Do I really need an MX record? (for e-mail to work)

[Carl Byington]

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n Thu, 09 Feb 2006 16:50:57 +0000, John Coutts wrote:

[snip]

> -------------------------------------------------------------
> X-Pobox-Antispam: require_ptr/ returned deny: 204.209.35.42 has no PTR
>  record, or PTR and A records do not match
> X-Sift-Reason: require_ptr/ returned deny: 204.209.35.42 has no PTR
> record,
>  or PTR and A records do not match

Yes, that is bogus reverse dns.

42.35.209.204.in-addr.arpa. 0   IN      PTR     mail.rewired.net.
mail.rewired.net.       3376    IN      A       216.234.167.142

I can setup reverse dns for one of my machines to be bush.whitehouse.gov,
but that won't imply anything about my network being associated with the
feds - unless they setup an A record for that name pointing to my ip
address.

Also, they might want to change that zero second TTL.

The question is - did the machine at 204.209.35.42 send the mail to pobox,
or did pobox find that ip address based on some other data from the smtp
conversation?

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