Email list test

[Fairlight]

On Mon, Oct 20, 2014 at 04:15:32PM -0700, Bob Rasmussen thus spoke:
> An email arriving at the list server indicates what IP address it
> comes from. If you resolve that IP (doing reverse DNS), you get a
> machine name. If you resolve that name (using DNS), you should get
> the same same IP address. If this is NOT true, the email list server
> rejects the post as possible spam (I don't know how commonly this
> rule is applied).

Welcome to Modern SMTP 101.*

And the rule is applied across the board at the MTA level at Celestial, and
anyplace with sensible SMTP-handling.  The list doesn't care; MailMan never
even sees the messages, as they get bounced at the MTA level before they
every make it thar far.  

In any event, RDNS being incorrect is tolerated at fewer and fewer places.

mark->

* And by "modern", I mean anytime in the last decade.
-- 
Audio panton, cogito singularis.