I will chime in and add my US$0.02. I'm very happy with the AOL error message scheme--it's readable and it makes sense. Either a user is not known or the user's mailbox is full. None of this potentially-confusing "Cannot write to [USER.MAIL]MAIL.MAI" or "Unknown Mailer Error 1" or "Disk extend failed writing to blah de blah de blah." And yes, you can set a full mailbox user to nomail and delete an unknown user. David, Eric should be able to send you the info on the LISTSERV/LMail autodelete formatting if he hasn't already. I'm sure many list owners would shout "Halleluyah!" if a major Internet player was formatting its error messages in such a way...:) Nathan