This is probably a bad idea. But I'll ask anyway...
We host our own mail server. This has extensive spam protection which
works reasonably well. In addition to our other tests I also make use
of "Project Tarbaby" - which provides a set of backup MX servers as
honeypots. Properly configured servers shouldn't hit these. I said
"properly configured" and "shouldn't".
We also use a fax-to-email service. Recently, they started using our
backup MX servers - I still don't know why. However, since I don't
administer their systems I can't fix that end. But as for ours...my
choices are either to drop the honeypot backup MX servers (which I know
many admins will recommend) or find another way. I was thinking that I
could setup a script that would only give the primary MX to designated
requestors. But I'd like to do that based on domain-name lookups
instead of hard-coding their IP's. Is this possible?
--
Daniel
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