> Nathan Brindle wrote:
> >
> > Are you sure this is coming from LISTSERV?  This sounds like an
> > error coming from the MTA, not from LISTSERV itself.
>
> Hate to admit I'm a newbie, but what's MTA?

Mail Transfer Agent...LSMTP in your case.

> The error message is
> listed at coming from Listserv, so I assume that it is actually making
> it that far.

It would be very helpful to see the error message in it's entirety.

>To be a little more specific, I run Listserv Classic 1.8d
> with LSMTP 1.1b on a WIN NT box. The original message comes from my
> web server with an altered <FROM> address to appear as the person
> wishing to send the subscription command.

This should work if properly formatted.

> It then bounces back to my
> server, which sends it to the postmaster address as an error. The
> <FROM> on the original error going back to the server is our
> listserv's address. Any ideas?

Check LSMTP's Relay control and make sure your sending server's IP is
listed as a relay mailer. I'm not sure at this point what's happening until I see
the error. I'm a newbie too.