Michael: > however with Amavis enabled the above message does not turn up in the > sender's > email box, thus they have no way of knowing the recipient's mailbox is full.
Then your mail configuration is broken, and I refer you to the mailing list welcome message below for instructions. Wietse TO REPORT A PROBLEM see http://www.postfix.org/DEBUG_README.html#mail TO (UN)SUBSCRIBE see http://www.postfix.org/lists.html Thank you for using Postfix. Welcome to the postfix-users mailing list. This list is for questions and discussions concerning the installation, configuration and operation of the Postfix mail system.