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Subject: Re: reject_unknown_sender_domain - still relevant?
From: LaMont Jones (lamontsecurity.hp.com)
Date: Sun Feb 06 2000 - 10:42:53 CST

> I note that the vast majority of "Domain not found:" messages due to
> 'reject_unknown_sender_domain' are from misconfigured sender mail systems, or
> misspellings in user MTA's.

If the mail bounces, and I have an undeliverable sender address, then
they'll never know. I find it better to reject such mail at the outset,
rather than having it disappear.

I find reject_unknown_sender_domain to be a very effective way to
get broken senders to fix their machines.

lamont