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- iRedMail 版本号： 0.9.7
- 使用哪个数据库存储用户帐号（OpenLDAP，MySQL，PostgreSQL）：MySQL
- 使用的 Linux/BSD 发行版名称及版本号： Centos7.3
- 与您的问题相关的日志信息：

Aug 30 20:20:56 mx postfix/10025/smtpd[13478]: connect from mx.moovpay.com[127.0.0.1]
Aug 30 20:20:56 mx postfix/10025/smtpd[13478]: 72C7830004ACE: client=mx.moovpay.com[127.0.0.1]
Aug 30 20:20:56 mx postfix/cleanup[13456]: 72C7830004ACE: message-id=<f84f9daa09290d392c9edd14d706f687@moovpay.com>
Aug 30 20:20:56 mx postfix/qmgr[8964]: 72C7830004ACE: from=<minyan@moovpay.com>, size=1563, nrcpt=1 (queue active)
Aug 30 20:20:56 mx postfix/10025/smtpd[13478]: disconnect from mx.moovpay.com[127.0.0.1]
Aug 30 20:20:56 mx amavis[3072]: (03072-01) Passed CLEAN {RelayedInternal}, ORIGINATING/MYNETS LOCAL [127.0.0.1]:47894 <minyan@moovpay.com> -> <larrysg@qq.com>, Queue-ID: 3AC9C30004AC1, Message-ID: <f84f9daa09290d392c9edd14d706f687@moovpay.com>, mail_id: wHNY4esaI9mr, Hits: 0.214, size: 512, queued_as: 72C7830004ACE, dkim_new=dkim:moovpay.com, 1180 ms, Tests: [ALL_TRUSTED=-1,TVD_RCVD_SINGLE=1.213,TVD_SPACE_RATIO=0.001]
Aug 30 20:20:56 mx postfix/amavis/smtp[13461]: 3AC9C30004AC1: to=<larrysg@qq.com>, relay=127.0.0.1[127.0.0.1]:10026, delay=1.4, delays=0.23/0.01/0.01/1.2, 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 72C7830004ACE)
Aug 30 20:20:56 mx postfix/qmgr[8964]: 3AC9C30004AC1: removed
Aug 30 20:20:56 mx postfix/smtp[13479]: connect to mx3.qq.com[2001:df6:f400::2808]:25: Network is unreachable
Aug 30 20:20:57 mx postfix/smtp[13479]: Untrusted TLS connection established to mx3.qq.com[103.7.30.40]:25: TLSv1.2 with cipher AES128-SHA256 (128/128 bits)
Aug 30 20:20:57 mx postfix/smtp[13479]: 72C7830004ACE: to=<larrysg@qq.com>, relay=mx3.qq.com[103.7.30.40]:25, delay=1.5, delays=0/0.02/0.67/0.78, dsn=2.0.0, status=sent (250 Ok: queued as )
Aug 30 20:20:57 mx postfix/qmgr[8964]: 72C7830004ACE: removed
Aug 30 20:30:55 mx clamd[1354]: SelfCheck: Database status OK.

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可以发邮件，收不到外网邮件，外网邮箱也没有退信。日志也没有显示错误。