Subject: Disallowing mail relaying for Sendmail?
To: None <email@example.com>
From: Brian de Alwis <firstname.lastname@example.org>
Date: 12/31/1999 11:25:23
How do I configure sendmail to disallow relaying mail that is neither to
nor from a machine in my domain?
I've got a little network hidden behind a masquerading firewall, under
the domain `manumission.org'. All my machines are configured to relay
all mail through the firewall machine, and the firewall is configured
to rewrite the envelope to strip machine names to just
`email@example.com'. But this still allows `firstname.lastname@example.org' to
relay mail through my machine, which I'd like to disallow. Do I disable
the `smtp' mailer?
I know this isn't a NetBSD question (and the firewall in question is a
linux box), but you're some of the most knowledgable people I know. I've
read the sendmail FAQ, and it hasn't helped. Appended is my .mc file.
Thanks, and happy new year!