Andrew McGlashan <[email protected]> writes:

> Can rDNS lookups for different IPs return the same result such as
> "mail.example.com" or must each IP have it's own unique PTR record
> name?

Apparently they can, though I don't like the idea. For outgoing email,
you need to make sure that the hostname given in [E]HLO statements and
the IP address of the host connecting to a remote MTA always match when
the remote MTA resolves either.  You may send me some test mails to
check.


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