[Mimedefang] OT: DNS sanity check

[John Rudd]

Les Mikesell wrote:

> And section 4.1.4 says:
> 
>    "An SMTP server MAY verify that the domain name parameter in the EHLO
>    command actually corresponds to the IP address of the client.
>    However, the server MUST NOT refuse to accept a message for this
>    reason if the verification fails: the information about verification
>    failure is for logging and tracing only."
> 
> But, since you are dealing with someone who isn't following the RFC's
> anyway, you probably aren't going to get it changed on the receiving
> end.  Your ISP should either delegate reverse DNS to you or handle it
> for you, or provide a forwarding SMTP server, or both.
> 

Or maybe you're just not reading what's written.

They aren't rejecting based on bad HELO information.  They're rejecting
based on bad DNS information.  Two entirely different things.

The OP hasn't even said word one about what's in the HELO information,
and whether or not that's valid.

The ISP's statement has nothing to do with HELO information, and
everything to do with PTR an A record information.

So, clearly, your claim that they're not following RFC's is unsupported.