didn't change anything in dovecot.conf. There had been some good odd 116 email log messages but the size of this email box was kept to 100MB via iredadmin. I deleted most of it. Lets wait for a bit more. May be the 116 email messages were comprising of 85% at that time.
How frequently does dovecot reminds of email quota ?
If it comes one more time then there might be some serious issue.
