At 08:50 AM 7/20/2001 -0600, you wrote: >On Thu, 19 Jul 2001 23:35:05 -0500, Tracey McCartney <[log in to unmask]> >wrote: > > >The logs show a "550 Relaying is prohibited" message for each > >recipient. > >LISTSERV does not itself send any mail to end recipients. Instead it >sends the >mail to an external (usually local) Mail Server which sends out the mail >to the >recipients. This error message is coming from that external mail server >and it >is refusing to accept (and realy onwards) mail from LISTSERV. This involves >some setting on that external mail server which must be set to allow the >(relay) >mail coming from LISTSERV to be accepted and processed. Nothing in >LISTSERV can >control this, it is merely trying to send the mail. This is what I thought. The SMTP_FORWARD originally was set to mail.uu.net (our ISP), and it worked without incident for a long time. Then things went kerblooioe. Coincidentally or not, this happened around the same time I made some routing config changes to our Exchange server, but I never dreamed that would affect the Listserv box, which I thought was not interacting with the Exchange server at all. If there was a problem with UUNet (and they insist there's not), I've worked around it by now running Listserv through our Exchange server and then straight to the net (after numerous trial-and-error routing configuration tweaks). I *just now* got things going again. Thanks, Tracey