Topic: Mailbox Quota Warning: 95% Full.
Similar to the Quota excess issue. I have the similar issue as the user receive alert message. And it may due to the maildirsize not update when changing the quota size. I think the problem can be solve after some little enhancement. e.g. If the quota update, delete user's maildirsize.
Subject: Mailbox Quota Warning: 95% Full.
Your mailbox is now 95% full, please clean up some mails for
further incoming mails.