腾讯服务器 - iredmail - 安装问题 - python web.py
环境：腾讯云香港机，iredmail 1.3.1，centos7
问题：iredmail安装完成后，在浏览器里访问 iredadmin 提示 Internal Server Error 出错。
过程：查看 /var/log/message 内容，
Jul 22 13:35:30 mail uwsgi: *** Operational MODE: preforking ***
Jul 22 13:35:30 mail uwsgi: Traceback (most recent call last):
Jul 22 13:35:30 mail uwsgi: File "iredadmin.py", line 9, in <module>
Jul 22 13:35:30 mail uwsgi:
Jul 22 13:35:30 mail uwsgi: from libs import iredbase
Jul 22 13:35:30 mail uwsgi: File "/opt/www/iRedAdmin-1.0/libs/iredbase.py", line 7, in <module>
Jul 22 13:35:30 mail uwsgi:
Jul 22 13:35:30 mail uwsgi: import web
Jul 22 13:35:30 mail uwsgi: ImportError
Jul 22 13:35:30 mail uwsgi: :
Jul 22 13:35:30 mail uwsgi: No module named web
Jul 22 13:35:30 mail uwsgi:
Jul 22 13:35:30 mail uwsgi: unable to load app 0 (mountpoint='') (callable not found or import error)
Jul 22 13:35:30 mail uwsgi: *** no app loaded. going in full dynamic mode ***回查安装过程中，有相关的错误提示内容：
Complete!
[ INFO ] Installing required Python-3 modules with pip3: web.py>=0.51 web.py>=0.51
WARNING: Running pip install with root privileges is generally not a good idea. Try `pip3 install --user` instead.
Collecting web.py>=0.51
The repository located at mirrors.tencentyun.com is not a trusted or secure host and is being ignored. If this repository is available via HTTPS it is recommended to use HTTPS instead, otherwise you may silence this warning and allow it anyways with '--trusted-host mirrors.tencentyun.com'.
Could not find a version that satisfies the requirement web.py>=0.51 (from versions: )
No matching distribution found for web.py>=0.51
[ INFO ] Installing required Python-2 modules with pip2: web.py>=0.51 more-itertools==5.0.0 web.py>=0.51 more-itertools==5.0.0
Collecting web.py>=0.51
The repository located at mirrors.tencentyun.com is not a trusted or secure host and is being ignored. If this repository is available via HTTPS it is recommended to use HTTPS instead, otherwise you may silence this warning and allow it anyways with '--trusted-host mirrors.tencentyun.com'.
Could not find a version that satisfies the requirement web.py>=0.51 (from versions: )
No matching distribution found for web.py>=0.51
You are using pip version 8.1.2, however version 20.1.1 is available.
You should consider upgrading via the 'pip install --upgrade pip' command.那么可尝试手工安装python的相关包，pip3 install web.py>=0.51pip2 install web.py>=0.51 more-itertools==5.0.0
然后再重启相应服务（iredamin和iredpad等），或重启系统后测试，可以正常登录到iredadmin进行管理了。
参考：https://forum.iredmail.org/topic17082-internal-server-error-iredadmin.html