David Rubin wrote: > > I verified the problem is exactly what was suggested, evidenced by detailed > logging: > > 16:12:25 mail.MYISP.COM( 3) <<< MAIL FROM:<> BODY=8BITMIME SIZE=1156 > 16:12:26 mail.MYISP.COM( 3) >>> 501 bogus mail from > > Assuming I have no hope of convincing MYISP.COM of fixing this problem, is there > any way to modify LISTSERV's behavior so that it does not use an empty MAIL FROM > string? I'm not sure why it is doing it in the first place, and why L-Soft > defends its use. Why doesn't it just put listserv's address in there? Because mail from:<> is the RFC-specified right way to send a bounce...if MYISP.COM is blocking all null envelope senders, then they're totally blocking bounces. I guess I'd just laugh about it and move on. Regards, Al Iverson -- Al Iverson -- [log in to unmask] -- Minneapolis, Minnesota My pockets hurt. http://www.spamresource.com/ Support Jazz in Minnesota! -- http://www.mnjazz.com/ All opinions are mine alone unless I state otherwise.