>Whats the easiest way to secure my mail server (imail 6.06) from
>being an open relay.
oh, just joined the list?
easiest: RTFM, RTFKB, RTFMLA, it's been explained godzillion times. :))))
< and they're all the same explanation >
> We are an ISP and putting in all the ip's (even subnets) could be tough
SMTP AUTH is your friend.
>, but I'm considering it. What about the "relay mail for local
>hosts" or "local users" option?
Just Say No.
>Will this require any changes to the end users?
Cut off their hands, seal their lips, remove their wallets.
>There are maybe a thousand users already using.
Bite the Bullet and have them all switch to SMTP AUTH.
Read all about it: http://www.mailops.com/Help/SMTP/SMTP%20AUTH.htm
Len
http://MenAndMice.com/DNS-training : In Austin, TX; SFO, CA; Paris,
FR
http://BIND8NT.MEIway.com : ISC BIND 8.2.3 "NT3" for NT4 & W2K
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