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postfix 發(fā)送郵件問題 Connection timed out

發(fā)送成功但是收不到郵件!日志文件如下,

Mar 23 11:18:07 VM_175_210_centos postfix/pickup[28551]: 6F8A174556: uid=0 from=<root>
Mar 23 11:18:07 VM_175_210_centos postfix/cleanup[32639]: 6F8A174556: message-id=<20180323031807.6F8A174556@example.com>
Mar 23 11:18:07 VM_175_210_centos postfix/qmgr[28550]: 6F8A174556: from=<root@example.com>, size=439, nrcpt=1 (queue active)
Mar 23 11:18:29 VM_175_210_centos postfix/smtp[32456]: connect to mx1.qq.com[183.57.48.35]:25: Connection timed out
Mar 23 11:18:29 VM_175_210_centos postfix/smtp[32456]: 792877454A: to=<491126240@qq.com>, relay=none, delay=2579, delays=2459/0.25/120/0, dsn=4.4.1, status=deferred (connect to mx1.qq.com[183.57.48.35]:25: Connection timed out)
Mar 23 11:18:37 VM_175_210_centos postfix/smtp[32640]: connect to mxbiz1.qq.com[163.177.89.176]:25: Connection timed out
Mar 23 11:19:07 VM_175_210_centos postfix/smtp[32640]: connect to mxbiz1.qq.com[112.90.78.144]:25: Connection timed out
Mar 23 11:19:38 VM_175_210_centos postfix/smtp[32640]: connect to mxbiz2.qq.com[112.90.78.144]:25: Connection timed out

有大神指點一下嗎

回答
編輯回答
選擇

在自己的服務(wù)器上telnet一下郵件服務(wù)器的端口是否能通。
或者參考一下here

2017年9月18日 10:45