Sendmail message timeouts

[pdb at sei.cmu.edu.UUCP]

As distributed, Sendmail only allows you to have one kind of message timeout -
one that returns the message to its originator when it occurs.  Does anyone
have patches to Sendmail 5.54 that let you have "warning timeouts" (i.e.,
the sender getting back a message like "Your message has been undeliverable
for 1 day.  Delivery attempts will continue for 1 more day....")?

--Pat.