==== ==== ==== ==== ==== 必填信息。没有填写将不予回复 ====
- iRedMail 版本号：iRedMail-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：centos 6
- 与您的问题相关的日志信息：
测试环境
       vm 12
       centos 6
iredmail服务器的设置
       主机名：danismail.example.com
       ip 地址：192.168.16.197
       selinux：disabled
     
在本机火狐浏览器上打开网页显示
无法连接

Firefox 无法建立到 danismail.example.com 服务器的连接。

    此站点暂时不可用或者太忙。请稍后再试。
    如果您无法载入任何页面，请检查您计算机的网络连接。
    如果您的计算机或网络受到防火墙或者代理服务器的保护，请确认 Firefox 已被授权访问网络。

var/log/nginx/error.log显示如下
2017/08/02 10:03:00 [emerg] 2688#2688: bind() to 0.0.0.0:80 failed (98: Address already in use)
2017/08/02 10:03:00 [emerg] 2688#2688: bind() to 0.0.0.0:80 failed (98: Address already in use)
2017/08/02 10:03:00 [emerg] 2688#2688: bind() to 0.0.0.0:80 failed (98: Address already in use)
2017/08/02 10:03:00 [emerg] 2688#2688: bind() to 0.0.0.0:80 failed (98: Address already in use)
2017/08/02 10:03:00 [emerg] 2688#2688: bind() to 0.0.0.0:80 failed (98: Address already in use)
2017/08/02 10:03:00 [emerg] 2688#2688: still could not bind()
2017/08/02 10:48:04 [emerg] 2646#2646: bind() to 0.0.0.0:80 failed (98: Address already in use)
2017/08/02 10:48:04 [emerg] 2646#2646: bind() to 0.0.0.0:80 failed (98: Address already in use)
2017/08/02 10:48:04 [emerg] 2646#2646: bind() to 0.0.0.0:80 failed (98: Address already in use)
2017/08/02 10:48:04 [emerg] 2646#2646: bind() to 0.0.0.0:80 failed (98: Address already in use)
2017/08/02 10:48:04 [emerg] 2646#2646: bind() to 0.0.0.0:80 failed (98: Address already in use)
2017/08/02 10:48:04 [emerg] 2646#2646: still could not bind()

var/log/httpd/error.log显示如下
[Wed Aug 02 10:03:00 2017] [notice] suEXEC mechanism enabled (wrapper: /usr/sbin/suexec)
[Wed Aug 02 10:03:00 2017] [notice] Digest: generating secret for digest authentication ...
[Wed Aug 02 10:03:00 2017] [notice] Digest: done
[Wed Aug 02 10:03:00 2017] [notice] Apache/2.2.15 (Unix) DAV/2 configured -- resuming normal operations
[Wed Aug 02 10:03:00 2017] [warn] ./mod_dnssd.c: No services found to register
[Wed Aug 02 10:47:12 2017] [notice] caught SIGTERM, shutting down
[Wed Aug 02 10:48:03 2017] [notice] suEXEC mechanism enabled (wrapper: /usr/sbin/suexec)
[Wed Aug 02 10:48:03 2017] [notice] Digest: generating secret for digest authentication ...
[Wed Aug 02 10:48:03 2017] [notice] Digest: done
[Wed Aug 02 10:48:03 2017] [notice] Apache/2.2.15 (Unix) DAV/2 configured -- resuming normal operations
[Wed Aug 02 10:48:03 2017] [warn] ./mod_dnssd.c: No services found to register