A few weeks ago I asked the list for help regarding a majordomo digest
list that was generating a large number of bounces with the error
message "user unknown" when we knew that the user addresses were good.
First, thanks to those who responded, particularly Nigel Metheringham
<email@example.com> who spotted the fact that the remote host
transport was sendmail and the error message we were receiving refered
to the list owner rather than the target user.
It seems that some sendmail installations can't deal with the
Error-to: header, possibly looking on their own systems for the user
listed there or simply rejecting that header (non-standard?). When I
took the text generating the Error-to: header out of the digest
script, the mail succeeded
Don Hayward, JAPH
Mote Marine Laboratory firstname.lastname@example.org
1600 Ken Thompson Parkway Voice: 941.388.4441
Sarasota, FL 34236 Fax: 941.388.4312
We are an independent, non-profit, marine and estuarine
research and education facility.
require "disclaimer.pl"; # We run Linux