[EXIM] Spam relay fighting, help!

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Autor: Ring, John C
Fecha:  
A: Exim User's List (E-mail)
Asunto: [EXIM] Spam relay fighting, help!
Greetings!

I'm having a bit of trouble stamping out relaying. I'm using Exim
version 1.73 #1 built 12-Dec-1997 09:13:38.

When I first tested my configuration, all appeared well with my tests.
However, it appears someone's found a trick for Exim, at least with my
current config, to relay email. Apparently, simply putting

TO: --.--@switch.com

after the DATA statement is causing Exim to actually send messages with
non-local RCPT TO addresses. The relevant lines, I think, from our Exim
configure file is:

LOCAL_NETS = <list of local networks, firewall network excluded>
relay_domains = *switch.com
sender_net_accept_relay = LOCAL_NETS

Note that the Exim machine sits behind a firewall with will accept any
message, but will simply forward it to the Exim machine for actual
sending.

Any help GREATLY appreciated!!

-------------------------
John C. Ring, Jr.
jcring@???
Network Specialist II
Union Switch & Signal Inc.

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