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- iRedMail 版本号：
- 使用哪个数据库存储用户帐号（OpenLDAP，MySQL，PostgreSQL）：
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==== ==== 必填信息。没有填写将不予回复 ====
- iRedMail 版本号：0.9.5-1
- 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：CentOS 7
- 与您的问题相关的日志信息： 点击发送后，显示发送成功，但是对方没有收到邮件
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/var/logs/maillog 日志信息如下，麻烦老师们看看是什么原因呢？ 关闭IPV6 模块有影响吗？

[BEGIN] 2016-05-20 8:26:43
May 20 08:09:15 mail roundcube: PHP Warning:  syslog() has been disabled for security reasons in /var/www/roundcubemail-1.1.5/program/lib/Roundcube/rcube.php on line 1303
May 20 08:09:36 mail postfix/flush[54544]: warning: inet_protocols: disabling IPv6 name/address support: Address family not supported by protocol
May 20 08:09:41 mail postfix/scache[54041]: statistics: start interval May 20 08:06:21
May 20 08:09:41 mail postfix/scache[54041]: statistics: domain lookup hits=0 miss=1 success=0%
May 20 08:09:41 mail postfix/scache[54041]: statistics: address lookup hits=0 miss=1 success=0%
May 20 08:10:38 mail postfix/smtpd[54723]: warning: inet_protocols: disabling IPv6 name/address support: Address family not supported by protocol
May 20 08:10:38 mail postfix/submission/smtpd[54723]: connect from localhost[127.0.0.1]
May 20 08:10:38 mail postfix/submission/smtpd[54723]: Anonymous TLS connection established from localhost[127.0.0.1]: TLSv1 with cipher ECDHE-RSA-AES256-SHA (256/256 bits)
May 20 08:10:38 mail postfix/trivial-rewrite[54730]: warning: inet_protocols: disabling IPv6 name/address support: Address family not supported by protocol
May 20 08:10:38 mail postfix/cleanup[54738]: warning: inet_protocols: disabling IPv6 name/address support: Address family not supported by protocol
May 20 08:10:38 mail postfix/submission/smtpd[54723]: 749E6114A6: client=localhost[127.0.0.1], sasl_method=LOGIN, sasl_username=shmily@qh.cn
May 20 08:10:38 mail postfix/cleanup[54738]: 749E6114A6: message-id=<488882c2aa0fff21da3b1b1eed0aca8d@127.0.0.1>
May 20 08:10:38 mail postfix/qmgr[2193]: 749E6114A6: from=<shmily@qh.cn>, size=561074, nrcpt=1 (queue active)
May 20 08:10:38 mail roundcube: PHP Warning:  syslog() has been disabled for security reasons in /var/www/roundcubemail-1.1.5/program/lib/Roundcube/rcube.php on line 1303
May 20 08:10:38 mail postfix/smtp[54745]: warning: inet_protocols: disabling IPv6 name/address support: Address family not supported by protocol
May 20 08:10:38 mail postfix/smtp[54745]: connect to 127.0.0.1[127.0.0.1]:10026: Connection refused
May 20 08:10:38 mail postfix/bounce[54749]: warning: inet_protocols: disabling IPv6 name/address support: Address family not supported by protocol
ction refused)
May 20 08:10:38 mail postfix/submission/smtpd[54723]: disconnect from localhost[127.0.0.1]

May 20 08:16:21 mail postfix/qmgr[2193]: 749E6114A6: from=<shmily@qh.cn>, size=561074, nrcpt=1 (queue active)
May 20 08:16:21 mail postfix/qmgr[2193]: B092410218: from=<rongyanjun@qh.cn>, size=605, nrcpt=1 (queue active)
May 20 08:16:21 mail postfix/qmgr[2193]: C3FD6114A1: from=<root@mail.server>, size=831, nrcpt=1 (queue active)
May 20 08:16:21 mail postfix/qmgr[2193]: 16CF4114A4: from=<root@mail.server>, size=831, nrcpt=1 (queue active)
May 20 08:16:21 mail postfix/qmgr[2193]: A6786114A0: from=<root@mail.server>, size=830, nrcpt=1 (queue active)
May 20 08:16:21 mail postfix/qmgr[2193]: E6BA9114A3: from=<root@mail.server>, size=795, nrcpt=1 (queue active)
May 20 08:16:21 mail postfix/qmgr[2193]: 25B1E114A5: from=<root@mail.server>, size=830, nrcpt=1 (queue active)
May 20 08:16:21 mail postfix/smtp[55828]: warning: inet_protocols: disabling IPv6 name/address support: Address family not supported by protocol
May 20 08:16:21 mail postfix/proxymap[55831]: warning: inet_protocols: disabling IPv6 name/address support: Address family not supported by protocol
May 20 08:16:21 mail postfix/smtp[55828]: connect to 127.0.0.1[127.0.0.1]:10026: Connection refused
May 20 08:16:21 mail postfix/bounce[55835]: warning: inet_protocols: disabling IPv6 name/address support: Address family not supported by protocol
ion refused)
May 20 08:16:21 mail postfix/smtp[55828]: connect to 127.0.0.1[127.0.0.1]:10026: Connection refused
May 20 08:16:21 mail postfix/smtp[55834]: warning: inet_protocols: disabling IPv6 name/address support: Address family not supported by protocol
tion refused)
May 20 08:16:21 mail postfix/smtp[55828]: connect to 127.0.0.1[127.0.0.1]:10024: Connection refused
refused)
May 20 08:16:21 mail postfix/smtp[55834]: connect to 127.0.0.1[127.0.0.1]:10024: Connection refused
fused)
May 20 08:16:21 mail postfix/flush[55841]: warning: inet_protocols: disabling IPv6 name/address support: Address family not supported by protocol
May 20 08:16:21 mail postfix/flush[55844]: warning: inet_protocols: disabling IPv6 name/address support: Address family not supported by protocol
May 20 08:16:21 mail postfix/scache[55845]: warning: inet_protocols: disabling IPv6 name/address support: Address family not supported by protocol
May 20 08:16:21 mail postfix/smtp[55834]: connect to 127.0.0.1[127.0.0.1]:10024: Connection refused
May 20 08:16:21 mail postfix/smtp[55828]: connect to 127.0.0.1[127.0.0.1]:10024: Connection refused
refused)
on refused)
May 20 08:16:21 mail postfix/bounce[55850]: warning: inet_protocols: disabling IPv6 name/address support: Address family not supported by protocol
May 20 08:16:21 mail postfix/error[55853]: warning: inet_protocols: disabling IPv6 name/address support: Address family not supported by protocol
1[127.0.0.1]:10024: Connection refused)