dovecot quota-warning detection mail

[森川 孝司]

Hi Gedalya-san

I would like to set "auth_default_realm = example.co.jp".

I'm just replacing from older server to new server,
Older servers also had this problem.

So, we decided to proceed with server replacement in this state.
As another task, we will start and set up this issue.

Therefore, it takes time to set and confirm.
If we can confirm it, we will report it again.

Thank you.