Larry Stone: > On 9/26/10 6:59 PM, Stefan Monnier at monn...@iro.umontreal.ca wrote: > > >> If the mail cannot be returned to the return address, it is for all > >> practical purposes discarded. > > > > That describes the behavior I see, but in the case where the mail > > originates locally, this behavior is clearly suboptimal: When the origin > > of the message is /usr/sbin/sendmail, it doesn't seem completely > > far-fetched to consider that the return-address is a local file. > ... > > Otherwise, some (potentially very minor or temporary) config problem can > > result in throwing away very valuable, carefully crafted messages, with > > no way to recover them, even if the misconfiguration is detected > > very quickly. > > Then the sender should save a copy. I do that the same as I make copies of > important documents before sending them off in snail mail.
Postfix has an option to send non-deliverable bounces to the postmaster. /etc/postfix/main.cf: notify_classes = 2bounce ... This is not on by default, because it requires that someone actually pays attention to Postmaster mail. Otherwise, uncontrolled amounts of mail would accumulate and bring poorly-monitored mail systems down. It is no longer safe to assume that every Postfix sysadmin reviews their maillog file regularly. Wietse