>I've noticed that even Microsoft email is failing the REVDNS test. It's
>probably because their server is behind a firewall.
No, that's not it. Even if their mailserver is behind a firewall (in which
case it likely has a private IP), Declude will see the public IP address,
which definitely should have a reverse DNS entry. I'm quite surprised that
Microsoft would make a mistake like that (unlike other types of mistakes
that Microsoft makes that don't surprise me...).
>Anyone got a good suggestion for how to handle email servers behind
>firewalls that fail REVDNS??
Firewalls can't prevent reverse DNS lookups from being done. It's
impossible. They could (in theory, although I've never heard of it being
done) block reverse DNS requests *if* the DNS servers are all behind the
firewall. But, they shouldn't all be behind the firewall.
-Scott
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