North American Network Operators Group
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Re: An A record is an MX record and is a missing MX....
- From: Adam McKenna
- Date: Fri Apr 04 15:05:45 2003
On Thu, Apr 03, 2003 at 05:25:35PM -0500, Richard Irving wrote:
> It isn't exactly completely RFC compliant, but, it is only a -=Request=-, eh ?
It is in fact required that an MTA fall back to the A record for a domain if
an MX record does not exist. See RFC 2821, Section 5, "Address Resolution
and Mail Handling".
> > Obviously some admins I have encountered are starting to host mailservers
> > for sub-domains and domains without MX entries on their DNS zone records.
> > Relying on the A record alone.
>
> Lemmings make a mad dash towards a cliff, every so often, en masse....
This is a fallacy perpetrated by Disney.
http://www.snopes.com/disney/films/lemmings.htm
--Adam
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