RE: Is Hotmail in the habit of ignoring MX records?

[George Bonser <gbonser () seven com>]

> From: Ryan Rawdon 
> Sent: Thursday, July 26, 2012 7:06 AM
> To: nanog () nanog org
> Subject: Re: Is Hotmail in the habit of ignoring MX records?


> No solution to the issue was found in the various forks of that thread,
> however one individual afflicted by this issue (the OP) seems to have
> resolved his specific issue with Hotmail by fixing his MX records to be
> in stricter compliance with RFCs and best practices (removed a CNAME) -
> that said, per the quote above Hotmail should not have been falling
> back  to the A records or any other RRs for the hostname.

I would say MX pointing to a CNAME instead of pointing to an A record is the #1 cause of intermittent mail delivery 
problems I have seen.  Some MTAs seem to tolerate it, some don't.

G