[Mimedefang] md_check_against_smtp_server and down server?

[Damrose, Mark]

-----Original Message-----
From: Kayne Kruse

> # Begin auto generated section....
> domain.com<TAB>REJECT
> To:user at domain.com<tab>RELAY

This doesn't work (as you found out).

With per user rules, you need to put "domain.com" in /etc/mail/relay-domains.

Then in /etc/mail/access, write:
domain.com<TAB>ERROR:5.1.1:"550 User unknown"
to:user at domain.com<TAB>OK

domain.com<TAB>REJECT may also work, but I'm not sure what error message would be generated.  It's a fine line between not giving a spammer a clue as to what part of you filter (s)he tripped, and not giving real users a genuine error message.