Re: DNS registrations for Exchange and RWW

Tech-Archive recommends: Repair Windows Errors & Optimize Windows Performance

On Sun, 26 Mar 2006 09:28:09 -0600, Cris Hanna (SBS-MVP) wrote:

Great site, Cris. Thanks much.

To be precise, here's how I have DNS set up:

A
Domain host name: providencereno.com
Points to: 71.144.115.66
TTL: 1 hour

CNAMES
Alias Name: freeport1
Points to Host Name: @ (equals "same as domain name")
TTL: 1 hour

MX
MX(0)
Host Name: @ (equals "same as domain name")
Goes to Address: providencereno.com
TTL: 1 hour
MX(10)
Host Name: @
Goes to Address: mailstore1.secureserver.net (there's a problem here)
TTL: 1 hour

The DNSreport "passed" everything until it got to the mail server
section. Lots' of problems here, as you foresaw, but they don't seem to
be related to the CNAME, or maybe they are, indirectly. I did pass the
"MX records are not DNAMEs" test and "MX A lookups have no CNAMEs".

1) Warn on "Mail server host name in greeting - "WARNING: One or more of
your mailservers is claiming to be a host other than what it really is"
and it talks about mailstore1.secureserver.net.
2) Failed on postmaster address. I don't have one. Guess I'd better make
one!
3) Warn on Acceptance of abuse address. Don't have one of those either.
4) Warn on SPF record. It seems I can use a wizard at
http://www.openspf.org/ to set one up. I had no previous idea, nor had I
heard of, SPF records. (Do I want to do that?)
5) I have no idea what to do about the MX(10) record.

Actually CNames are not the correct method.
You should go to www.dnsreport.com and enter your domain name (not www. or any other prefix...just your domainname.com or .net or whatever it is)

You will find that when you get the section on MX records its either going to give you a warning or failure because of using CNames

When I look up my domain name on this website, it returns the follow: OK. There appear to be no CNAMEs returned for A records lookups from your MX records (CNAMEs are prohibited in MX records, according to RFC974, RFC1034 3.6.2, RFC1912 2.4, and RFC2181 10.3).


--
Mike H
.

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