Re: PTR Records
- From: "Herb Martin" <news@xxxxxxxxxxxxxx>
- Date: Tue, 29 Nov 2005 08:26:57 -0800
> I'm a little confused as to what to do with the CName records. We receive
> email addressed to all of those domains. Here's what is currently there:
>
Mail for one domain does NOT need to go to a server from that (same)
domain.
E.g., mail for LearnQuick.Com USED TO go to smtp.outernet.com
(perfectly legal).
Mail for main domains can go to the same email server (if it can
handle that.)
Your outgoing email server should report is name truthfully (in it's
HELO) and that is the one that should have a PTR with an A-Host
that return the equivalent Address/Name pair.
Your incoming email server should have an MX for each domain
(in the appropriate zone files) it handles, and that of course points
from domain to an name which is an A-host record.
Actually, your incoming email SHOULD be able to be separated from
your outgoing email anyway (except by for some hosed up recipients
who will insist your outgoing email server have an "MX" record which
is neither the RFC nor even always sensible.)
--
Herb Martin, MCSE, MVP
Accelerated MCSE
http://www.LearnQuick.Com
[phone number on web site]
"MC" <mc@xxxxxxxx> wrote in message
news:eZt8kEP9FHA.444@xxxxxxxxxxxxxxxxxxxxxxx
> Thanks, Kevin. I got the A records for dewey and changed the MX records;
> and deleted all of the MX records that pointed to mail@......
>
> I'm a little confused as to what to do with the CName records. We receive
> email addressed to all of those domains. Here's what is currently there:
>
> (same as parent folder) Host 168.9.128.18
> (same as parent folder) Mail Exchanger [10] dewey.cowetaschools.net.
> (same as parent folder) Name Server dns1.cowetaschools.org.
> (same as parent folder) Name Server dns2.cowetaschools.org.
> (same as parent folder) Start of Authority [2005100608],
> dns1.cowetaschools.org., administrator.cowetaschools.org.
> dewey Host 168.9.128.29
> mail Host 168.9.128.29
> pop Alias mail.cowetaschools.org.
> smtp Alias mail.cowetaschools.org.
>
> What do I need to change/add to fix that?
> And how should I fix the NS record problems?
>
> I really appreciate your help. As you can see, our DNS has been needing
> attention for a long time.
>
> Thanks again.
>
>
> "Kevin D. Goodknecht Sr. [MVP]" <admin@xxxxxxxxxxxxxx> wrote in message
> news:uQ9Mn3O9FHA.740@xxxxxxxxxxxxxxxxxxxxxxx
>> MC <mc@xxxxxxxx> wrote:
>>> Hi Herb,
>>>
>>> Thanks for your reply. The info that I found was from DNSReport.com.
>>>
>>> The domain is cowetaschools.net. I appreciate your help!
>>
>> This domain is not the only domain that has DNS problems in the setup.
>> There
>> are several issues that need to be cleared up before your problems will
>> go
>> away.
>>
>> Your mail server's HELO name is dewey.cowetaschools.net, there is no A
>> record matching that name.
>>
>> You need to create an A record for dewey.cowetaschools.net, then delete
>> all
>> your MX records in all your domains and create new MX records giving
>> dewey.cowetaschools.net as the mail server name.
>> Then you need to delete all five of the PTR records that exist for this
>> IP
>> and create one PTR that points to dewey.cowetaschools.net.
>>
>> For the other domains you can create CName records for whatever name you
>> choose to have these clients access the mail server by. Mail clients do
>> not
>> look for and do not care what the MX record says. However, when a mail
>> server tries to deliver mail everything should match up. Some mail
>> servers
>> will refuse to accept mail from or deliver mail to your mail server
>> because
>> nothing matches up. Do not use the CNAME in the MX records, the MX
>> records
>> should point to the mail servers HELO name regardless of what domain the
>> MX
>> record belongs to.
>>
>> You should also create a SPF record for your domains, too. You can use
>> the
>> wizard a http://spf.pobox.com to create the data for the SPF record, you
>> can
>> use the same data for all domains since they all use the same mail
>> server.
>>
>> You also have NS record problems in your domains. It is not necessary for
>> the NS record to be in the same domain as the domain it is hosting, but
>> it
>> is required that NS records match the NS records listed on the public
>> record
>> for the domain.
>> As it is now, you only have two domains which have the correct NS records
>> that match the public records.
>>
>>
>> --
>> Best regards,
>> Kevin D. Goodknecht Sr. [MVP]
>> Hope This Helps
>> ===================================
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>> me remove the nospam. from my email address.
>> ===================================
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>> ===================================
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>> It will strip signature out and more
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>> ===================================
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>> with OEBackup:
>> http://www.oehelp.com/OEBackup/Default.aspx
>> ===================================
>>
>>
>
>
.
- References:
- PTR Records
- From: MC
- Re: PTR Records
- From: Herb Martin
- Re: PTR Records
- From: MC
- Re: PTR Records
- From: Kevin D. Goodknecht Sr. [MVP]
- Re: PTR Records
- From: MC
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