Does anyone know why users would still receive the administrator email notification that they are over their limit when there is no limit set on the exchange server?

Is it set excplicitly on their mailbox or on the mailbox store? Having no limits at all is not a good idea.

mailbox store

What is set on the mailbox store? No limits? If so, check the mailbox itself. Any set there?

Hi, Please check the below settings: How to set size limits for messages in Exchange Server 2003: http://support.microsoft.com/kb/322679 http://www.msexchange.org/tutorials/Set-Size-Limits-Messages.html Restarting the Microsoft Exchange Information Store service causes the configured limits to take effect immediately. Thanks, RichardYour expertise never fails to impress :)