\*(mp will forward non-delivery reports to a postmaster after deleting the body
of the message. This keeps bounced mail private and helps to avoid disk space problems. \*(mp tries its best to keep as much of the header trail as possible.
Hopefully only the original body of the message will be filtered. Only messages
that have a subject that begins with 'Returned mail:' are filtered. This
ensures that other mail is not accidently mucked with. Finally, note that
\fBsendmail\fR is used to deliver the message after it has been (possibly)
filtered. All of the original headers will remain intact.
.sp 1
You can use this with any \fBsendmail\fR by modifying the Postmaster alias.
If you use IDA \fBsendmail\fR you could add the following to <machine>.m4:
.sp 1
.RS
define(POSTMASTERBOUNCE, mailer-errors)
.RE
.sp 1
In the aliases file, add a line similar to the following: