Re: MX Record Question

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"nesdog" <nesdog@xxxxxxxxxxxxxxxxxxxxxxxxx> wrote in message
news:BA671CA4-9111-429C-B92E-9BBEBBFF3773@xxxxxxxxxxxxxxxx
(I apologize if this is a double post...IE crashed when I pressed Post
last
time and I don't know if this made it in.)

In a nutshell, I'm changing the IP address of our mail server. Our
internal
DNS shows an mx record that shows the current IP address. Our Outlook
clients
are set to smtp.xxx.org rather than the IP address but I don't know how I
set
this up before to resolve the name. There is no listing within DNS to
smtp.xxx.org.

The DNS zone for xxx.org would have an entry for the SMTP server,
likely and A record plus the MX record.

This does not need to be changed.

Any REVERSE records (PTR) in the reverse zones should however
be updated to reflect the change -- this is MOSTLY important for external
sending of email (to other companies.)

So, does having smtp as a prefix automatically mean the client should
search
out the mx record? Or do I need to create an alias? Or something else?

Not at all. Your 'name' for your SMTP email server is ENTIRELY
irrelevant except that it should make sense AND for external use should
be the same name as your Email server reports.*

*That is, your A record, the MX record, and the PTR record plus what
the SMTP server CLAIMS in it's HELO should match if you want most
everyone on the Internet to accept your email.

(Some of this is BEYOND the RFCs and generates infinite arguments
about the propriety of all being required, but you want your email to
be accepted rather than to win arguments.)

(sorry again if this is a double...)



--
Herb Martin, MCSE, MVP
Accelerated MCSE
http://www.LearnQuick.Com
[phone number on web site]


Sheldon


.

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