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"Tom Jedrzejewicz" <tomjedrz@xxxxxxxxx> wrote:
You can specify IP addresses from which Exchange is to allow relaying.
Yes, I'm told that's how we did it in the previous mail server, but apparently it allowed (by what mechanism I know not) somebody from the outside to use it as an open relay, which appears to have gotten us on a rather significant blacklist.
Is there a way to either prevent this hijacking from happening, or to have the OS/400 SMTP authenticate itself, or even to have it relay through something other than the mail server (e.g., the firewall in our Linksys router)?
I'm grasping at straws here, and I don't know enough about the mechanics of email to even be sure I'm asking the right questions (nor am I the email administrator).
-- JHHL
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