u573e\u90ae\u4ef6\u8fc7\u6ee4\u5668\u6765\u8bf4\uff0c\u4f60\u7684 PTR \u7b49\u4ef7\u4e8e\u4e0d\u5b58\u5728\u3002\n  <\/p>\n<h3>\u6d4b\u8bd5 IPv6 \u7684\u53cd\u5411\u89e3\u6790<\/h3>\n<p>\n    \u5982\u679c\u4f60\u591f\u5927\u80c6\uff0c\u628a\u751f\u4ea7\u90ae\u4ef6\u8dd1\u5728 IPv6 \u4e0a\uff0c\u540c\u6837\u53ef\u4ee5\u4f7f\u7528\u4e0a\u8ff0\u6280\u672f\uff1b\u5dee\u5f02\u4ec5\u5728\u4e8e\u66f4\u590d\u6742\u7684\u53cd\u5411\u533a\u57df\u547d\u540d\u65b9\u5f0f\u3002\u5bf9\u4e8e\u67d0\u4e2a IPv6 \u5730\u5740\uff0c<code>dig -x<\/code> \u4f1a\u5728\u5185\u90e8\u628a\u5404\u4e2a nibble \u91cd\u5199\u8fdb ip6.arpa \u57df\u3002\u4ece\u4f60\u7684\u89c6\u89d2\u770b\uff0c\u4ecd\u7136\u53ea\u662f\u6267\u884c\u4e00\u6761\u547d\u4ee4\uff0c\u7136\u540e\u67e5\u770b\u8fd4\u56de\u7684\u4e3b\u673a\u540d\u3002\n  <\/p>\n<h2><strong>\u901a\u8fc7\u6d4f\u89c8\u5668\u5de5\u5177\u505a\u5feb\u901f\u53ef\u89c6\u5316\u68c0\u67e5<\/strong><\/h2>\n<p>\n    \u4f60\u7684\u56e2\u961f\u91cc\u5e76\u4e0d\u662f\u6bcf\u4e2a\u4eba\u90fd\u6574\u5929\u6ce1\u5728\u7ec8\u7aef\u91cc\u3002\u5728\u628a\u8fc1\u79fb Runbook \u4ea4\u7ed9\u76f8\u5173\u65b9\u65f6\uff0c\u9644\u4e0a\u4e00\u4e9b\u6d4f\u89c8\u5668\u5f0f\u7684\u53cd\u5411 DNS \u8bca\u65ad\u5de5\u5177\u5f80\u5f80\u4f1a\u66f4\u53cb\u597d\u3002\u5f88\u591a\u516c\u5171\u7ad9\u70b9\u652f\u6301\u8f93\u5165\u4e00\u4e2a IP\uff0c\u7136\u540e\u4ee5\u5361\u7247\u5f62\u5f0f\u5c55\u793a PTR\u3001ASN\u3001\u5730\u7406\u4f4d\u7f6e\u4ee5\u53ca\u5176\u5b83\u76f8\u5173\u4fe1\u606f\u3002\n  <\/p>\n<ul>\n<li>\u628a\u8ba1\u5212\u4f5c\u4e3a\u51fa\u7ad9\u7684\u6bcf\u4e2a IP \u81f3\u5c11\u5728\u4e24\u4e2a\u72ec\u7acb\u5de5\u5177\u4e2d\u68c0\u67e5\u4e00\u6b21\uff0c\u4ee5\u907f\u514d\u88ab\u67d0\u4e2a\u89e3\u6790\u5668\u7f13\u5b58\u8bef\u5bfc\u3002<\/li>\n<li>\u4ea4\u53c9\u68c0\u67e5\u8be5\u4e3b\u673a\u540d\u662f\u5426\u6e05\u6670\u5730\u4e0e\u54c1\u724c\u57df\u540d\u76f8\u5173\uff0c\u800c\u4e0d\u662f\u670d\u52a1\u5546\u6cdb\u7528\u5730\u5740\u6c60\u4e2d\u7684\u9ed8\u8ba4\u547d\u540d\u3002<\/li>\n<li>\u628a\u68c0\u67e5\u7ed3\u679c\u622a\u56fe\uff0c\u4f5c\u4e3a\u8fc1\u79fb\u53d8\u66f4\u8bb0\u5f55\u6216\u5408\u89c4\u5ba1\u8ba1\u7684\u8bc1\u636e\u6750\u6599\u3002<\/li>\n<\/ul>\n<p>\n    \u5f53\u4f60\u9700\u8981\u975e\u8fd0\u7ef4\u540c\u4e8b\u5e2e\u5fd9\u786e\u8ba4\u201c\u90ae\u4ef6\u4e3b\u673a\u540d\u770b\u8d77\u6765\u662f\u5426\u662f\u516c\u53f8\u54c1\u724c\u800c\u4e0d\u662f\u968f\u673a\u5b57\u7b26\u4e32\u201d\u65f6\uff0c\u8fd9\u4e9b\u5de5\u5177\u5c24\u5176\u6709\u7528\uff0c\u5373\u4fbf\u4ed6\u4eec\u5bf9 DNS \u5185\u90e8\u5b9e\u73b0\u4e00\u65e0\u6240\u77e5\u3002\n  <\/p>\n<h2><strong>\u50cf\u5783\u573e\u8fc7\u6ee4\u5668\u90a3\u6837\u9605\u8bfb PTR \u7ed3\u679c<\/strong><\/h2>\n<p>\n    \u62ff\u5230 PTR \u503c\u4e4b\u540e\uff0c\u66f4\u5fae\u5999\u7684\u5de5\u4f5c\u662f\u5224\u65ad\uff1a\u5b83\u53ea\u662f\u201c\u5b58\u5728\u201d\uff0c\u8fd8\u662f\u201c\u8d28\u91cf\u8db3\u591f\u9ad8\u201d\u3002\u53cd\u5783\u573e\u7cfb\u7edf\u4e0d\u4f1a\u63e3\u6d4b\u4f60\u7684\u826f\u597d\u610f\u613f\uff1b\u5b83\u4eec\u53ea\u4f1a\u5728\u9ad8\u901f\u6d41\u6c34\u7ebf\u4e0a\u6267\u884c\u4e00\u5957\u7b80\u5355\u7684\u542f\u53d1\u5f0f\u89c4\u5219\u3002\u5c1d\u8bd5\u7ad9\u5230\u5b83\u4eec\u7684\u89c6\u89d2\u601d\u8003\uff0c\u4f1a\u975e\u5e38\u6709\u4ef7\u503c\u3002\n  <\/p>\n<ul>\n<li>\n      \u8fd9\u4e2a\u4e3b\u673a\u540d\u662f\u5426\u660e\u663e\u770b\u8d77\u6765\u662f\u57fa\u7840\u8bbe\u65bd\u8282\u70b9\uff0c\u4f8b\u5982 <code>mail1.brand.example<\/code>\uff0c\u800c\u4e0d\u662f\u50cf\u4e00\u53f0\u6d88\u8d39\u7ea7\u8bbe\u5907\uff1f\n    <\/li>\n<li>\n      \u5982\u679c\u4f60\u5bf9\u8fd9\u4e2a\u4e3b\u673a\u540d\u505a\u4e00\u6b21\u6b63\u5411\u67e5\u8be2\uff0c\u7ed3\u679c\u662f\u5426\u53c8\u89e3\u6790\u56de\u4f60\u6700\u521d\u7684\u90a3\u4e2a IP \u5730\u5740\uff1f\n    <\/li>\n<li>\n      \u4f60\u7684 MTA \u5728 SMTP \u95ee\u5019\u9636\u6bb5\u662f\u5426\u5b8c\u6574\u800c\u7cbe\u786e\u5730\u901a\u544a\u4e86\u8fd9\u4e2a\u540d\u5b57\uff0c\u6ca1\u6709\u989d\u5916\u522b\u540d\u6216\u6807\u7b7e\u4e0d\u5339\u914d\u7684\u95ee\u9898\uff1f\n    <\/li>\n<\/ul>\n<p>\n    \u5f53\u4f60\u628a\u53cd\u5411 DNS\u3001\u6b63\u5411 DNS \u4e0e HELO \u4e09\u8005\u5168\u90e8\u5bf9\u9f50\u540e\uff0c\u53ef\u4ee5\u5728\u6781\u77ed\u65f6\u95f4\u5185\u6d88\u9664\u5927\u91cf\u201c\u8bef\u62a5\u5f0f\u7684\u53ef\u7591\u4fe1\u53f7\u201d\uff0c\u5c24\u5176\u662f\u5bf9\u90a3\u4e9b\u521a\u521a\u5728\u9999\u6e2f\u673a\u623f\u5f00\u901a\u3001\u5c1a\u672a\u5efa\u7acb\u7a33\u5b9a\u6295\u9012\u753b\u50cf\u7684\u65b0\u5730\u5740\u6bb5\u3002\n  <\/p>\n<h2><strong>\u4e0e\u670d\u52a1\u5546\u534f\u540c\uff1a\u8c01\u771f\u6b63\u63a7\u5236\u4e86\u53cd\u5411 DNS<\/strong><\/h2>\n<p>\n    \u8fc1\u79fb\u8fc7\u7a0b\u4e2d\u4e00\u4e2a\u5e38\u89c1\u7684\u8bef\u89e3\u662f\uff1a\u8d1f\u8d23\u7f16\u8f91\u57df\u540d\u6b63\u5411\u89e3\u6790\u7684\u7ba1\u7406\u5458\uff0c\u4e5f\u53ef\u4ee5\u76f4\u63a5\u6539 PTR\u3002\u73b0\u5b9e\u662f\uff0c\u516c\u7f51 IPv4 \u548c IPv6 \u5730\u5740\u7684\u53cd\u5411 DNS \u7ba1\u7406\u6743\uff0c\u53d6\u51b3\u4e8e\u8c01\u62e5\u6709\u8fd9\u6bb5\u5730\u5740\u7a7a\u95f4\u3002\u5728\u9999\u6e2f\u6570\u636e\u4e2d\u5fc3\u73af\u5883\u91cc\uff0c\u8fd9\u901a\u5e38\u610f\u5473\u7740\u662f\u4e0a\u6e38\u8fd0\u8425\u5546\u3001\u673a\u623f\uff0c\u6216\u8005\u4e91\u5e73\u53f0\u8bf4\u4e86\u7b97\u3002\n  <\/p>\n<ol>\n<li>\n      \u5982\u679c\u4f60\u628a\u5730\u5740\u4f5c\u4e3a\u66f4\u5927\u4e00\u63fd\u5b50<strong>\u670d\u52a1\u5668\u79df\u7528<\/strong>\u5957\u9910\u7684\u4e00\u90e8\u5206\u79df\u7528\uff0c\u90a3\u4e48\u53cd\u5411\u8bb0\u5f55\u901a\u5e38\u53ea\u80fd\u901a\u8fc7\u670d\u52a1\u5546\u63a7\u5236\u53f0\u6216\u5de5\u5355\u6d41\u7a0b\u6765\u4fee\u6539\u3002\n    <\/li>\n<li>\n      \u5982\u679c\u4f60\u6301\u6709\u81ea\u5df1\u7684\u8def\u7531\u524d\u7f00\uff0c\u5e76\u5728\u533a\u57df\u4e92\u8054\u7f51\u6ce8\u518c\u673a\u6784\u5b8c\u6210\u4e86\u767b\u8bb0\uff0c\u90a3\u4e48\u56e2\u961f\u53ef\u80fd\u5c31\u662f in-addr.arpa \u533a\u57df\u7684\u6258\u7ba1\u65b9\uff0c\u53ef\u4ee5\u76f4\u63a5\u7f16\u8f91 PTR \u6761\u76ee\u3002\n    <\/li>\n<li>\n      \u5982\u679c\u90ae\u4ef6\u8282\u70b9\u90e8\u7f72\u5728\u7eaf<strong>\u670d\u52a1\u5668\u6258\u7ba1<\/strong>\u673a\u67dc\u4e2d\uff0c\u5e76\u901a\u8fc7\u591a\u5bb6\u8fd0\u8425\u5546\u63a5\u5165\uff0c\u4f60\u9700\u8981\u786e\u8ba4\u54ea\u4e2a\u4e0a\u6e38\u5728\u5bf9\u5916\u5e7f\u64ad\u54ea\u4e2a\u5730\u5740\u6bb5\uff0c\u4ee5\u53ca\u8c01\u6709\u6743\u9650\u4e3a\u5bf9\u5e94\u7684\u5730\u5740\u5757\u521b\u5efa\u53cd\u5411\u89e3\u6790\u8bb0\u5f55\u3002\n    <\/li>\n<\/ol>\n<p>\n    \u82e5\u60f3\u8ba9\u8fc1\u79fb\u8fc7\u7a0b\u8db3\u591f\u987a\u7545\uff0c\u5e94\u5f53\u5728\u65e9\u671f\u89c4\u5212\u9636\u6bb5\u5c31\u628a\u4e0a\u8ff0\u8c03\u67e5\u505a\u5b8c\uff0c\u800c\u4e0d\u662f\u5728\u5207\u6362\u5f53\u5929\u624d\u53d1\u73b0\uff1a\u6539\u4e00\u4e2a\u62fc\u5199\u9519\u8bef\u5c45\u7136\u9700\u8981\u63d0\u624b\u5de5\u5de5\u5355\uff0c\u5e76\u4e14\u7b49\u5f85 24 \u5c0f\u65f6\u7684\u670d\u52a1\u54cd\u5e94\u65f6\u95f4\u3002\n  <\/p>\n<h2><strong>\u9999\u6e2f\u90ae\u4ef6\u8fc1\u79fb\u7684 PTR \u9a8c\u8bc1\u6d41\u7a0b\uff08\u5206\u6b65\u8bf4\u660e\uff09<\/strong><\/h2>\n<p>\n    \u4e3a\u4e86\u5728\u4e0d\u540c\u73af\u5883\u4e4b\u95f4\u4fdd\u6301\u53ef\u590d\u7528\u6027\uff0c\u4f60\u53ef\u4ee5\u628a\u6574\u4e2a\u6d41\u7a0b\u62bd\u8c61\u6210\u4e00\u4e2a\u5c0f\u800c\u786e\u5b9a\u6027\u7684\u6d41\u6c34\u7ebf\u3002\u76ee\u6807\u662f\u4ece\u201c\u6211\u4eec\u89c9\u5f97 DNS \u6ca1\u95ee\u9898\u201d\u8fd9\u79cd\u6a21\u7cca\u611f\u53d7\uff0c\u8f6c\u53d8\u4e3a\u53ef\u9a8c\u8bc1\u3001\u53ef\u8bb0\u5f55\u3001\u5e76\u62e5\u6709\u660e\u786e\u901a\u8fc7\/\u5931\u8d25\u72b6\u6001\u7684\u64cd\u4f5c\u5e8f\u5217\u3002\n  <\/p>\n<ol>\n<li>\n      <strong>\u6536\u96c6\u8f93\u5165\u3002<\/strong> \u5bfc\u51fa\u6240\u6709\u6f5c\u5728\u51fa\u7ad9 IP \u7684\u5217\u8868\uff0c\u4ee5\u53ca\u6bcf\u4e2a\u90ae\u4ef6\u8282\u70b9\u5bf9\u5e94\u7684\u76ee\u6807\u89c4\u8303\u4e3b\u673a\u540d\u3002\n    <\/li>\n<li>\n      <strong>\u5feb\u7167\u5f53\u524d DNS \u72b6\u6001\u3002<\/strong> \u4e3a\u6bcf\u4e2a\u5730\u5740\u8bb0\u5f55\u5f53\u524d PTR \u53ca\u5176 TTL\uff0c\u540c\u65f6\u8bb0\u4e0b\u76ee\u6807\u4e3b\u673a\u540d\u5f53\u524d\u7684 A \u6216 AAAA \u8bb0\u5f55\u3002\n    <\/li>\n<li>\n      <strong>\u63d0\u4ea4\u4fee\u6b63\u3002<\/strong> \u5bf9\u4efb\u4f55\u7f3a\u5931\u6216\u4e0d\u5339\u914d\u7684\u6761\u76ee\uff0c\u5411\u670d\u52a1\u5546\u63d0\u4ea4\u5de5\u5355\u6216\u5728\u81ea\u6709\u53cd\u5411\u533a\u57df\u4e2d\u8fdb\u884c\u4fee\u6539\uff0c\u5e76\u4e3a\u6bcf\u4e2a IP \u8bb0\u5f55\u5bf9\u5e94\u7684\u5de5\u5355 ID\u3002\n    <\/li>\n<li>\n      <strong>\u9a8c\u8bc1\u751f\u6548\u60c5\u51b5\u3002<\/strong> \u5728\u7b49\u5f85 TTL \u65f6\u957f\u8fc7\u540e\uff0c\u4ece\u81f3\u5c11\u4e24\u4e2a\u7f51\u7edc\uff08\u6700\u597d\u5305\u62ec\u673a\u623f\u5916\u90e8\u7f51\u7edc\uff09\u91cd\u65b0\u8fd0\u884c <code>dig -x<\/code> \u67e5\u8be2\uff0c\u786e\u8ba4\u7ed3\u679c\u5df2\u7ecf\u4e0e\u8ba1\u5212\u4e00\u81f4\u3002\n    <\/li>\n<li>\n      <strong>\u8fdb\u884c\u771f\u5b9e\u53d1\u4fe1\u6d4b\u8bd5\u3002<\/strong> \u4ece\u6bcf\u4e2a\u65b0\u8282\u70b9\u5411\u4e3b\u6d41\u90ae\u7bb1\u670d\u52a1\u5546\u53d1\u9001\u6d4b\u8bd5\u90ae\u4ef6\uff0c\u68c0\u67e5\u90ae\u4ef6\u5934\u91cc\u8bb0\u5f55\u7684\u53cd\u5411\u540d\u79f0\u662f\u5426\u7b26\u5408\u9884\u671f\u3002\n    <\/li>\n<li>\n      <strong>\u8bb0\u5f55\u6700\u7ec8\u72b6\u6001\u3002<\/strong> \u5728\u53d8\u66f4\u7ba1\u7406\u7cfb\u7edf\u4e2d\u4fdd\u5b58\u201cIP \u2192 \u4e3b\u673a\u540d\u201d\u7684\u6700\u7ec8\u6620\u5c04\uff0c\u4ee5\u53ca\u9a8c\u8bc1\u65e5\u5fd7\uff0c\u4ee5\u5907\u4eca\u540e\u5ba1\u8ba1\u6216\u6545\u969c\u56de\u6eaf\u3002\n    <\/li>\n<\/ol>\n<p>\n    \u8fd9\u6837\u4e00\u4efd\u7b80\u5355\u7684\u68c0\u67e5\u5355\uff0c\u53ef\u4ee5\u663e\u8457\u51cf\u5c11\u8fd0\u7ef4\u610f\u5916\uff0c\u5e76\u4e3a\u540e\u7eed\u6240\u6709\u5728\u9999\u6e2f\u65b0\u589e\u90ae\u4ef6\u8282\u70b9\u2014\u2014\u65e0\u8bba\u662f\u6279\u91cf\u8425\u9500\u90ae\u4ef6\u3001\u4e8b\u52a1\u578b\u901a\u77e5\uff0c\u8fd8\u662f\u5076\u5c14\u76f4\u63a5\u53d1\u51fa\u62a5\u8b66\u7684\u5fae\u670d\u52a1\u2014\u2014\u63d0\u4f9b\u53ef\u91cd\u590d\u590d\u7528\u7684\u6807\u51c6\u6a21\u7248\u3002\n  <\/p>\n<h2><strong>\u6293\u53d6\u771f\u5b9e SMTP \u4f1a\u8bdd\u6765\u9a8c\u8bc1\u9884\u671f<\/strong><\/h2>\n<p>\n    \u53ea\u505a DNS \u68c0\u67e5\u8fd8\u4e0d\u591f\uff0c\u771f\u6b63\u5173\u952e\u7684\u662f\u8fdc\u7aef MTA \u5728\u8fde\u63a5\u5efa\u7acb\u65f6\u5230\u5e95\u770b\u5230\u4e86\u4ec0\u4e48\u3002\u503c\u5f97\u82b1\u70b9\u65f6\u95f4\u4ece\u65b0\u67b6\u6784\u4e2d\u6293\u53d6\u51e0\u6bb5\u5b8c\u6574\u7684 SMTP \u4f1a\u8bdd\uff0c\u628a\u5b83\u4eec\u548c\u4f60\u5728\u8bbe\u8ba1\u6587\u6863\u91cc\u753b\u8fc7\u7684\u7406\u8bba\u6a21\u578b\u8fdb\u884c\u5bf9\u6bd4\u3002\n  <\/p>\n<ul>\n<li>\n      \u4f7f\u7528 <code>openssl s_client<\/code> \u6216\u539f\u59cb TCP \u5ba2\u6237\u7aef\uff0c\u9010\u884c\u89c2\u5bdf Banner \u548c EHLO \u4ea4\u4e92\u8fc7\u7a0b\u3002\n    <\/li>\n<li>\n      \u786e\u8ba4\u95ee\u5019\u8bed\u4e2d\u7684\u4e3b\u673a\u540d\u4e0e PTR \u8bb0\u5f55\u5b8c\u5168\u543b\u5408\uff0c\u5305\u542b\u6700\u540e\u4e00\u7ea7\u6807\u7b7e\u4ee5\u53ca\u5c3e\u968f\u70b9\u7b49\u7ec6\u8282\u5904\u7406\u3002\n    <\/li>\n<li>\n      \u68c0\u67e5\u662f\u5426\u5b58\u5728\u90ae\u4ef6\u7f51\u5173\u6216\u5b89\u5168\u8bbe\u5907\uff0c\u5728\u9996\u8df3\u4e4b\u540e\u5077\u5077\u6539\u5199\u4e86\u5bf9\u5916\u901a\u544a\u7684\u4e3b\u673a\u540d\u3002\n    <\/li>\n<\/ul>\n<p>\n    \u5f53\u53d1\u73b0\u5f02\u5e38\u65f6\uff0c\u4f60\u5c31\u62e5\u6709\u8db3\u591f\u7684\u9065\u6d4b\u6570\u636e\uff0c\u53bb\u5224\u65ad\u95ee\u9898\u7a76\u7adf\u51fa\u5728 MTA \u914d\u7f6e\u3001\u4ee3\u7406\u5c42\uff0c\u8fd8\u662f DNS \u8bb0\u5f55\u672c\u8eab\uff0c\u800c\u4e0d\u662f\u7ee7\u7eed\u5bf9\u652f\u79bb\u7834\u788e\u7684\u9000\u4fe1\u4fe1\u606f\u505a\u201c\u7384\u5b66\u89e3\u8bfb\u201d\u3002\n  <\/p>\n<h2><strong>\u628a PTR \u68c0\u67e5\u7eb3\u5165\u90ae\u4ef6\u7cfb\u7edf\u7684\u6301\u7eed\u4ea4\u4ed8\u6d41\u7a0b<\/strong><\/h2>\n<p>\n    \u9891\u7e41\u53d1\u5e03\u90ae\u4ef6\u6808\u7684\u56e2\u961f\uff0c\u5f80\u5f80\u4e60\u60ef\u628a DNS \u5f53\u6210\u201c\u9759\u6001\u57fa\u7840\u8bbe\u65bd\u201d\uff0c\u800c\u5fd8\u4e86\u50cf\u6d4b\u8bd5\u5e94\u7528\u4ee3\u7801\u90a3\u6837\u53bb\u6d4b\u8bd5\u5b83\u3002\u4f60\u53ef\u4ee5\u901a\u8fc7\u5728\u90e8\u7f72\u6216\u4e0a\u7ebf\u6d41\u7a0b\u4e2d\u5d4c\u5165\u4e00\u4e2a\u8f7b\u91cf\u7ea7\u7684\u53cd\u5411 DNS \u5ba1\u8ba1\u6b65\u9aa4\uff0c\u6765\u907f\u514d\u8fd9\u79cd\u76f2\u70b9\u3002\n  <\/p>\n<ol>\n<li>\n      \u5728\u6d41\u6c34\u7ebf\u4e2d\u589e\u52a0\u4e00\u4e2a\u4efb\u52a1\uff0c\u5bf9\u5f53\u524d\u7528\u4e8e\u9884\u53d1\u5e03\u548c\u751f\u4ea7\u73af\u5883\u51fa\u7ad9\u6d41\u91cf\u7684\u6240\u6709\u51fa\u53e3\u5730\u5740\uff0c\u67e5\u8be2 PTR \u548c\u6b63\u5411\u89e3\u6790\u8bb0\u5f55\u3002\n    <\/li>\n<li>\n      \u5982\u679c\u4efb\u4e00\u67e5\u8be2\u4e3a\u7a7a\u3001\u4e0d\u5339\u914d\uff0c\u6216\u8005\u89e3\u6790\u51fa\u7684\u4e3b\u673a\u540d\u4e0d\u5728\u5141\u8bb8\u7684\u6a21\u5f0f\u767d\u540d\u5355\u4e2d\uff0c\u5219\u8ba9\u6d41\u6c34\u7ebf\u5931\u8d25\u3002\n    <\/li>\n<li>\n      \u8f93\u51fa\u4e00\u4efd\u7b80\u660e\u7684 JSON \u62a5\u544a\uff0c\u4e0e\u6784\u5efa\u4ea7\u7269\u4e00\u540c\u5f52\u6863\uff0c\u65b9\u4fbf\u4e8b\u540e\u53d6\u8bc1\u548c\u5408\u89c4\u5ba1\u6838\u3002\n    <\/li>\n<\/ol>\n<p>\n    \u4ece\u957f\u671f\u6765\u770b\uff0c\u8fd9\u4e2a\u5c0f\u5c0f\u7684\u81ea\u52a8\u5316\u6b65\u9aa4\u8db3\u4ee5\u9632\u6b62\u914d\u7f6e\u6f02\u79fb\uff0c\u5c24\u5176\u662f\u5728\u5e94\u7528\u53d8\u66f4\u3001\u7f51\u7edc\u8def\u7531\u3001DNS \u7ba1\u7406\u5206\u522b\u7531\u4e0d\u540c\u56e2\u961f\u8d1f\u8d23\u7684\u9999\u6e2f\u96c6\u7fa4\u73af\u5883\u4e2d\u3002\n  <\/p>\n<h2><strong>\u5e38\u89c1\u8bef\u914d\u7f6e\u4ee5\u53ca\u5feb\u901f\u4fee\u590d\u601d\u8def<\/strong><\/h2>\n<p>\n    \u5373\u4fbf\u662f\u7ecf\u9a8c\u4e30\u5bcc\u7684\u8fd0\u7ef4\uff0c\u4e5f\u4f1a\u5728\u90ae\u4ef6\u8fc1\u79fb\u8fc7\u7a0b\u4e2d\u8e29\u5230\u4e00\u7ec4\u53cd\u590d\u51fa\u73b0\u7684\u5751\u3002\u63d0\u524d\u8bc6\u522b\u5b83\u4eec\uff0c\u53ef\u4ee5\u5728\u771f\u6b63\u5207\u6362\u7684\u7a97\u53e3\u671f\u91cc\uff0c\u663e\u8457\u964d\u4f4e\u4f60\u7684\u5fc3\u7406\u538b\u529b\u3002\n  <\/p>\n<ul>\n<li>\n      <strong>\u5b8c\u5168\u6ca1\u6709 PTR\u3002<\/strong> \u73b0\u8c61\uff1a\u6240\u6709\u6d4b\u8bd5\u67e5\u8be2\u90fd\u8fd4\u56de\u7a7a\u7ed3\u679c\uff1b\u4fee\u590d\u65b9\u5f0f\uff1a\u8bf7\u6c42\u521b\u5efa\u6307\u5411\u89c4\u8303\u90ae\u4ef6\u4e3b\u673a\u540d\u7684 PTR\uff0c\u5e76\u5728 TTL \u8fc7\u540e\u505a\u9a8c\u8bc1\u3002\n    <\/li>\n<li>\n      <strong>\u53cd\u5411\u6307\u5411\u4e86\u9519\u8bef\u6216\u5931\u6548\u7684\u4e3b\u673a\u540d\u3002<\/strong> \u73b0\u8c61\uff1a\u4e3b\u673a\u540d\u53ef\u4ee5\u89e3\u6790\uff0c\u4f46\u6b63\u5411\u67e5\u8be2\u843d\u5230\u4e86\u522b\u7684 IP \u4e0a\uff1b\u4fee\u590d\u65b9\u5f0f\uff1a\u5bf9\u9f50 A \u6216 AAAA \u8bb0\u5f55\uff0c\u4f7f\u201cIP \u2192 \u4e3b\u673a\u540d \u2192 IP\u201d\u7684\u56de\u8def\u4fdd\u6301\u4e00\u81f4\u3002\n    <\/li>\n<li>\n      <strong>HELO \u5b57\u7b26\u4e32\u4e0d\u4e00\u81f4\u3002<\/strong> \u73b0\u8c61\uff1aDNS \u770b\u8d77\u6765\u6ca1\u95ee\u9898\uff0c\u4f46 SMTP \u4f1a\u8bdd\u91cc\u5c55\u793a\u7684\u662f\u53e6\u5916\u4e00\u4e2a\u4e3b\u673a\u540d\uff1b\u4fee\u590d\u65b9\u5f0f\uff1a\u8c03\u6574 MTA \u914d\u7f6e\uff0c\u8ba9\u5176\u901a\u544a\u89c4\u8303\u540d\u79f0\uff0c\u5e76\u5728\u4e0d\u4e22\u8fde\u63a5\u7684\u524d\u63d0\u4e0b\u5e73\u6ed1\u91cd\u8f7d\u3002\n    <\/li>\n<li>\n      <strong>\u5355\u4e2a IP \u5b58\u5728\u591a\u4e2a PTR \u8bb0\u5f55\u3002<\/strong> \u73b0\u8c61\uff1a\u8bca\u65ad\u5de5\u5177\u663e\u793a\u4e86\u4e00\u6574\u4e32\u4e3b\u673a\u540d\uff1b\u4fee\u590d\u65b9\u5f0f\uff1a\u6536\u655b\u4e3a\u4e00\u4e2a\u4ee5\u90ae\u4ef6\u4e3a\u4e3b\u7684\u552f\u4e00\u53cd\u5411\u6761\u76ee\uff0c\u907f\u514d\u6536\u4ef6\u65b9\u4ea7\u751f\u6b67\u4e49\u3002\n    <\/li>\n<\/ul>\n<p>\n    \u5feb\u901f\u4fee\u590d\u4e0a\u8ff0\u95ee\u9898\uff0c\u901a\u5e38\u8db3\u4ee5\u8ba9\u4e00\u4e2a\u201c\u8fb9\u7f18\u53ef\u7591\u53d1\u9001\u7aef\u201d\u56de\u5230\u66f4\u4e3a\u4e2d\u6027\u7684\u57fa\u7ebf\uff0c\u5c24\u5176\u662f\u5728\u4f60\u5df2\u7ecf\u914d\u7f6e\u4e86\u5408\u7406 SPF \u548c\u7b7e\u540d\u673a\u5236\u7684\u524d\u63d0\u4e0b\u3002\n  <\/p>\n<h2><strong>\u603b\u7ed3\uff1a\u628a PTR \u5f53\u4f5c\u8fc1\u79fb\u7684\u4e00\u7ea7\u5173\u5361<\/strong><\/h2>\n<p>\n    \u5982\u679c\u4f60\u53ea\u628a\u90ae\u4ef6\u8fc1\u79fb\u5f53\u6210\u201c\u5e94\u7528\u642c\u5bb6\u201d\uff0c\u5f88\u5bb9\u6613\u628a DNS \u5f53\u6210\u80cc\u666f\u6c34\u7ba1\u3002\u73b0\u5b9e\u60c5\u51b5\u662f\uff0c\u5bf9\u4e8e\u9999\u6e2f\u8fd9\u6837\u7684\u90e8\u7f72\u73af\u5883\uff0c\u6b63\u786e\u7684\u53cd\u5411\u89e3\u6790\u4e0e TLS \u8bc1\u4e66\u6216\u961f\u5217\u6301\u4e45\u5316\u4e00\u6837\u57fa\u7840\uff0c\u5c5e\u4e8e\u90a3\u7ec4\u51b3\u5b9a\u201c\u751f\u4ea7\u90ae\u4ef6\u662f\u5e73\u6ed1\u843d\u5730\u8fd8\u662f\u76f4\u63a5\u8fdb\u9694\u79bb\u533a\u201d\u7684\u524d\u51e0\u9879\u68c0\u67e5\u3002\n  <\/p>\n<p>\n    \u66f4\u52a1\u5b9e\u7684\u505a\u6cd5\u662f\uff1a\u679a\u4e3e\u6240\u6709\u51fa\u7ad9 IP\uff0c\u5bf9\u9f50\u6b63\u53cd\u5411\u89e3\u6790\uff0c\u628a SMTP \u95ee\u5019\u4e3b\u673a\u540d\u6821\u51c6\u5230\u4f4d\uff0c\u5e76\u9a8c\u8bc1\u771f\u5b9e\u6d41\u91cf\u7684\u884c\u4e3a\u4e0e\u8bbe\u8ba1\u56fe\u5b8c\u5168\u4e00\u81f4\u3002\u53ea\u8981\u628a PTR \u9a8c\u8bc1\u8bbe\u7f6e\u4e3a\u53d8\u66f4\u6d41\u7a0b\u4e2d\u4e0d\u53ef\u8df3\u8fc7\u7684\u95f8\u95e8\uff0c\u4f60\u5c31\u53ef\u4ee5\u5728\u6269\u5c55\u9999\u6e2f\u4ea7\u80fd\u7684\u540c\u65f6\uff0c\u907f\u514d\u727a\u7272\u6295\u9012\u7387\uff0c\u5e76\u4e3a\u672a\u6765\u7684\u4e8b\u6545\u590d\u76d8\u7559\u4e0b\u4e00\u6761\u6e05\u6670\u7684\u5ba1\u8ba1\u94fe\uff0c\u660e\u786e\u8bb0\u5f55\u4f60\u5728\u5207\u6362\u77ac\u95f4\u6bcf\u4e2a <strong>\u9999\u6e2f\u670d\u52a1\u5668 PTR \u8bb0\u5f55<\/strong> \u7684\u72b6\u6001\u3002\n  <\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u5728\u4f60\u628a\u751f\u4ea7\u73af\u5883\u90ae\u4ef6\u7cfb\u7edf\u5207\u6362\u5230\u65b0\u7684\u9999\u6e2f\u8282\u70b9\u4e4b\u524d\uff0c\u5e94\u8be5\u628a\u53cd\u5411 DNS \u5f53\u4f5c\u8fc1\u79fb\u68c0\u67e5\u6e05\u5355\u91cc\u7684\u786c\u6027\u5173\u5361\uff1b\u5982\u679c \u9999\u6e2f\u670d\u52a1\u5668 \u7684 PTR \u8bb0\u5f55\u914d\u7f6e\u9519\u8bef\u6216\u5e72\u8106\u7f3a\u5931\uff0c\u4f60\u51e0\u4e4e\u662f\u5728\u7ed9\u7070\u540d\u5355\u3001\u5783\u573e\u7bb1\u6295\u9012\u548c\u9690\u6027\u6536\u5165\u6d41\u5931\u63d0\u4f9b\u201c\u6807\u51c6\u6559\u7a0b\u201d\u5f0f\u7684\u573a\u666f\u3002 \u5728\u201c\u9ad8\u7ea7\u8fc7\u6ee4\u5668\u201d\u65f6\u4ee3\uff0c\u4e3a\u4ec0\u4e48\u53cd\u5411 DNS \u4f9d\u7136\u5173\u952e \u73b0\u4ee3\u53cd\u5783\u573e\u5f15\u64ce\u4f1a\u8fd0\u884c\u8d1d\u53f6\u65af\u6a21\u578b\u3001\u6d88\u606f\u6307\u7eb9\u3001URL \u4fe1\u8a89\uff0c\u751a\u81f3\u5185\u5bb9\u7ea7\u7684\u673a\u5668\u5b66\u4e60\uff0c\u4f46\u771f\u6b63\u5f00\u59cb\u51b3\u7b56\u524d\uff0c\u5f80\u5f80\u4ecd\u7136\u4f1a\u5148\u505a\u51e0\u6b65\u975e\u5e38\u539f\u59cb\u7684\u5e03\u5c14\u5224\u65ad\uff1a\u8fd9\u4e2a IP \u662f\u5426\u6709\u53cd\u5411 DNS\uff1f\u8fd9\u4e2a\u540d\u5b57\u770b\u8d77\u6765\u662f\u5426\u50cf\u4e00\u4e2a\u6b63\u5e38\u7684\u90ae\u4ef6\u4e3b\u673a\uff1f\u5982\u679c\u4f60\u628a\u90ae\u4ef6\u7cfb\u7edf\u8fc1\u79fb\u5230\u4e00\u4e2a\u5168\u65b0\u7684\u9999\u6e2f IP \u6bb5\uff0c\u5374\u8df3\u8fc7\u4e86 PTR \u6821\u9a8c\uff0c\u90a3\u4e48\u5728\u5185\u5bb9\u8fc7\u6ee4\u5668\u8fd8\u6ca1\u5f00\u59cb\u5de5\u4f5c\u4e4b\u524d\uff0c\u8fd9\u4e9b\u65e9\u671f\u68c0\u67e5\u5c31\u5df2\u7ecf\u5927\u91cf\u5931\u8d25\u4e86\u3002 PTR \u662f\u8bc1\u660e\u201c\u8fd9\u4e2a IP \u4e0d\u662f\u968f\u673a\u5bb6\u5ead\u5bbd\u5e26\u7ec8\u7aef\u201d\u7684\u7b2c\u4e00\u9053\u63e1\u624b\u4fe1\u53f7\u3002 \u9999\u6e2f\u5730\u5740\u6bb5\u627f\u8f7d\u4e86\u5927\u91cf\u8de8\u5883\u6d41\u91cf\uff0c\u56e0\u6b64\u4f1a\u88ab\u66f4\u6fc0\u8fdb\u5730\u5ba1\u67e5\u3002 \u914d\u7f6e\u9519\u8bef\u7684\u53cd\u5411 DNS \u5e38\u5e38\u4f1a\u5728\u786c\u9000\u4fe1\u65e5\u5fd7\u4e2d\u4ee5\u201creverse DNS lookup failed\u201d\u4e4b\u7c7b\u7684\u63cf\u8ff0\u51fa\u73b0\u3002 \u6b63\u56e0\u4e3a\u5982\u6b64\uff0cPTR \u6821\u9a8c\u7edd\u4e0d\u662f\u88c5\u70b9\u95e8\u9762\u7684 DNS \u5c0f\u8c03\u6574\uff0c\u800c\u662f\u4efb\u4f55\u76f4\u63a5\u5bf9\u516c\u7f51\u8bf4 SMTP \u7684\u90ae\u4ef6\u8282\u70b9\u90fd\u9700\u8981\u6ee1\u8db3\u7684\u7ed3\u6784\u6027\u7ea6\u675f\u3002 \u5feb\u901f\u5165\u95e8\uff1aPTR \u4e0e A \u7684\u5dee\u5f02\uff0c\u4ee5\u53ca MTA \u4e3a\u4f55\u5728\u4e4e\u5b83 \u5728 DNS \u8fd9\u4e00\u5c42\uff0c\u4f60\u53ef\u4ee5\u628a A \u8bb0\u5f55\u548c PTR \u770b\u4f5c\u955c\u50cf\u64cd\u4f5c\u3002A \u8bb0\u5f55\u58f0\u660e\u67d0\u4e2a\u4e3b\u673a\u540d\u6620\u5c04\u5230\u4e00\u4e2a IP \u5730\u5740\u3002PTR \u8bb0\u5f55\u5219\u6258\u7ba1\u5728 in-addr.arpa \u6216 [&#8230;]<\/p>\n<p><a class=\"btn btn-secondary understrap-read-more-link\" href=\"https:\/\/www.varidata.com\/zh-cn\/blog\/check-ptr-records-before-hong-kong-mail-server-migration\/\">Read More&#8230;<\/a><\/p>\n","protected":false},"author":11,"featured_media":36173,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[76],"tags":[],"class_list":["post-36177","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-blog"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.2 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>\u9999\u6e2f\u90ae\u4ef6\u670d\u52a1\u5668\u8fc1\u79fb\u524d\u7684 PTR \u8bb0\u5f55\u68c0\u67e5<\/title>\n<meta name=\"description\" content=\"\u5728\u5c06\u90ae\u4ef6\u4e1a\u52a1\u8fc1\u79fb\u5230\u9999\u6e2f\u670d\u52a1\u5668\u4e4b\u524d\uff0c\u5b66\u4e60\u5982\u4f55\u5ba1\u8ba1\u548c\u9a8c\u8bc1 PTR \u8bb0\u5f55\uff0c\u5305\u542b\u547d\u4ee4\u884c\u793a\u4f8b\u3001\u6392\u9519\u8981\u70b9\u4ee5\u53ca\u53cd\u5783\u573e\u7b56\u7565\u3002\u9002\u5408\u6280\u672f\u4eba\u5458\u9605\u8bfb\u3002\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.varidata.com\/zh-cn\/blog\/check-ptr-records-before-hong-kong-mail-server-migration\/\" \/>\n<meta property=\"og:locale\" content=\"zh_CN\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"\u9999\u6e2f\u90ae\u4ef6\u670d\u52a1\u5668\u8fc1\u79fb\u524d\u7684 PTR \u8bb0\u5f55\u68c0\u67e5\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.varidata.com\/zh-cn\/blog\/check-ptr-records-before-hong-kong-mail-server-migration\/\" \/>\n<meta property=\"og:site_name\" content=\"Varidata Limited\" \/>\n<meta property=\"article:published_time\" content=\"2026-09-18T09:31:45+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2026-09-18T09:37:58+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/www.varidata.com\/wp-content\/uploads\/2026\/09\/\u87a2\u5e55\u64f7\u53d6\u756b\u9762-2026-09-18-172937.png\" \/>\n\t<meta property=\"og:image:width\" content=\"614\" \/>\n\t<meta property=\"og:image:height\" content=\"352\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/png\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\\\/\\\/www.varidata.com\\\/zh-cn\\\/blog\\\/check-ptr-records-before-hong-kong-mail-server-migration\\\/#article\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/www.varidata.com\\\/zh-cn\\\/blog\\\/check-ptr-records-before-hong-kong-mail-server-migration\\\/\"},\"author\":\"Varidata\",\"headline\":\"\u9999\u6e2f\u90ae\u4ef6\u670d\u52a1\u5668\u8fc1\u79fb\u524d\u7684 PTR \u8bb0\u5f55\u68c0\u67e5\",\"datePublished\":\"2026-09-18T09:31:45+00:00\",\"dateModified\":\"2026-09-18T09:37:58+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\\\/\\\/www.varidata.com\\\/zh-cn\\\/blog\\\/check-ptr-records-before-hong-kong-mail-server-migration\\\/\"},\"wordCount\":149,\"publisher\":{\"@id\":\"https:\\\/\\\/www.varidata.com\\\/zh-cn\\\/#organization\"},\"image\":{\"@id\":\"https:\\\/\\\/www.varidata.com\\\/zh-cn\\\/blog\\\/check-ptr-records-before-hong-kong-mail-server-migration\\\/#primaryimage\"},\"thumbnailUrl\":\"https:\\\/\\\/www.varidata.com\\\/wp-content\\\/uploads\\\/2026\\\/09\\\/\u87a2\u5e55\u64f7\u53d6\u756b\u9762-2026-09-18-172937.png\",\"articleSection\":[\"Varidata \u5b98\u65b9\u535a\u5ba2\"],\"inLanguage\":\"zh-SC\"},{\"@type\":\"WebPage\",\"@id\":\"https:\\\/\\\/www.varidata.com\\\/zh-cn\\\/blog\\\/check-ptr-records-before-hong-kong-mail-server-migration\\\/\",\"url\":\"https:\\\/\\\/www.varidata.com\\\/zh-cn\\\/blog\\\/check-ptr-records-before-hong-kong-mail-server-migration\\\/\",\"name\":\"\u9999\u6e2f\u90ae\u4ef6\u670d\u52a1\u5668\u8fc1\u79fb\u524d\u7684 PTR \u8bb0\u5f55\u68c0\u67e5\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/www.varidata.com\\\/zh-cn\\\/#website\"},\"primaryImageOfPage\":{\"@id\":\"https:\\\/\\\/www.varidata.com\\\/zh-cn\\\/blog\\\/check-ptr-records-before-hong-kong-mail-server-migration\\\/#primaryimage\"},\"image\":{\"@id\":\"https:\\\/\\\/www.varidata.com\\\/zh-cn\\\/blog\\\/check-ptr-records-before-hong-kong-mail-server-migration\\\/#primaryimage\"},\"thumbnailUrl\":\"https:\\\/\\\/www.varidata.com\\\/wp-content\\\/uploads\\\/2026\\\/09\\\/\u87a2\u5e55\u64f7\u53d6\u756b\u9762-2026-09-18-172937.png\",\"datePublished\":\"2026-09-18T09:31:45+00:00\",\"dateModified\":\"2026-09-18T09:37:58+00:00\",\"description\":\"\u5728\u5c06\u90ae\u4ef6\u4e1a\u52a1\u8fc1\u79fb\u5230\u9999\u6e2f\u670d\u52a1\u5668\u4e4b\u524d\uff0c\u5b66\u4e60\u5982\u4f55\u5ba1\u8ba1\u548c\u9a8c\u8bc1 PTR \u8bb0\u5f55\uff0c\u5305\u542b\u547d\u4ee4\u884c\u793a\u4f8b\u3001\u6392\u9519\u8981\u70b9\u4ee5\u53ca\u53cd\u5783\u573e\u7b56\u7565\u3002\u9002\u5408\u6280\u672f\u4eba\u5458\u9605\u8bfb\u3002\",\"breadcrumb\":{\"@id\":\"https:\\\/\\\/www.varidata.com\\\/zh-cn\\\/blog\\\/check-ptr-records-before-hong-kong-mail-server-migration\\\/#breadcrumb\"},\"inLanguage\":\"zh-SC\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\\\/\\\/www.varidata.com\\\/zh-cn\\\/blog\\\/check-ptr-records-before-hong-kong-mail-server-migration\\\/\"]}]},{\"@type\":\"ImageObject\",\"inLanguage\":\"zh-SC\",\"@id\":\"https:\\\/\\\/www.varidata.com\\\/zh-cn\\\/blog\\\/check-ptr-records-before-hong-kong-mail-server-migration\\\/#primaryimage\",\"url\":\"https:\\\/\\\/www.varidata.com\\\/wp-content\\\/uploads\\\/2026\\\/09\\\/\u87a2\u5e55\u64f7\u53d6\u756b\u9762-2026-09-18-172937.png\",\"contentUrl\":\"https:\\\/\\\/www.varidata.com\\\/wp-content\\\/uploads\\\/2026\\\/09\\\/\u87a2\u5e55\u64f7\u53d6\u756b\u9762-2026-09-18-172937.png\",\"width\":614,\"height\":352,\"caption\":\"\u9999\u6e2f\u90ae\u4ef6\u670d\u52a1\u5668\u8fc1\u79fb\u524d PTR \u8bb0\u5f55\u68c0\u67e5\u6e05\u5355\"},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\\\/\\\/www.varidata.com\\\/zh-cn\\\/blog\\\/check-ptr-records-before-hong-kong-mail-server-migration\\\/#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Home\",\"item\":\"https:\\\/\\\/www.varidata.com\\\/zh-cn\\\/\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"\u9999\u6e2f\u90ae\u4ef6\u670d\u52a1\u5668\u8fc1\u79fb\u524d\u7684 PTR \u8bb0\u5f55\u68c0\u67e5\"}]},{\"@type\":\"WebSite\",\"@id\":\"https:\\\/\\\/www.varidata.com\\\/zh-cn\\\/#website\",\"url\":\"https:\\\/\\\/www.varidata.com\\\/zh-cn\\\/\",\"name\":\"Varidata Limited\",\"description\":\"\",\"publisher\":{\"@id\":\"https:\\\/\\\/www.varidata.com\\\/zh-cn\\\/#organization\"},\"potentialAction\":[{\"@type\":\"SearchAction\",\"target\":{\"@type\":\"EntryPoint\",\"urlTemplate\":\"https:\\\/\\\/www.varidata.com\\\/zh-cn\\\/?s={search_term_string}\"},\"query-input\":{\"@type\":\"PropertyValueSpecification\",\"valueRequired\":true,\"valueName\":\"search_term_string\"}}],\"inLanguage\":\"zh-SC\"},{\"@type\":\"Organization\",\"@id\":\"https:\\\/\\\/www.varidata.com\\\/zh-cn\\\/#organization\",\"name\":\"Varidata\",\"url\":\"https:\\\/\\\/www.varidata.com\\\/zh-cn\\\/\",\"logo\":{\"@type\":\"ImageObject\",\"inLanguage\":\"zh-SC\",\"@id\":\"https:\\\/\\\/www.varidata.com\\\/zh-cn\\\/#\\\/schema\\\/logo\\\/image\\\/\",\"url\":\"https:\\\/\\\/www.varidata.com\\\/wp-content\\\/uploads\\\/2021\\\/09\\\/varidata_logo_white_-748x480_hor_web-1.png\",\"contentUrl\":\"https:\\\/\\\/www.varidata.com\\\/wp-content\\\/uploads\\\/2021\\\/09\\\/varidata_logo_white_-748x480_hor_web-1.png\",\"width\":248,\"height\":94,\"caption\":\"Varidata\"},\"image\":{\"@id\":\"https:\\\/\\\/www.varidata.com\\\/zh-cn\\\/#\\\/schema\\\/logo\\\/image\\\/\"}},{\"@type\":\"Person\",\"@id\":\"https:\\\/\\\/www.varidata.com\\\/zh-cn\\\/#\\\/schema\\\/person\\\/afeb2203681f7919a757a02690f38abd\",\"name\":\"Daisy Yu\",\"image\":{\"@type\":\"ImageObject\",\"inLanguage\":\"zh-SC\",\"@id\":\"https:\\\/\\\/secure.gravatar.com\\\/avatar\\\/38db59364245f7a04c07a2888056fc3db37247c1af72457af92d8001da594989?s=96&d=mm&r=g\",\"url\":\"https:\\\/\\\/secure.gravatar.com\\\/avatar\\\/38db59364245f7a04c07a2888056fc3db37247c1af72457af92d8001da594989?s=96&d=mm&r=g\",\"contentUrl\":\"https:\\\/\\\/secure.gravatar.com\\\/avatar\\\/38db59364245f7a04c07a2888056fc3db37247c1af72457af92d8001da594989?s=96&d=mm&r=g\",\"caption\":\"Daisy Yu\"}}]}<\/script>\n<!-- \/ Yoast SEO plugin. -->","yoast_head_json":{"title":"\u9999\u6e2f\u90ae\u4ef6\u670d\u52a1\u5668\u8fc1\u79fb\u524d\u7684 PTR \u8bb0\u5f55\u68c0\u67e5","description":"\u5728\u5c06\u90ae\u4ef6\u4e1a\u52a1\u8fc1\u79fb\u5230\u9999\u6e2f\u670d\u52a1\u5668\u4e4b\u524d\uff0c\u5b66\u4e60\u5982\u4f55\u5ba1\u8ba1\u548c\u9a8c\u8bc1 PTR \u8bb0\u5f55\uff0c\u5305\u542b\u547d\u4ee4\u884c\u793a\u4f8b\u3001\u6392\u9519\u8981\u70b9\u4ee5\u53ca\u53cd\u5783\u573e\u7b56\u7565\u3002\u9002\u5408\u6280\u672f\u4eba\u5458\u9605\u8bfb\u3002","robots":{"index":"index","follow":"follow","max-snippet":"max-snippet:-1","max-image-preview":"max-image-preview:large","max-video-preview":"max-video-preview:-1"},"canonical":"https:\/\/www.varidata.com\/zh-cn\/blog\/check-ptr-records-before-hong-kong-mail-server-migration\/","og_locale":"zh_CN","og_type":"article","og_title":"\u9999\u6e2f\u90ae\u4ef6\u670d\u52a1\u5668\u8fc1\u79fb\u524d\u7684 PTR \u8bb0\u5f55\u68c0\u67e5","og_url":"https:\/\/www.varidata.com\/zh-cn\/blog\/check-ptr-records-before-hong-kong-mail-server-migration\/","og_site_name":"Varidata Limited","article_published_time":"2026-09-18T09:31:45+00:00","article_modified_time":"2026-09-18T09:37:58+00:00","og_image":[{"width":614,"height":352,"url":"https:\/\/www.varidata.com\/wp-content\/uploads\/2026\/09\/\u87a2\u5e55\u64f7\u53d6\u756b\u9762-2026-09-18-172937.png","type":"image\/png"}],"schema":{"@context":"https:\/\/schema.org","@graph":[{"@type":"Article","@id":"https:\/\/www.varidata.com\/zh-cn\/blog\/check-ptr-records-before-hong-kong-mail-server-migration\/#article","isPartOf":{"@id":"https:\/\/www.varidata.com\/zh-cn\/blog\/check-ptr-records-before-hong-kong-mail-server-migration\/"},"author":"Varidata","headline":"\u9999\u6e2f\u90ae\u4ef6\u670d\u52a1\u5668\u8fc1\u79fb\u524d\u7684 PTR \u8bb0\u5f55\u68c0\u67e5","datePublished":"2026-09-18T09:31:45+00:00","dateModified":"2026-09-18T09:37:58+00:00","mainEntityOfPage":{"@id":"https:\/\/www.varidata.com\/zh-cn\/blog\/check-ptr-records-before-hong-kong-mail-server-migration\/"},"wordCount":149,"publisher":{"@id":"https:\/\/www.varidata.com\/zh-cn\/#organization"},"image":{"@id":"https:\/\/www.varidata.com\/zh-cn\/blog\/check-ptr-records-before-hong-kong-mail-server-migration\/#primaryimage"},"thumbnailUrl":"https:\/\/www.varidata.com\/wp-content\/uploads\/2026\/09\/\u87a2\u5e55\u64f7\u53d6\u756b\u9762-2026-09-18-172937.png","articleSection":["Varidata \u5b98\u65b9\u535a\u5ba2"],"inLanguage":"zh-SC"},{"@type":"WebPage","@id":"https:\/\/www.varidata.com\/zh-cn\/blog\/check-ptr-records-before-hong-kong-mail-server-migration\/","url":"https:\/\/www.varidata.com\/zh-cn\/blog\/check-ptr-records-before-hong-kong-mail-server-migration\/","name":"\u9999\u6e2f\u90ae\u4ef6\u670d\u52a1\u5668\u8fc1\u79fb\u524d\u7684 PTR \u8bb0\u5f55\u68c0\u67e5","isPartOf":{"@id":"https:\/\/www.varidata.com\/zh-cn\/#website"},"primaryImageOfPage":{"@id":"https:\/\/www.varidata.com\/zh-cn\/blog\/check-ptr-records-before-hong-kong-mail-server-migration\/#primaryimage"},"image":{"@id":"https:\/\/www.varidata.com\/zh-cn\/blog\/check-ptr-records-before-hong-kong-mail-server-migration\/#primaryimage"},"thumbnailUrl":"https:\/\/www.varidata.com\/wp-content\/uploads\/2026\/09\/\u87a2\u5e55\u64f7\u53d6\u756b\u9762-2026-09-18-172937.png","datePublished":"2026-09-18T09:31:45+00:00","dateModified":"2026-09-18T09:37:58+00:00","description":"\u5728\u5c06\u90ae\u4ef6\u4e1a\u52a1\u8fc1\u79fb\u5230\u9999\u6e2f\u670d\u52a1\u5668\u4e4b\u524d\uff0c\u5b66\u4e60\u5982\u4f55\u5ba1\u8ba1\u548c\u9a8c\u8bc1 PTR \u8bb0\u5f55\uff0c\u5305\u542b\u547d\u4ee4\u884c\u793a\u4f8b\u3001\u6392\u9519\u8981\u70b9\u4ee5\u53ca\u53cd\u5783\u573e\u7b56\u7565\u3002\u9002\u5408\u6280\u672f\u4eba\u5458\u9605\u8bfb\u3002","breadcrumb":{"@id":"https:\/\/www.varidata.com\/zh-cn\/blog\/check-ptr-records-before-hong-kong-mail-server-migration\/#breadcrumb"},"inLanguage":"zh-SC","potentialAction":[{"@type":"ReadAction","target":["https:\/\/www.varidata.com\/zh-cn\/blog\/check-ptr-records-before-hong-kong-mail-server-migration\/"]}]},{"@type":"ImageObject","inLanguage":"zh-SC","@id":"https:\/\/www.varidata.com\/zh-cn\/blog\/check-ptr-records-before-hong-kong-mail-server-migration\/#primaryimage","url":"https:\/\/www.varidata.com\/wp-content\/uploads\/2026\/09\/\u87a2\u5e55\u64f7\u53d6\u756b\u9762-2026-09-18-172937.png","contentUrl":"https:\/\/www.varidata.com\/wp-content\/uploads\/2026\/09\/\u87a2\u5e55\u64f7\u53d6\u756b\u9762-2026-09-18-172937.png","width":614,"height":352,"caption":"\u9999\u6e2f\u90ae\u4ef6\u670d\u52a1\u5668\u8fc1\u79fb\u524d PTR \u8bb0\u5f55\u68c0\u67e5\u6e05\u5355"},{"@type":"BreadcrumbList","@id":"https:\/\/www.varidata.com\/zh-cn\/blog\/check-ptr-records-before-hong-kong-mail-server-migration\/#breadcrumb","itemListElement":[{"@type":"ListItem","position":1,"name":"Home","item":"https:\/\/www.varidata.com\/zh-cn\/"},{"@type":"ListItem","position":2,"name":"\u9999\u6e2f\u90ae\u4ef6\u670d\u52a1\u5668\u8fc1\u79fb\u524d\u7684 PTR \u8bb0\u5f55\u68c0\u67e5"}]},{"@type":"WebSite","@id":"https:\/\/www.varidata.com\/zh-cn\/#website","url":"https:\/\/www.varidata.com\/zh-cn\/","name":"Varidata Limited","description":"","publisher":{"@id":"https:\/\/www.varidata.com\/zh-cn\/#organization"},"potentialAction":[{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https:\/\/www.varidata.com\/zh-cn\/?s={search_term_string}"},"query-input":{"@type":"PropertyValueSpecification","valueRequired":true,"valueName":"search_term_string"}}],"inLanguage":"zh-SC"},{"@type":"Organization","@id":"https:\/\/www.varidata.com\/zh-cn\/#organization","name":"Varidata","url":"https:\/\/www.varidata.com\/zh-cn\/","logo":{"@type":"ImageObject","inLanguage":"zh-SC","@id":"https:\/\/www.varidata.com\/zh-cn\/#\/schema\/logo\/image\/","url":"https:\/\/www.varidata.com\/wp-content\/uploads\/2021\/09\/varidata_logo_white_-748x480_hor_web-1.png","contentUrl":"https:\/\/www.varidata.com\/wp-content\/uploads\/2021\/09\/varidata_logo_white_-748x480_hor_web-1.png","width":248,"height":94,"caption":"Varidata"},"image":{"@id":"https:\/\/www.varidata.com\/zh-cn\/#\/schema\/logo\/image\/"}},{"@type":"Person","@id":"https:\/\/www.varidata.com\/zh-cn\/#\/schema\/person\/afeb2203681f7919a757a02690f38abd","name":"Daisy Yu","image":{"@type":"ImageObject","inLanguage":"zh-SC","@id":"https:\/\/secure.gravatar.com\/avatar\/38db59364245f7a04c07a2888056fc3db37247c1af72457af92d8001da594989?s=96&d=mm&r=g","url":"https:\/\/secure.gravatar.com\/avatar\/38db59364245f7a04c07a2888056fc3db37247c1af72457af92d8001da594989?s=96&d=mm&r=g","contentUrl":"https:\/\/secure.gravatar.com\/avatar\/38db59364245f7a04c07a2888056fc3db37247c1af72457af92d8001da594989?s=96&d=mm&r=g","caption":"Daisy Yu"}}]}},"_links":{"self":[{"href":"https:\/\/www.varidata.com\/zh-cn\/wp-json\/wp\/v2\/posts\/36177","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.varidata.com\/zh-cn\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.varidata.com\/zh-cn\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.varidata.com\/zh-cn\/wp-json\/wp\/v2\/users\/11"}],"replies":[{"embeddable":true,"href":"https:\/\/www.varidata.com\/zh-cn\/wp-json\/wp\/v2\/comments?post=36177"}],"version-history":[{"count":2,"href":"https:\/\/www.varidata.com\/zh-cn\/wp-json\/wp\/v2\/posts\/36177\/revisions"}],"predecessor-version":[{"id":36185,"href":"https:\/\/www.varidata.com\/zh-cn\/wp-json\/wp\/v2\/posts\/36177\/revisions\/36185"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.varidata.com\/zh-cn\/wp-json\/wp\/v2\/media\/36173"}],"wp:attachment":[{"href":"https:\/\/www.varidata.com\/zh-cn\/wp-json\/wp\/v2\/media?parent=36177"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.varidata.com\/zh-cn\/wp-json\/wp\/v2\/categories?post=36177"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.varidata.com\/zh-cn\/wp-json\/wp\/v2\/tags?post=36177"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}