From: Joe Brennan on

> Are there any issues about this that I should be concerned about?  Should
> I (and is there a way) for me to block being an open relay for hosts in
> $w? can this be easily spoofed? Or is this OK for a production mail
> server?

In my opinion this is a bug in proto.m4. $w is all about handling
incoming mail, and relaying is a separate issue. We comment out the
line in proto.m4 each time we upgrade sendmail. We decide who to
relay for in access.db.

Joseph Brennan
Columbia University IT