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回 1楼魔咒626的帖子 root@chao1gu ~]# service postfix status -l Redirecting to /bin/systemctl status  -l postfix.service ● postfix.service - Postfix Mail Transport Agent    Loaded: loaded (/usr/lib/systemd/system/postfix.service; enabled; vendor preset: disabled)    Active: active (running) since Fri 2017-06-16 11:20:16 CST; 7min ago Main PID: 745 (master)    CGroup: /system.slice/postfix.service            ├─ 745 /usr/libexec/postfix/master -w            ├─ 746 pickup -l -t unix -u            ├─ 747 qmgr -l -t unix -u            ├─2126 smtp -t unix -u            ├─2147 showq -t unix -u            ├─2152 cleanup -z -t unix -u            ├─2153 trivial-rewrite -n rewrite -t unix -u            ├─2154 smtp -t unix -u            └─2156 bounce -z -n defer -t unix -u Jun 16 11:25:46   postfix/smtp[2126]: connect to 126mx02.mxmail.netease.com[220.181.15.153]:25: Connection timed out Jun 16 11:26:16 c  postfix/smtp[2126]: connect to 126mx03.mxmail.netease.com[220.181.15.192]:25: Connection timed out Jun 16 11:26:46 c  postfix/smtp[2126]: connect to 126mx02.mxmail.netease.com[220.181.15.152]:25: Connection timed out Jun 16 11:27:16 c  postfix/smtp[2126]: connect to 126mx01.mxmail.netease.com[220.181.15.138]:25: Connection timed out Jun 16 11:27:17 c  postfix/pickup[746]: A862A62258: uid=0 from= Jun 16 11:27:17 c  postfix/cleanup[2152]: A862A62258: message-id= Jun 16 11:27:17 c  postfix/qmgr[747]: A862A62258: from=, size=28352, nrcpt=1 (queue active) Jun 16 11:27:46 c  postfix/smtp[2126]: connect to 126mx01.mxmail.netease.com[220.181.15.136]:25: Connection timed out Jun 16 11:27:46 c  postfix/smtp[2126]: 447016223C: to=, relay=none, delay=1427, delays=1277/0.01/150/0, dsn=4.4.1, status=deferred (connect to 126mx01.mxmail.netease.com[220.181.15.136]:25: Connection timed out) Jun 16 11:27:47 chao1gu.com postfix/smtp[2154]: connect to mx3.qq.com[183.57.48.35]:25: Connection timed out ------------------------- Recentos7.3不能发邮件postfixHost or domain name not found. 域名解析过了的