> You don't seem to understand the meaning of "principal host domain name"
> as it is interpreted for RFC 1123 Section 5.2.5. This is odd because
> that very same section gives you this definition in these plain words:
>
> The HELO receiver MAY verify that the HELO parameter really
> corresponds to the IP address of the sender.
And greg woods is not doing this verification. If he was, there wouldn't be
a problem.
My server does:
EHLO animx.eu.org
animx.eu.org's A is 216.98.75.249. My server's IP is 216.98.75.249
> I.e. the principal host domain name that "MUST" be used when an SMTP
> client identifies itself with a HELO/EHLO command is one which the
> receiving-SMTP can resolve to an A record which matches the client
> connection source address.
Same thing.
> Note that a host domain name may resolve to multiple A records but it is
> only necessary that one of them match. Indeed this is the way you must
> configure your DNS if you are using a multi-homed host (i.e. a host
> which might originate connections from multiple source addresses).
animx.eu.org resolves to only 1 A RR.
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