云服务器：谷歌云-日本 Centos7（已开启所有端口出入）
本域邮件可以发送，也可以秒收
外域邮件发送不了，但可以接收（20分钟左右才能收到）注：外域垃圾箱也没有收到邮件
想先解决发信问题，以下是日志
[root@mx ~]# cat /var/log/maillog

Oct 22 16:39:06 instance-2 postfix/submission/smtpd[9109]: connect from localhost[127.0.0.1]
Oct 22 16:39:06 instance-2 postfix/submission/smtpd[9109]: Anonymous TLS connection established from localhost[127.0.0.1]: TLSv1 with cipher ECDHE-RSA-AES256-SHA (256/256 bits)
Oct 22 16:39:06 instance-2 postfix/submission/smtpd[9109]: EAC47F4AAB: client=localhost[127.0.0.1], sasl_method=LOGIN, sasl_username=postmaster@sf12333.com
Oct 22 16:39:07 instance-2 postfix/cleanup[9116]: EAC47F4AAB: message-id=<d4ba4873aef90527b94547b74b5af8af@sf12333.com>
Oct 22 16:39:07 instance-2 postfix/qmgr[1518]: EAC47F4AAB: from=<postmaster@sf12333.com>, size=1035, nrcpt=1 (queue active)
Oct 22 16:39:07 instance-2 roundcube: <rv80ne36> User postmaster@sf12333.com [23.105.198.159]; Message for 270494398@qq.com; 250: 2.0.0 Ok: queued as EAC47F4AAB
Oct 22 16:39:07 instance-2 postfix/submission/smtpd[9109]: disconnect from localhost[127.0.0.1]
Oct 22 16:39:08 instance-2 postfix/10025/smtpd[9129]: connect from localhost[127.0.0.1]
Oct 22 16:39:08 instance-2 postfix/10025/smtpd[9129]: 780B6F4B4C: client=localhost[127.0.0.1]
Oct 22 16:39:08 instance-2 postfix/cleanup[9116]: 780B6F4B4C: message-id=<d4ba4873aef90527b94547b74b5af8af@sf12333.com>
Oct 22 16:39:08 instance-2 postfix/qmgr[1518]: 780B6F4B4C: from=<postmaster@sf12333.com>, size=2092, nrcpt=1 (queue active)
Oct 22 16:39:08 instance-2 postfix/10025/smtpd[9129]: disconnect from localhost[127.0.0.1]
Oct 22 16:39:08 instance-2 amavis[1768]: (01768-04) Passed CLEAN {RelayedInternal}, ORIGINATING/MYNETS LOCAL [127.0.0.1]:45746 <postmaster@sf12333.com> -> <270494398@qq.com>, Queue-ID: EAC47F4AAB, Message-ID: <d4ba4873aef90527b94547b74b5af8af@sf12333.com>, mail_id: CfRE8mh3vTNd, Hits: 0.214, size: 1059, queued_as: 780B6F4B4C, dkim_new=dkim:sf12333.com, 1476 ms, Tests: [ALL_TRUSTED=-1,HTML_MESSAGE=0.001,TVD_RCVD_SINGLE=1.213]
Oct 22 16:39:08 instance-2 amavis[1768]: (01768-04) Passed CLEAN, <postmaster@sf12333.com> -> <270494398@qq.com>, Hits: 0.214, tag=2, tag2=6.2, kill=6.9, queued_as: 780B6F4B4C, L/0/0/0
Oct 22 16:39:08 instance-2 postfix/amavis/smtp[9121]: EAC47F4AAB: to=<270494398@qq.com>, relay=127.0.0.1[127.0.0.1]:10026, delay=1.6, delays=0.06/0.02/0/1.5, dsn=2.0.0, status=sent (250 2.0.0 from MTA(smtp:[127.0.0.1]:10025): 250 2.0.0 Ok: queued as 780B6F4B4C)
Oct 22 16:39:08 instance-2 postfix/qmgr[1518]: EAC47F4AAB: removed
Oct 22 16:39:21 instance-2 postfix/anvil[9005]: statistics: max connection rate 1/60s for (smtpd:184.105.206.27) at Oct 22 16:36:00
Oct 22 16:39:21 instance-2 postfix/anvil[9005]: statistics: max connection count 1 for (smtpd:184.105.206.27) at Oct 22 16:36:00
Oct 22 16:39:21 instance-2 postfix/anvil[9005]: statistics: max cache size 1 at Oct 22 16:36:00
[root@mx ~]#