[Mimedefang] MX -> 127.0.0.1

[David F. Skoll]

Kevin A. McGrail wrote:

>>It's easy to set up and solves a bunch of problems. There's no excuse for
>>publishing RFC1918's IPs in a public DNS

> I'm not arguing it's right or good,

I'm arguing that it's wrong and bad.

Publishing RFC1918 addresses as MX hosts means you're willing to let
people send mail for your domain to random servers all over the Internet,
with totally unpredictable results.

> I'm simply saying it's commonplace and will cause false positives.

Open relays used to be common until their admins got beaten into
submission. :-)

Regards,

David.