On Wed, 17 Mar 1999 16:26:44 -0500, Glenn A. Malling <[log in to unmask]> wrote: >[log in to unmask] said: > >> When there is a permanent mail delivery failure (ie no user, no >> domain, etc) for a user confirmation mail (ie asking them to confirm a >> subscription, for example -- this seems to be the only type), the >> message is bounced to the POSTMASTER of the RELAY (sendmail) machine. > >That's because you have sendmail configured to forward double bounces >to the local postmaster. But this is not a "double bounce". Its a single bounce. The relay machine can't deliver the mail, so it should send a message to the sender, which is [log in to unmask] (not the real domain name). >The SMTP statement MAIL FROM:<> means "don't send me an error message >if you can not deliver this." Some believe that its use is restricted >to error messages but a careful reading of RFC821 will show that that >is not true. Its use in sending an error message is given as an >example of where it could be used. Some have taken that single example >as an exclusionary statement, I don't think it is. So, you are sure that confirmation request emails are sent with a null From header? I have not confirmed this. I don't really care what the RFC says -- I just don't want to get the bounces. If I were not using the mail relay, these permanent failure notices would go to the user specified in the POSTMASTER field in go.user -- but this doesn't happen when using the relay and this doesn't seem to make any sense to me. If listserv sends mail to a non-existent user, the failure notice mail should go back to listserv-defined POSTMASTER, not to the postmaster of the relay.. (that is to say, this is the behavior I want and would expect, even if its not the way its configured to work by default). -Gabe