🚀 go-pugleaf

I've been doing some tracing on a problem that I discussed earlier.

=================
To recap:

mail from an MMDF site to user@foo.mydomain.edu gets source-routed to
@mydomain.edu:user@foo.mydomain.edu after a domain name lookup fails.

Since there is a mydomain.edu host, that's where it gets sent.

I was a bit unclear at the time why sendmail 5.6.1 plus IDA 1.2.8 would not
just bounce the mail back to the original sender as shown in the From:
field.
=================

After running etherfind on a session, I find out that the To: field inside
the mail message has been rewritten to:

user%foo.mydomain.edu@mmdfhost.mydomain.edu

Oh well - my mail system says this goes to mmdfhost.mydomain.edu and sends
the mail on to mmdfhost.mydomain.edu. The RCPT TO: command contains
 <user@foo.mydomain.edu>.

The mmdfhost just bounces the mail back to mydomain.edu, since foo.mydomain.edu
fails a domain name lookup.

Repeat the cycle for 17 times and drop the mail.

What can I do to fail the mail? Should I have PSEUDONYMS defined in the
sendmail.m4 file as mydomain.edu?

And unfortunately, I cannot follow the suggestion of the only person to
mail a reply - calling for email terrorism ;-).

Thanks for any help on this matter - /mde/