>2. 451 4.1.8 <[EMAIL PROTECTED]>...Domain of sender address
>[EMAIL PROTECTED] does not resolve
Your DNS has problems. First, your mail server's IP address doesn't have a
reverse DNS entry. That's strike number one. Then, your primary DNS
server doesn't seem to be responding. Finally, you're listed in
dsn.rfc-ignorant.org, which some admins use to weed out people who don't
allow Delivery Status Notifications into their server.
>We've recently moved the Imail server behind a NAT, and have had some
>trouble with DNS and forwarding, so this may have caused the problem.
Yes, that does seem to be what caused the problem. You need to get it so
that your primary DNS server is reachable. Until that happens, your DNS
will start crumbling as the TTLs are reached.
-Scott
Declude: Anti-spam and Anti-virus solutions for IMail. http://www.declude.com
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