I just got a mysterious error message (ok, it's one that I haven't seen before and may not be mysterious to anyone else). My list is set up with a confirm and I have a member that has been on the list for a couple of weeks and I just got a couple of error messages today that said the following: >--> Error description: >Error-For: XX@XX >Error-Code: 3 >Error-Text: User unknown: Not a typewriter > >Error-End: One error reported. > > > ----- Transcript of session follows ----- >550 <XX@XX>... User unknown: Not a typewriter Anyone know what this particular error message means? I'm curious (and somewhat amused). Thanks, Tea