{"id":30305,"date":"2026-02-23T15:42:51","date_gmt":"2026-02-23T07:42:51","guid":{"rendered":"https:\/\/www.varidata.com\/uncategorized-zh-cn\/fix-gmail-email-rejection-caused-by-dns-ptr-issues\/"},"modified":"2026-02-23T15:53:09","modified_gmt":"2026-02-23T07:53:09","slug":"fix-gmail-email-rejection-caused-by-dns-ptr-issues","status":"publish","type":"post","link":"https:\/\/www.varidata.com\/zh-cn\/blog\/fix-gmail-email-rejection-caused-by-dns-ptr-issues\/","title":{"rendered":"\u5982\u4f55\u89e3\u51b3\u56e0 DNS PTR \u8bb0\u5f55\u95ee\u9898\u5bfc\u81f4 Gmail \u62d2\u6536\u90ae\u4ef6"},"content":{"rendered":"<style>\n    table, th, td {\n        border: 1px solid black;\n        border-collapse: collapse;\n    }\n<\/style>\n<p>\u5f53 Gmail \u56e0 DNS PTR \u8bb0\u5f55\u95ee\u9898\u62d2\u7edd\u63a5\u6536\u60a8\u7684\u90ae\u4ef6\u65f6\uff0c\u60a8\u53ef\u80fd\u4f1a\u611f\u5230\u975e\u5e38\u6cae\u4e27\u3002\u968f\u7740 <a target=\"_self\" href=\"https:\/\/www.varidata.com\/zh-cn\/blog\/how-google-server-location-changes-impact-us-access\/\">Google<\/a> \u52a0\u5f3a\u53d1\u4ef6\u4eba\u8981\u6c42\uff0c\u5c24\u5176\u662f\u5728\u4f7f\u7528\u6d77\u5916\u57fa\u7840\u8bbe\u65bd\uff08\u4f8b\u5982 <a target=\"_blank\" href=\"https:\/\/www.varidata.com\/zh-cn\/server\/tokyo\/cn2\/\">\u65e5\u672c\u670d\u52a1\u5668\u79df\u7528<\/a> \u73af\u5883\uff09\u53d1\u9001\u90ae\u4ef6\u65f6\uff0c\u8d8a\u6765\u8d8a\u591a\u7684\u7528\u6237\u906d\u9047\u6765\u81ea Gmail \u7684\u9000\u4fe1\u3002\u60a8\u53ef\u80fd\u4f1a\u770b\u5230\u9519\u8bef\u4ee3\u7801 550-5.7.25\uff0c\u8fd9\u901a\u5e38\u8868\u793a\u7f3a\u5c11 PTR \u8bb0\u5f55\u3002\u65e0\u8bba\u60a8\u7684\u670d\u52a1\u5668\u4f4d\u4e8e\u672c\u5730\u8fd8\u662f\u90e8\u7f72\u5728\u65e5\u672c\u670d\u52a1\u5668\u79df\u7528\u5e73\u53f0\uff0c\u8fd9\u7c7b DNS \u95ee\u9898\u90fd\u4f1a\u5bf9\u90ae\u4ef6\u6295\u9012\u9020\u6210\u4e25\u91cd\u969c\u788d\u3002\u5982\u679c\u60a8\u5e0c\u671b\u6062\u590d\u7a33\u5b9a\u53ef\u9760\u7684\u901a\u4fe1\uff0c\u5c31\u9700\u8981\u9010\u6b65\u89e3\u51b3\u8fd9\u4e9b\u95ee\u9898\u3002<\/p>\n<h2>\u6838\u5fc3\u8981\u70b9<\/h2>\n<ul>\n<li>\n<p>\u68c0\u67e5 Gmail \u7684\u9519\u8bef\u4fe1\u606f\u4ee5\u8bc6\u522b\u90ae\u4ef6\u6295\u9012\u95ee\u9898\u3002\u67e5\u627e\u8bf8\u5982 550-5.7.25 \u7b49\u8868\u793a\u7f3a\u5c11 PTR \u8bb0\u5f55\u7684\u4ee3\u7801\u3002<\/p>\n<\/li>\n<li>\n<p>\u4f7f\u7528 EasyDMARC \u6216 <code>nslookup<\/code> \u547d\u4ee4\u9a8c\u8bc1\u60a8\u7684 PTR \u8bb0\u5f55\u3002\u786e\u4fdd\u60a8\u7684\u53d1\u9001 IP \u62e5\u6709\u6709\u6548\u7684 PTR \u8bb0\u5f55\uff0c\u4ee5\u907f\u514d\u88ab\u62d2\u6536\u3002<\/p>\n<\/li>\n<li>\n<p>\u5339\u914d\u60a8\u7684 PTR \u548c A \u8bb0\u5f55\u4ee5\u63d0\u5347\u90ae\u4ef6\u9001\u8fbe\u7387\u3002\u6267\u884c\u53cd\u5411\u548c\u6b63\u5411 DNS \u67e5\u8be2\uff0c\u786e\u8ba4\u4e8c\u8005\u4e00\u81f4\u3002<\/p>\n<\/li>\n<li>\n<p>\u5b9a\u671f\u76d1\u63a7\u60a8\u7684 DNS \u8bbe\u7f6e\u548c PTR \u8bb0\u5f55\u3002\u5efa\u8bae\u6bcf\u9694\u51e0\u4e2a\u6708\u68c0\u67e5\u4e00\u6b21\uff0c\u4ee5\u9632\u6b62\u672a\u6765\u51fa\u73b0\u90ae\u4ef6\u6295\u9012\u95ee\u9898\u3002<\/p>\n<\/li>\n<li>\n<p>\u5982\u679c\u53d1\u73b0\u4e0d\u5339\u914d\u60c5\u51b5\uff0c\u8bf7\u53ca\u65f6\u66f4\u65b0 DNS \u8bbe\u7f6e\u3002\u6b63\u786e\u7684\u914d\u7f6e\u6709\u52a9\u4e8e\u7ef4\u62a4\u53d1\u4ef6\u4eba\u4fe1\u8a89\uff0c\u5e76\u786e\u4fdd\u90ae\u4ef6\u8fdb\u5165\u6536\u4ef6\u7bb1\u3002<\/p>\n<\/li>\n<\/ul>\n<h2>\u4fee\u590d Gmail PTR \u8bb0\u5f55\u95ee\u9898<\/h2>\n<h3>\u8bc6\u522b Gmail \u9519\u8bef\u4fe1\u606f<\/h3>\n<p>\u5f53 Gmail \u62d2\u7edd\u63a5\u6536\u60a8\u7684\u90ae\u4ef6\u65f6\uff0c\u901a\u5e38\u4f1a\u663e\u793a\u7279\u5b9a\u7684\u9519\u8bef\u4fe1\u606f\u3002\u8fd9\u4e9b\u4fe1\u606f\u53ef\u4ee5\u5e2e\u52a9\u60a8\u4e86\u89e3\u95ee\u9898\u7684\u6839\u672c\u539f\u56e0\u3002\u60a8\u5e94\u59cb\u7ec8\u67e5\u770b\u9000\u4fe1\u6216\u62d2\u6536\u901a\u77e5\u4e2d\u7684\u63d0\u793a\u3002\u4e0e PTR \u8bb0\u5f55\u5931\u8d25\u76f8\u5173\u7684\u5e38\u89c1 Gmail \u9519\u8bef\u4ee3\u7801\u5982\u4e0b\u8868\u6240\u793a\uff1a<\/p>\n<div fullwidth=\"\" class=\"qc-default-table-wrapper \">\n<table style=\"min-width: 50px;\">\n<colgroup>\n<col style=\"min-width: 25px;\">\n<col style=\"min-width: 25px;\"><\/colgroup>\n<tbody>\n<tr>\n<th colspan=\"1\" rowspan=\"1\">\n<p>\u9519\u8bef\u4fe1\u606f<\/p>\n<\/th>\n<th colspan=\"1\" rowspan=\"1\">\n<p>\u8bf4\u660e<\/p>\n<\/th>\n<\/tr>\n<tr>\n<td colspan=\"1\" rowspan=\"1\">\n<p>421 4.7.23<\/p>\n<\/td>\n<td colspan=\"1\" rowspan=\"1\">\n<p>\u53d1\u9001\u6b64\u90ae\u4ef6\u7684 IP \u5730\u5740\u6ca1\u6709 PTR \u8bb0\u5f55\uff0c\u6216\u5bf9\u5e94\u7684\u6b63\u5411 DNS \u8bb0\u5f55\u4e0e\u53d1\u9001 IP \u4e0d\u5339\u914d\u3002\u4e3a\u4fdd\u62a4\u7528\u6237\u514d\u53d7\u5783\u573e\u90ae\u4ef6\u5f71\u54cd\uff0c\u90ae\u4ef6\u5df2\u88ab\u4e34\u65f6\u9650\u901f\u3002<\/p>\n<\/td>\n<\/tr>\n<tr>\n<td colspan=\"1\" rowspan=\"1\">\n<p>550-5.7.25<\/p>\n<\/td>\n<td colspan=\"1\" rowspan=\"1\">\n<p>\u53d1\u9001\u6b64\u90ae\u4ef6\u7684 IP \u5730\u5740\u672a\u8bbe\u7f6e PTR \u8bb0\u5f55\u3002\u6839\u636e\u653f\u7b56\uff0cGmail \u4e0d\u63a5\u53d7\u6765\u81ea\u7f3a\u5c11 PTR \u8bb0\u5f55\u7684 IP \u7684\u90ae\u4ef6\u3002<\/p>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<p>\u60a8\u4e5f\u53ef\u80fd\u770b\u5230\u4ee5\u4e0b\u4ee3\u7801\uff1a<\/p>\n<div fullwidth=\"\" class=\"qc-default-table-wrapper \">\n<table style=\"min-width: 50px;\">\n<colgroup>\n<col style=\"min-width: 25px;\">\n<col style=\"min-width: 25px;\"><\/colgroup>\n<tbody>\n<tr>\n<th colspan=\"1\" rowspan=\"1\">\n<p>\u4ee3\u7801<\/p>\n<\/th>\n<th colspan=\"1\" rowspan=\"1\">\n<p>\u542b\u4e49<\/p>\n<\/th>\n<\/tr>\n<tr>\n<td colspan=\"1\" rowspan=\"1\">\n<p>550-5.7.25<\/p>\n<\/td>\n<td colspan=\"1\" rowspan=\"1\">\n<p>\u56e0\u7f3a\u5c11\/\u4e0d\u5339\u914d\u7684 PTR \u8bb0\u5f55\u800c\u88ab\u963b\u6b62<\/p>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<p>\u5982\u679c\u60a8\u770b\u5230\u8fd9\u4e9b\u9519\u8bef\uff0c\u5c31\u53ef\u4ee5\u786e\u8ba4 Gmail \u56e0 DNS \u6216 PTR \u95ee\u9898\u62d2\u7edd\u63a5\u6536\u60a8\u7684\u90ae\u4ef6\u3002<\/p>\n<h3>\u68c0\u67e5\u53d1\u9001 IP \u7684 PTR \u8bb0\u5f55<\/h3>\n<p>\u60a8\u9700\u8981\u9a8c\u8bc1\u53d1\u9001 IP \u5730\u5740\u7684 PTR \u8bb0\u5f55\u3002\u8fd9\u4e00\u6b65\u6709\u52a9\u4e8e\u786e\u8ba4 DNS \u662f\u5426\u6b63\u786e\u914d\u7f6e\u3002\u60a8\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u5de5\u5177\u68c0\u67e5 PTR \u8bb0\u5f55\uff1a<\/p>\n<ul>\n<li>\n<p>EasyDMARC \u7684 PTR \u68c0\u67e5\u5de5\u5177\uff0c\u53ef\u8f93\u5165\u57df\u540d\u6216 IP \u5730\u5740\u5feb\u901f\u67e5\u770b\u7ed3\u679c\u3002<\/p>\n<\/li>\n<li>\n<p>DMARC DKIM PTR Reverse IP Lookup\uff0c\u53ef\u8f93\u5165 IP \u5730\u5740\u8fdb\u884c PTR \u67e5\u8be2\u3002<\/p>\n<\/li>\n<li>\n<p>\u5728\u547d\u4ee4\u63d0\u793a\u7b26\u6216\u7ec8\u7aef\u4e2d\u4f7f\u7528 <code>nslookup<\/code> \u547d\u4ee4\u68c0\u67e5 PTR \u8bb0\u5f55\u3002<\/p>\n<\/li>\n<\/ul>\n<p>\u4f7f\u7528\u547d\u4ee4\u884c\u7684\u65b9\u6cd5\uff1a<\/p>\n<ol>\n<li>\n<p>\u6253\u5f00\u547d\u4ee4\u63d0\u793a\u7b26\u6216\u7ec8\u7aef\u3002<\/p>\n<\/li>\n<li>\n<p>\u8f93\u5165 <code>nslookup &lt;IP_address&gt;<\/code> \u6216 <code>dig &lt;domain&gt; ptr<\/code>\u3002<\/p>\n<\/li>\n<li>\n<p>\u67e5\u770b\u8f93\u51fa\u7ed3\u679c\u4e2d\u7684 PTR \u8bb0\u5f55\u3002<\/p>\n<\/li>\n<\/ol>\n<p>\u5982\u679c\u60a8\u4f7f\u7528\u591a\u4e2a\u5916\u53d1 IP \u5730\u5740\u53d1\u9001\u90ae\u4ef6\uff0c\u8bf7\u68c0\u67e5\u6bcf\u4e00\u4e2a IP\u3002Gmail \u53ef\u80fd\u4f1a\u963b\u6b62\u4efb\u4f55\u6ca1\u6709\u6709\u6548 PTR \u8bb0\u5f55\u7684 IP \u53d1\u51fa\u7684\u90ae\u4ef6\u3002<\/p>\n<h3>\u5339\u914d PTR \u548c A \u8bb0\u5f55<\/h3>\n<p>\u60a8\u5fc5\u987b\u786e\u4fdd PTR \u8bb0\u5f55\u4e0e A \u8bb0\u5f55\u76f8\u5339\u914d\u3002\u8be5\u8fc7\u7a0b\u5305\u62ec\u4e24\u4e2a\u4e3b\u8981\u6b65\u9aa4\uff1a<\/p>\n<ol>\n<li>\n<p>\u6267\u884c\u53cd\u5411 DNS \u67e5\u8be2\uff0c\u901a\u8fc7 PTR \u8bb0\u5f55\u627e\u5230\u4e0e IP \u5730\u5740\u5173\u8054\u7684\u57df\u540d\u3002<\/p>\n<\/li>\n<li>\n<p>\u5bf9\u8be5\u57df\u540d\u6267\u884c\u6b63\u5411 DNS \u67e5\u8be2\uff0c\u786e\u8ba4\u5176\u662f\u5426\u89e3\u6790\u56de\u539f\u59cb IP \u5730\u5740\u3002<\/p>\n<\/li>\n<\/ol>\n<blockquote>\n<p>PTR \u4e0e A \u8bb0\u5f55\u4e0d\u5339\u914d\u4f1a\u4e25\u91cd\u5f71\u54cd\u90ae\u4ef6\u9001\u8fbe\u7387\uff0c\u5c24\u5176\u4f1a\u5f71\u54cd Gmail \u53ca\u5176\u4ed6\u90ae\u4ef6\u670d\u52a1\u5546\u7684\u63a5\u6536\u7387\u3002\u5982\u679c PTR \u8bb0\u5f55\u65e0\u6cd5\u6b63\u786e\u89e3\u6790\u5230\u53d1\u9001\u57df\u540d\uff0c\u6216\u4e0e A \u8bb0\u5f55\u4e0d\u4e00\u81f4\uff0c\u90ae\u4ef6\u53ef\u80fd\u4f1a\u88ab\u62d2\u6536\u6216\u6807\u8bb0\u4e3a\u5783\u573e\u90ae\u4ef6\uff0c\u4ece\u800c\u635f\u5bb3\u53d1\u4ef6\u4eba\u4fe1\u8a89\u548c\u6295\u9012\u6210\u529f\u7387\u3002<\/p>\n<\/blockquote>\n<p>\u8bb8\u591a\u90ae\u4ef6\u670d\u52a1\u5668\u4f1a\u62d2\u7edd\u6765\u81ea\u6ca1\u6709 PTR \u8bb0\u5f55\u7684 IP \u5730\u5740\u7684\u8fde\u63a5\uff0c\u4ece\u800c\u5bfc\u81f4\u5373\u65f6\u6295\u9012\u5931\u8d25\u3002\u957f\u671f\u7f3a\u5931 PTR \u8bb0\u5f55\u8fd8\u4f1a\u635f\u5bb3\u60a8\u7684\u53d1\u4ef6\u4eba\u4fe1\u8a89\u3002<\/p>\n<h3>\u66f4\u65b0 DNS \u8bbe\u7f6e<\/h3>\n<p>\u5982\u679c\u60a8\u53d1\u73b0 PTR \u6216 A \u8bb0\u5f55\u5b58\u5728\u95ee\u9898\uff0c\u5c31\u9700\u8981\u66f4\u65b0 DNS \u8bbe\u7f6e\u3002\u8bf7\u6309\u7167\u4ee5\u4e0b\u6b65\u9aa4\u64cd\u4f5c\uff1a<\/p>\n<ol>\n<li>\n<p>\u9009\u62e9\u201c\u4ec5\u5728 DHCP \u5ba2\u6237\u7aef\u8bf7\u6c42\u65f6\u52a8\u6001\u66f4\u65b0 DNS A \u548c PTR \u8bb0\u5f55\u201d\u3002\u8fd9\u53ef\u786e\u4fdd A \u8bb0\u5f55\u7531\u5ba2\u6237\u7aef\u6ce8\u518c\uff0cPTR \u8bb0\u5f55\u7531 DHCP \u6ce8\u518c\u3002<\/p>\n<\/li>\n<li>\n<p>\u5728 DHCP \u63a7\u5236\u53f0\u4e2d\u8bbe\u7f6e\u5fc5\u8981\u7684\u51ed\u636e\uff0c\u4ee5\u5141\u8bb8\u6b63\u786e\u6ce8\u518c\u3002<\/p>\n<\/li>\n<li>\n<p>\u5728 DNS \u670d\u52a1\u5668\u4e0a\u5c06 DHCP \u670d\u52a1\u5668\u4ece DNSUpdateProxy \u7ec4\u4e2d\u79fb\u9664\u3002<\/p>\n<\/li>\n<li>\n<p>\u68c0\u67e5\u66f4\u6539\u662f\u5426\u89e3\u51b3\u4e86 PTR \u8bb0\u5f55\u95ee\u9898\u3002<\/p>\n<\/li>\n<\/ol>\n<p>\u60a8\u8fd8\u53ef\u80fd\u9700\u8981\uff1a<\/p>\n<ul>\n<li>\n<p>\u5728\u57df\u63a7\u5236\u5668\u4e0a\u7981\u7528\u6740\u6bd2\u8f6f\u4ef6\uff0c\u4ee5\u6392\u9664\u5e72\u6270\u56e0\u7d20\u3002<\/p>\n<\/li>\n<li>\n<p>\u786e\u4fdd\u52fe\u9009\u201c\u5220\u9664\u79df\u7ea6\u65f6\u4e22\u5f03 A \u548c PTR \u8bb0\u5f55\u201d\u590d\u9009\u6846\uff0c\u4ee5\u6709\u6548\u7ba1\u7406 DHCP \u79df\u7ea6\u3002<\/p>\n<\/li>\n<\/ul>\n<p>DNS \u66f4\u6539\u9700\u8981\u65f6\u95f4\u4f20\u64ad\u3002\u4e0b\u8868\u663e\u793a\u4e86\u5178\u578b\u7684\u4f20\u64ad\u65f6\u95f4\uff1a<\/p>\n<div fullwidth=\"\" class=\"qc-default-table-wrapper \">\n<table style=\"min-width: 50px;\">\n<colgroup>\n<col style=\"min-width: 25px;\">\n<col style=\"min-width: 25px;\"><\/colgroup>\n<tbody>\n<tr>\n<th colspan=\"1\" rowspan=\"1\">\n<p>DNS \u66f4\u6539\u7c7b\u578b<\/p>\n<\/th>\n<th colspan=\"1\" rowspan=\"1\">\n<p>\u5178\u578b\u4f20\u64ad\u65f6\u95f4<\/p>\n<\/th>\n<\/tr>\n<tr>\n<td colspan=\"1\" rowspan=\"1\">\n<p>PTR \u8bb0\u5f55<\/p>\n<\/td>\n<td colspan=\"1\" rowspan=\"1\">\n<p>\u51e0\u5206\u949f\u81f3 48 \u5c0f\u65f6<\/p>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<p>\u5728\u6d4b\u8bd5\u90ae\u4ef6\u6295\u9012\u4e4b\u524d\uff0c\u60a8\u5e94\u7b49\u5f85 DNS \u5b8c\u5168\u4f20\u64ad\u3002<\/p>\n<h3>\u6d4b\u8bd5\u90ae\u4ef6\u6295\u9012<\/h3>\n<p>\u66f4\u65b0 DNS \u548c PTR \u8bb0\u5f55\u540e\uff0c\u60a8\u9700\u8981\u6d4b\u8bd5\u90ae\u4ef6\u6295\u9012\u60c5\u51b5\u3002\u53ef\u4f7f\u7528\u4ee5\u4e0b\u65b9\u6cd5\uff1a<\/p>\n<ul>\n<li>\n<p>\u4f7f\u7528 Mailtrap Email Testing \u7b49\u5b89\u5168\u6d4b\u8bd5\u5de5\u5177\uff0c\u5728\u4e0d\u9a9a\u6270\u771f\u5b9e\u7528\u6237\u7684\u60c5\u51b5\u4e0b\u68c0\u67e5\u548c\u8c03\u8bd5\u90ae\u4ef6\u3002<\/p>\n<\/li>\n<li>\n<p>\u901a\u8fc7\u5206\u6790\u5783\u573e\u90ae\u4ef6\u62a5\u544a\u67e5\u770b\u9001\u8fbe\u7387\uff0c\u62a5\u544a\u4f1a\u63d0\u4f9b\u6574\u4f53\u5783\u573e\u8bc4\u5206\u548c\u8be6\u7ec6\u6d4b\u8bd5\u70b9\u3002<\/p>\n<\/li>\n<li>\n<p>\u5c06\u60a8\u7684 IP \u5730\u5740\u4e0e\u5e38\u89c1\u9ed1\u540d\u5355\u8fdb\u884c\u6bd4\u5bf9\uff0c\u4ee5\u8bc6\u522b\u53ef\u80fd\u5f71\u54cd\u6295\u9012\u7684\u95ee\u9898\u3002<\/p>\n<\/li>\n<\/ul>\n<p>\u5411 Gmail \u8d26\u6237\u53d1\u9001\u6d4b\u8bd5\u90ae\u4ef6\uff0c\u5e76\u76d1\u63a7\u662f\u5426\u51fa\u73b0\u9000\u4fe1\u6216\u8fdb\u5165\u5783\u573e\u90ae\u4ef6\u6587\u4ef6\u5939\u3002\u5982\u679c Gmail \u518d\u6b21\u62d2\u6536\u60a8\u7684\u90ae\u4ef6\uff0c\u8bf7\u91cd\u590d\u4e0a\u8ff0\u6b65\u9aa4\uff0c\u67e5\u627e\u5e76\u4fee\u590d\u5269\u4f59\u7684 DNS \u6216 PTR \u95ee\u9898\u3002<\/p>\n<blockquote>\n<p>\u63d0\u793a\uff1a\u5982\u679c\u60a8\u7684\u7ec4\u7ec7\u4f7f\u7528\u591a\u4e2a\u5916\u53d1 IP\uff0c\u8bf7\u5b9a\u671f\u76d1\u63a7\u6240\u6709 IP\u3002\u8fd9\u4e00\u505a\u6cd5\u6709\u52a9\u4e8e\u5728\u95ee\u9898\u5f71\u54cd\u90ae\u4ef6\u6295\u9012\u4e4b\u524d\u53ca\u65f6\u53d1\u73b0 DNS \u6216 PTR \u95ee\u9898\u3002<\/p>\n<\/blockquote>\n<h2>Gmail \u7684 PTR \u8bb0\u5f55\u57fa\u7840\u77e5\u8bc6<\/h2>\n<h3>\u4ec0\u4e48\u662f PTR \u8bb0\u5f55\uff1f<\/h3>\n<p>\u60a8\u53ef\u80fd\u4f1a\u60f3\u77e5\u9053 PTR \u8bb0\u5f55\u662f\u4ec0\u4e48\uff0c\u4ee5\u53ca\u5b83\u4e3a\u4f55\u5bf9\u90ae\u4ef6\u5982\u6b64\u91cd\u8981\u3002PTR \u8bb0\u5f55\uff08Pointer Record\uff09\u662f\u4e00\u79cd\u7279\u6b8a\u7684 DNS \u8bb0\u5f55\u7c7b\u578b\uff0c\u7528\u4e8e\u5c06 IP \u5730\u5740\u6620\u5c04\u5230\u57df\u540d\uff0c\u8fd9\u4e00\u8fc7\u7a0b\u79f0\u4e3a\u53cd\u5411 DNS \u67e5\u8be2\u3002\u5f53\u60a8\u53d1\u9001\u90ae\u4ef6\u65f6\uff0c\u63a5\u6536\u670d\u52a1\u5668\u4f1a\u4f7f\u7528 PTR \u8bb0\u5f55\u68c0\u67e5\u60a8\u7684 IP \u5730\u5740\u662f\u5426\u4e0e\u60a8\u58f0\u660e\u7684\u53d1\u9001\u57df\u540d\u5339\u914d\u3002\u8fd9\u4e00\u6b65\u6709\u52a9\u4e8e\u9a8c\u8bc1\u60a8\u7684\u8eab\u4efd\uff0c\u5e76\u4e0e\u5176\u4ed6\u90ae\u4ef6\u670d\u52a1\u5668\u5efa\u7acb\u4fe1\u4efb\u3002<\/p>\n<ul>\n<li>\n<p>PTR \u8bb0\u5f55\u7528\u4e8e\u9a8c\u8bc1\u53d1\u4ef6 IP \u662f\u5426\u4e0e\u58f0\u660e\u57df\u540d\u4e00\u81f4\u3002<\/p>\n<\/li>\n<li>\n<p>\u5b83\u652f\u6301\u53cd\u5411 DNS \u67e5\u8be2\uff0c\u5c06 IP \u5730\u5740\u8f6c\u6362\u4e3a\u57df\u540d\u3002<\/p>\n<\/li>\n<li>\n<p>\u5b83\u589e\u5f3a\u90ae\u4ef6\u5b89\u5168\u6027\uff0c\u4f7f\u653b\u51fb\u8005\u66f4\u96be\u4f2a\u9020\u5730\u5740\u3002<\/p>\n<\/li>\n<\/ul>\n<p>\u5982\u679c\u6ca1\u6709\u6b63\u786e\u7684 PTR \u8bb0\u5f55\uff0c\u60a8\u7684\u90ae\u4ef6\u53ef\u80fd\u65e0\u6cd5\u9001\u8fbe\u3002<\/p>\n<h3>\u4e3a\u4ec0\u4e48 Gmail \u8981\u6c42 PTR \u8bb0\u5f55<\/h3>\n<p>Gmail \u5c06 PTR \u8bb0\u5f55\u4f5c\u4e3a\u5b89\u5168\u68c0\u67e5\u7684\u91cd\u8981\u7ec4\u6210\u90e8\u5206\u3002\u60a8\u9700\u8981\u6709\u6548\u7684 PTR \u8bb0\u5f55\uff0c\u4ee5\u4fbf Gmail \u786e\u8ba4\u60a8\u7684\u4e3b\u673a\u540d\u4e0e\u53d1\u9001 IP \u5730\u5740\u4e00\u81f4\u3002\u8fd9\u4e2a\u8fc7\u7a0b\u79f0\u4e3a\u6b63\u5411\u786e\u8ba4\u53cd\u5411 DNS\uff08FCrDNS\uff09\uff0c\u6709\u52a9\u4e8e\u9632\u6b62\u90ae\u4ef6\u4f2a\u9020\u3002\u4efb\u4f55\u4eba\u90fd\u53ef\u4ee5\u521b\u5efa\u57df\u540d\uff0c\u4f46\u5e76\u975e\u6240\u6709\u4eba\u90fd\u80fd\u8bbe\u7f6e\u5339\u914d\u7684 PTR \u8bb0\u5f55\u3002Gmail \u5e0c\u671b\u770b\u5230\u60a8\u7684 PTR \u8bb0\u5f55\u5b58\u5728\uff0c\u5e76\u4e14\u80fd\u89e3\u6790\u56de\u60a8\u7684 IP \u5730\u5740\u3002\u8fd9\u4e00\u8981\u6c42\u53ef\u4ee5\u4fdd\u62a4\u7528\u6237\u514d\u53d7\u865a\u5047\u90ae\u4ef6\u4fb5\u5bb3\uff0c\u5e76\u51cf\u5c11\u5783\u573e\u90ae\u4ef6\u8fdb\u5165\u6536\u4ef6\u7bb1\u3002<\/p>\n<blockquote>\n<p>\u6ce8\u610f\uff1a\u5982\u679c\u60a8\u7684 PTR \u8bb0\u5f55\u4e0e\u53d1\u9001 IP \u4e0d\u5339\u914d\uff0cGmail \u4f1a\u62d2\u6536\u6216\u9650\u901f\u60a8\u7684\u90ae\u4ef6\u3002<\/p>\n<\/blockquote>\n<h3>PTR \u8bb0\u5f55\u5982\u4f55\u5f71\u54cd\u90ae\u4ef6<\/h3>\n<p>PTR \u8bb0\u5f55\u5728\u90ae\u4ef6\u9001\u8fbe\u7387\u4e2d\u8d77\u7740\u5173\u952e\u4f5c\u7528\u3002\u5982\u679c\u7f3a\u5c11 PTR \u8bb0\u5f55\u6216\u914d\u7f6e\u9519\u8bef\uff0c\u5c31\u4f1a\u4ea7\u751f\u95ee\u9898\u3002\u8bb8\u591a\u7528\u6237\u62a5\u544a\u79f0\uff0c\u7531\u4e8e PTR \u95ee\u9898\uff0c\u4ed6\u4eec\u53d1\u9001\u5230 Gmail \u7684\u90ae\u4ef6\u88ab\u963b\u6b62\u6216\u5ef6\u8fdf\u3002\u4e8b\u5b9e\u4e0a\uff0c\u7f3a\u5c11\u6216\u9519\u8bef\u7684 PTR \u8bb0\u5f55\u662f\u5927\u591a\u6570\u6295\u9012\u5931\u8d25\u7684\u539f\u56e0\u3002\u5f53 PTR \u8bb0\u5f55\u9519\u8bef\u65f6\uff0cGmail \u53ef\u80fd\u4f1a\u5c06\u90ae\u4ef6\u6807\u8bb0\u4e3a\u5783\u573e\u90ae\u4ef6\u6216\u76f4\u63a5\u62d2\u6536\u3002\u8fd9\u4f1a\u635f\u5bb3\u60a8\u7684\u53d1\u4ef6\u4eba\u4fe1\u8a89\uff0c\u751a\u81f3\u5bfc\u81f4\u88ab\u5217\u5165\u9ed1\u540d\u5355\u3002<\/p>\n<ul>\n<li>\n<p>\u53cd\u5411 DNS \u68c0\u67e5\u6709\u52a9\u4e8e\u8fc7\u6ee4\u5783\u573e\u90ae\u4ef6\u3002<\/p>\n<\/li>\n<li>\n<p>PTR \u8bb0\u5f55\u9519\u8bef\u4f1a\u5bfc\u81f4\u5408\u6cd5\u90ae\u4ef6\u88ab\u62d2\u6536\u3002<\/p>\n<\/li>\n<li>\n<p>\u51c6\u786e\u7684 PTR \u8bb0\u5f55\u53ef\u786e\u8ba4\u60a8\u7684\u8eab\u4efd\uff0c\u5e76\u63d0\u9ad8\u8fdb\u5165\u6536\u4ef6\u7bb1\u7684\u673a\u4f1a\u3002<\/p>\n<\/li>\n<\/ul>\n<p>\u60a8\u5e94\u59cb\u7ec8\u68c0\u67e5 PTR \u8bb0\u5f55\uff0c\u4ee5\u786e\u4fdd\u90ae\u4ef6\u6210\u529f\u6295\u9012\u7ed9 Gmail \u7528\u6237\u3002<\/p>\n<h2>\u90ae\u4ef6 DNS \u5339\u914d\u95ee\u9898<\/h2>\n<h3>\u6b63\u5411 DNS \u4e0e\u53cd\u5411 DNS<\/h3>\n<p>\u60a8\u9700\u8981\u4e86\u89e3\u6b63\u5411 DNS \u4e0e\u53cd\u5411 DNS \u7684\u533a\u522b\uff0c\u4ee5\u786e\u4fdd\u90ae\u4ef6\u987a\u7545\u6295\u9012\u3002\u6b63\u5411 DNS \u5c06\u57df\u540d\u89e3\u6790\u4e3a IP \u5730\u5740\uff1b\u53cd\u5411 DNS \u67e5\u8be2\u5219\u4ece IP \u5730\u5740\u67e5\u627e\u5bf9\u5e94\u57df\u540d\u3002\u4e24\u8005\u5728\u90ae\u4ef6\u6295\u9012\u4e2d\u90fd\u81f3\u5173\u91cd\u8981\u3002\u5982\u679c\u8bb0\u5f55\u4e0d\u5339\u914d\uff0cGmail \u53ef\u80fd\u4f1a\u963b\u6b62\u6216\u6807\u8bb0\u60a8\u7684\u90ae\u4ef6\u3002<\/p>\n<div fullwidth=\"\" class=\"qc-default-table-wrapper \">\n<table style=\"min-width: 75px;\">\n<colgroup>\n<col style=\"min-width: 25px;\">\n<col style=\"min-width: 25px;\">\n<col style=\"min-width: 25px;\"><\/colgroup>\n<tbody>\n<tr>\n<th colspan=\"1\" rowspan=\"1\">\n<p>\u5c5e\u6027<\/p>\n<\/th>\n<th colspan=\"1\" rowspan=\"1\">\n<p>\u6b63\u5411 DNS \u67e5\u8be2<\/p>\n<\/th>\n<th colspan=\"1\" rowspan=\"1\">\n<p>\u53cd\u5411 DNS \u67e5\u8be2<\/p>\n<\/th>\n<\/tr>\n<tr>\n<td colspan=\"1\" rowspan=\"1\">\n<p>\u4e3b\u8981\u76ee\u6807<\/p>\n<\/td>\n<td colspan=\"1\" rowspan=\"1\">\n<p>\u67e5\u627e\u4e0e\u57df\u540d\u5173\u8054\u7684 IP \u5730\u5740\u3002<\/p>\n<\/td>\n<td colspan=\"1\" rowspan=\"1\">\n<p>\u67e5\u627e\u4e0e IP \u5730\u5740\u5173\u8054\u7684\u57df\u540d\u3002<\/p>\n<\/td>\n<\/tr>\n<tr>\n<td colspan=\"1\" rowspan=\"1\">\n<p>\u8d77\u59cb\u70b9<\/p>\n<\/td>\n<td colspan=\"1\" rowspan=\"1\">\n<p>\u57df\u540d\uff08\u4f8b\u5982 truelist.io\uff09\u3002<\/p>\n<\/td>\n<td colspan=\"1\" rowspan=\"1\">\n<p>IP \u5730\u5740\uff08\u4f8b\u5982 8.8.4.4\uff09\u3002<\/p>\n<\/td>\n<\/tr>\n<tr>\n<td colspan=\"1\" rowspan=\"1\">\n<p>\u5e38\u89c1\u7528\u9014<\/p>\n<\/td>\n<td colspan=\"1\" rowspan=\"1\">\n<p>\u8bbf\u95ee\u7f51\u7ad9\u3001\u53d1\u9001\u90ae\u4ef6\u548c\u8fde\u63a5\u670d\u52a1\u3002<\/p>\n<\/td>\n<td colspan=\"1\" rowspan=\"1\">\n<p>\u90ae\u4ef6\u670d\u52a1\u5668\u9a8c\u8bc1\u3001\u5783\u573e\u90ae\u4ef6\u8fc7\u6ee4\u548c\u7f51\u7edc\u65e5\u5fd7\u8bb0\u5f55\u3002<\/p>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<p>\u53cd\u5411 DNS \u67e5\u8be2\u5931\u8d25\u662f\u90ae\u4ef6\u8fdb\u5165\u5783\u573e\u90ae\u7bb1\u7684\u4e3b\u8981\u539f\u56e0\u4e4b\u4e00\u3002\u6ca1\u6709\u6709\u6548\u7684 PTR \u8bb0\u5f55\uff0c\u63a5\u6536\u670d\u52a1\u5668\u65e0\u6cd5\u9a8c\u8bc1\u60a8\u7684\u8eab\u4efd\uff0c\u53ef\u80fd\u4f1a\u963b\u6b62\u60a8\u7684\u90ae\u4ef6\u3002<\/p>\n<h3>\u5e38\u89c1 DNS \u4e0d\u5339\u914d\u95ee\u9898<\/h3>\n<p>\u8bb8\u591a\u95ee\u9898\u53ef\u80fd\u5bfc\u81f4 Gmail \u62d2\u6536\u60a8\u7684\u90ae\u4ef6\u3002\u60a8\u53ef\u80fd\u4f7f\u7528 VPS \u5374\u5fd8\u8bb0\u66f4\u6539\u9ed8\u8ba4 PTR \u8bb0\u5f55\u3002\u6709\u65f6\u60a8\u66f4\u65b0\u4e86 DNS \u8bb0\u5f55\uff0c\u5374\u672a\u540c\u6b65\u66f4\u65b0\u90ae\u4ef6\u8f6f\u4ef6\u8bbe\u7f6e\u3002\u5982\u679c\u60a8\u5171\u4eab IP \u5730\u5740\uff0c\u670d\u52a1\u63d0\u4f9b\u5546\u53ef\u80fd\u5c06 PTR \u8bbe\u7f6e\u4e3a\u5176\u81ea\u8eab\u57df\u540d\uff0c\u800c\u975e\u60a8\u7684\u57df\u540d\u3002\u5982\u679c IP \u7531 ISP \u63a7\u5236\uff0c\u60a8\u53ef\u80fd\u6ca1\u6709\u6743\u9650\u4fee\u6539 PTR \u8bb0\u5f55\u3002\u5176\u4ed6\u5e38\u89c1\u95ee\u9898\u8fd8\u5305\u62ec SPF \u8bb0\u5f55\u5305\u542b\u8fc7\u591a DNS \u67e5\u8be2\u3001\u7f3a\u5c11 DKIM \u9009\u62e9\u5668\u6216 Return-Path \u4e0d\u4e00\u81f4\u3002<\/p>\n<blockquote>\n<p>\u63d0\u793a\uff1a\u6bcf\u6b21\u66f4\u6539\u90ae\u4ef6\u8bbe\u7f6e\u540e\uff0c\u8bf7\u68c0\u67e5 PTR\u3001SPF\u3001DKIM \u548c MX \u8bb0\u5f55\u3002<\/p>\n<\/blockquote>\n<h3>\u786e\u4fdd\u4e00\u81f4\u6027<\/h3>\n<p>\u60a8\u53ef\u4ee5\u901a\u8fc7\u4ee5\u4e0b\u6b65\u9aa4\u6392\u67e5\u5e76\u4fee\u590d DNS \u4e0d\u5339\u914d\u95ee\u9898\uff1a<\/p>\n<ol>\n<li>\n<p>\u4f7f\u7528 MXToolbox \u7b49\u5de5\u5177\u9a8c\u8bc1\u670d\u52a1\u5668 IP \u662f\u5426\u89e3\u6790\u5230\u60a8\u7684\u57df\u540d\u3002<\/p>\n<\/li>\n<li>\n<p>\u8054\u7cfb\u60a8\u7684 ISP \u6dfb\u52a0\u4e0e\u6b63\u5411 DNS A \u8bb0\u5f55\u5339\u914d\u7684 PTR \u8bb0\u5f55\u3002<\/p>\n<\/li>\n<li>\n<p>\u786e\u4fdd A \u8bb0\u5f55\u4e0e PTR \u8bb0\u5f55\u5b8c\u5168\u4e00\u81f4\uff0c\u4ee5\u907f\u514d\u6295\u9012\u95ee\u9898\u3002<\/p>\n<\/li>\n<li>\n<p>\u66f4\u65b0 MX \u8bb0\u5f55\uff0c\u4f7f\u5176\u4e0e\u60a8\u7684\u90ae\u4ef6\u6258\u7ba1\u670d\u52a1\u5546\u63d0\u4f9b\u7684\u503c\u4e00\u81f4\u3002<\/p>\n<\/li>\n<li>\n<p>\u6dfb\u52a0 SPF \u8bb0\u5f55\u4ee5\u5217\u51fa\u6388\u6743\u53d1\u4fe1\u6e90\u3002<\/p>\n<\/li>\n<li>\n<p>\u8bbe\u7f6e DKIM \u4ee5\u5bf9\u5916\u53d1\u90ae\u4ef6\u8fdb\u884c\u7b7e\u540d\u3002<\/p>\n<\/li>\n<li>\n<p>\u914d\u7f6e DMARC \u8bb0\u5f55\u4ee5\u76d1\u63a7\u8eab\u4efd\u9a8c\u8bc1\u60c5\u51b5\u3002<\/p>\n<\/li>\n<\/ol>\n<p>\u5efa\u8bae\u6bcf\u4e09\u5230\u516d\u4e2a\u6708\u68c0\u67e5\u4e00\u6b21 DNS \u8bb0\u5f55\uff0c\u5c24\u5176\u662f\u5728\u66f4\u6362\u5e73\u53f0\u6216\u6dfb\u52a0\u65b0\u670d\u52a1\u4e4b\u540e\u3002\u5b9a\u671f\u68c0\u67e5\u6709\u52a9\u4e8e\u9632\u6b62\u56e0\u53cd\u5411 DNS \u67e5\u8be2\u5931\u8d25\u800c\u88ab Gmail \u62d2\u6536\u90ae\u4ef6\u3002<\/p>\n<h2>Gmail PTR \u653f\u7b56\u4e0e\u9884\u9632\u63aa\u65bd<\/h2>\n<h3>Gmail \u7684 PTR \u8bb0\u5f55\u653f\u7b56<\/h3>\n<p>\u60a8\u5fc5\u987b\u4e86\u89e3 Gmail \u5bf9\u90ae\u4ef6\u53d1\u9001\u7684\u8981\u6c42\u3002Gmail \u8981\u6c42\u6bcf\u4e2a\u53d1\u9001\u670d\u52a1\u5668\u90fd\u5fc5\u987b\u62e5\u6709\u6709\u6548\u7684 PTR \u8bb0\u5f55\u3002\u6b64\u89c4\u5219\u6709\u52a9\u4e8e\u786e\u8ba4\u90ae\u4ef6\u670d\u52a1\u5668\u7684\u5408\u6cd5\u6027\u3002\u5982\u679c\u670d\u52a1\u5668\u7f3a\u5c11\u6b63\u786e\u7684 DNS \u8bbe\u7f6e\uff0cGmail \u53ef\u80fd\u4f1a\u963b\u6b62\u60a8\u7684\u90ae\u4ef6\u3002\u4e0b\u8868\u603b\u7ed3\u4e86\u4e3b\u8981\u8981\u6c42\uff1a<\/p>\n<div fullwidth=\"\" class=\"qc-default-table-wrapper \">\n<table style=\"min-width: 50px;\">\n<colgroup>\n<col style=\"min-width: 25px;\">\n<col style=\"min-width: 25px;\"><\/colgroup>\n<tbody>\n<tr>\n<th colspan=\"1\" rowspan=\"1\">\n<p>\u8981\u6c42<\/p>\n<\/th>\n<th colspan=\"1\" rowspan=\"1\">\n<p>\u8bf4\u660e<\/p>\n<\/th>\n<\/tr>\n<tr>\n<td colspan=\"1\" rowspan=\"1\">\n<p>\u6709\u6548\u7684 PTR \u8bb0\u5f55<\/p>\n<\/td>\n<td colspan=\"1\" rowspan=\"1\">\n<p>\u53d1\u9001\u57df\u540d\u548c\/\u6216 IP \u5fc5\u987b\u5177\u6709\u6709\u6548\u7684\u6b63\u5411\u548c\u53cd\u5411 DNS \u8bb0\u5f55\uff08PTR \u8bb0\u5f55\uff09\uff0c\u4ee5\u786e\u4fdd\u90ae\u4ef6\u5408\u6cd5\u6027\u3002<\/p>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<p>\u5982\u679c\u670d\u52a1\u5668\u4e0d\u7b26\u5408\u8fd9\u4e9b\u6807\u51c6\uff0c\u60a8\u53ef\u80fd\u4f1a\u770b\u5230\u9519\u8bef\u4ee3\u7801 550 5.7.25\u3002\u8be5\u4ee3\u7801\u8868\u793a Gmail \u56e0 IP \u6ca1\u6709\u6709\u6548 PTR \u8bb0\u5f55\u800c\u62d2\u6536\u90ae\u4ef6\u3002<\/p>\n<h3>PTR \u5931\u8d25\u5982\u4f55\u5bfc\u81f4\u62d2\u6536<\/h3>\n<p>Gmail \u4f7f\u7528 DNS \u68c0\u67e5\u6765\u4fdd\u62a4\u7528\u6237\u514d\u53d7\u5783\u573e\u90ae\u4ef6\u548c\u7f51\u7edc\u9493\u9c7c\u653b\u51fb\u3002\u5f53\u60a8\u53d1\u9001\u90ae\u4ef6\u65f6\uff0cGmail \u4f1a\u67e5\u627e\u4e0e\u53d1\u9001 IP \u5339\u914d\u7684 PTR \u8bb0\u5f55\u3002\u5982\u679c PTR \u8bb0\u5f55\u7f3a\u5931\u6216\u9519\u8bef\uff0cGmail \u65e0\u6cd5\u786e\u8ba4\u670d\u52a1\u5668\u8eab\u4efd\uff0c\u4ece\u800c\u5c06\u5176\u89c6\u4e3a\u53ef\u7591\u3002\u6b64\u65f6\uff0cGmail \u4f1a\u62d2\u6536\u90ae\u4ef6\u4ee5\u9632\u6b62\u6f5c\u5728\u6ee5\u7528\u3002\u53ef\u9760\u7684 DNS \u8bbe\u7f6e\u53ef\u8bc1\u660e\u670d\u52a1\u5668\u53ef\u4fe1\uff1b\u7f3a\u5931\u5219\u4f1a\u5bfc\u81f4\u90ae\u4ef6\u88ab\u62d2\u548c\u6295\u9012\u95ee\u9898\u3002<\/p>\n<h3>\u6301\u7eed\u76d1\u63a7\u6e05\u5355<\/h3>\n<p>\u901a\u8fc7\u5b9a\u671f\u76d1\u63a7 DNS \u8bb0\u5f55\uff0c\u60a8\u53ef\u4ee5\u9884\u9632\u5927\u591a\u6570\u4e0e PTR \u76f8\u5173\u7684\u95ee\u9898\u3002\u8bf7\u4f7f\u7528\u4ee5\u4e0b\u6e05\u5355\u4fdd\u6301\u90ae\u4ef6\u987a\u7545\u6295\u9012\uff1a<\/p>\n<ul>\n<li>\n<p>\u786e\u4fdd\u53d1\u9001 IP \u5b58\u5728 PTR \u8bb0\u5f55\u3002<\/p>\n<\/li>\n<li>\n<p>\u9a8c\u8bc1 PTR \u4e3b\u673a\u540d\u53ef\u89e3\u6790\u56de\u76f8\u540c IP\uff08\u6b63\u5411\u786e\u8ba4\u53cd\u5411 DNS\uff09\u3002<\/p>\n<\/li>\n<li>\n<p>\u68c0\u67e5\u4e3b\u673a\u540d\u662f\u5426\u4e0e\u53d1\u9001\u57df\u540d\u5339\u914d\u6216\u76f8\u5173\u3002<\/p>\n<\/li>\n<\/ul>\n<p>\u6301\u7eed\u76d1\u63a7\u53ef\u5e2e\u52a9\u60a8\u53ca\u65e9\u53d1\u73b0\u95ee\u9898\uff0c\u53ca\u65f6\u8c03\u6574\u8bbe\u7f6e\uff0c\u8c03\u67e5\u6839\u672c\u539f\u56e0\uff0c\u907f\u514d\u90ae\u4ef6\u88ab\u62d2\u3002\u4e3b\u52a8\u68c0\u67e5\u53ef\u4fdd\u6301\u826f\u597d\u7684\u53d1\u4ef6\u4eba\u4fe1\u8a89\uff0c\u5e76\u786e\u4fdd\u90ae\u4ef6\u6210\u529f\u9001\u8fbe\u6536\u4ef6\u7bb1\u3002<\/p>\n<blockquote>\n<p>\u63d0\u793a\uff1a\u8bbe\u7f6e\u65e5\u5386\u63d0\u9192\uff0c\u6bcf\u9694\u51e0\u4e2a\u6708\u68c0\u67e5\u4e00\u6b21 DNS \u548c PTR \u8bb0\u5f55\u3002\u8fd9\u4e2a\u4e60\u60ef\u6709\u52a9\u4e8e\u60a8\u63d0\u524d\u9884\u9632\u6f5c\u5728\u95ee\u9898\u3002<\/p>\n<\/blockquote>\n<div dividerstyle=\"solid\" size=\"large\" color=\"#D1D1D1\" class=\"qc-divider-wrapper\">\n<div class=\"qc-divider\" style=\"border-top-style: solid; width: 100%; border-top-color: rgb(209, 209, 209);\"><\/div>\n<\/div>\n<p>\u5f53 Gmail \u62d2\u6536\u60a8\u7684\u90ae\u4ef6\u65f6\uff0c\u60a8\u9700\u8981\u8fc5\u901f\u91c7\u53d6\u884c\u52a8\u3002\u9996\u5148\u68c0\u67e5 DNS \u548c PTR \u8bb0\u5f55\u3002\u6309\u7167\u4ee5\u4e0b\u6b65\u9aa4\u786e\u4fdd\u90ae\u4ef6\u7a33\u5b9a\u6295\u9012\uff1a<\/p>\n<ol>\n<li>\n<p>\u5c06 PTR \u8bb0\u5f55\u4e0e\u670d\u52a1\u5668\u4e3b\u673a\u540d\u5339\u914d\uff0c\u9632\u6b62\u90ae\u4ef6\u88ab\u6807\u8bb0\u4e3a\u5783\u573e\u90ae\u4ef6\u3002<\/p>\n<\/li>\n<li>\n<p>\u4f7f\u7528 <code>sudo hostnamectl set-hostname mail.example.com<\/code> \u8bbe\u7f6e\u670d\u52a1\u5668\u4e3b\u673a\u540d\u3002<\/p>\n<\/li>\n<li>\n<p>\u4f7f\u7528 <code>hostname<\/code> \u547d\u4ee4\u9a8c\u8bc1\u4e3b\u673a\u540d\u3002<\/p>\n<\/li>\n<li>\n<p>\u5982\u679c\u65e0\u6cd5\u81ea\u884c\u4fee\u6539\uff0c\u8bf7\u8054\u7cfb\u670d\u52a1\u63d0\u4f9b\u5546\u66f4\u65b0 PTR \u8bb0\u5f55\u3002<\/p>\n<\/li>\n<li>\n<p>\u4f7f\u7528 <code>dig -x 1.2.3.4 +short<\/code> \u68c0\u67e5\u5f53\u524d PTR \u8bb0\u5f55\u3002<\/p>\n<\/li>\n<\/ol>\n<p>\u8bf7\u5b9a\u671f\u76d1\u63a7 DNS \u548c PTR \u8bb0\u5f55\u3002\u8fd9\u4e00\u4e60\u60ef\u53ef\u5e2e\u52a9\u60a8\u907f\u514d Gmail \u62d2\u6536\u90ae\u4ef6\u7684\u95ee\u9898\u3002<\/p>\n<h2>\u5e38\u89c1\u95ee\u9898\uff08FAQ\uff09<\/h2>\n<h3>\u5982\u679c\u6211\u6ca1\u6709\u4e3a\u90ae\u4ef6\u670d\u52a1\u5668\u8bbe\u7f6e PTR \u8bb0\u5f55\uff0c\u4f1a\u53d1\u751f\u4ec0\u4e48\uff1f<\/h3>\n<p>Gmail \u53ef\u80fd\u4f1a\u62d2\u6536\u60a8\u7684\u90ae\u4ef6\u6216\u5c06\u5176\u5f52\u5165\u5783\u573e\u90ae\u7bb1\u3002\u60a8\u9700\u8981 PTR \u8bb0\u5f55\u6765\u8bc1\u660e\u670d\u52a1\u5668\u8eab\u4efd\uff0c\u5e2e\u52a9 Gmail \u4fe1\u4efb\u60a8\u7684\u90ae\u4ef6\u3002<\/p>\n<h3>\u5982\u4f55\u786e\u8ba4\u6211\u7684 PTR \u8bb0\u5f55\u662f\u5426\u6b63\u786e\uff1f<\/h3>\n<p>\u60a8\u53ef\u4ee5\u4f7f\u7528 MXToolbox \u7b49\u5de5\u5177\u6216 <code>nslookup<\/code> \u547d\u4ee4\u3002\u8f93\u5165 IP \u5730\u5740\uff0c\u68c0\u67e5\u7ed3\u679c\u662f\u5426\u4e0e\u60a8\u7684\u90ae\u4ef6\u670d\u52a1\u5668\u57df\u540d\u5339\u914d\u3002<\/p>\n<h3>\u6211\u53ef\u4ee5\u81ea\u5df1\u8bbe\u7f6e PTR \u8bb0\u5f55\u5417\uff1f<\/h3>\n<p>\u901a\u5e38\u60c5\u51b5\u4e0b\uff0c\u60a8\u65e0\u6cd5\u76f4\u63a5\u8bbe\u7f6e PTR \u8bb0\u5f55\u3002\u60a8\u9700\u8981\u8054\u7cfb\u670d\u52a1\u5668\u79df\u7528\u670d\u52a1\u5546\u6216 ISP\uff0c\u8bf7\u4ed6\u4eec\u4e3a\u60a8\u7684\u670d\u52a1\u5668 IP \u5730\u5740\u66f4\u65b0 PTR \u8bb0\u5f55\u3002<\/p>\n<h3>PTR \u8bb0\u5f55\u66f4\u6539\u9700\u8981\u591a\u4e45\u624d\u80fd\u751f\u6548\uff1f<\/h3>\n<p>DNS \u66f4\u6539\uff08\u5305\u62ec PTR \u8bb0\u5f55\uff09\u5728\u5168\u7403\u8303\u56f4\u5185\u4f20\u64ad\u53ef\u80fd\u9700\u8981\u51e0\u5206\u949f\u5230 48 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