Re: [cobalt-users] MX record question / Raq4i

[Jeff Lasman <jblists@xxxxxxxxxxxxx>]

SM wrote:

> The issue is not whether the above configuration will work.  It is about
> whether the configuration adheres to the RFCs.  You use a SMTP server to
> run a mail service.  DNS has its responsibility in the configuration of a
> mail server.  The RFCs state that a service accepting mail should have
> valid MX record for all hosts which it serves.  They also states that the
> domain name should have a valid MX record.  ALthough the remote system will
> fall back to the domain A RR if there is no MX, that doesn't mean that
> running a mail service for the said domain without a MX record is correct.

While leaving out the MX records will work for most us with RaQs who
host mail on the same systems as we host the other services for the same
domain, in the real world this is not often the case.

We've got lots of customers who for various reasons (having to do with
database or FPX requirements) we host on W2kAS.  Their email is still
hosted on a linux box, and if not for the MX records, all their email
would be returned, as there is smtp daemon running on the W2kAS machine.

Jeff
-- 
Jeff Lasman <jblists@xxxxxxxxxxxxx>
Linux and Cobalt/Sun/RaQ Consulting
nobaloney.net
P. O. Box 52672, Riverside, CA  92517
voice: (909) 778-9980  *  fax: (702) 548-9484