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Re: How badly have I screwed up?

From: Don Morris
Date: Friday, January 4, 2002
Time: 9:07:55 am

On 1/4/02 3:09 AM, Men & Mice Support wrote:

>Just have one MX record per zone. If you get a backup mail server in
>the future, you can add another MX record to each zone with relative
>ease.

Okay, that's simple enough.

>>And those names/records would look like what? Perhaps
>>
>>pop.officemedic.net CNAME mx1.officemedic.net ??
>
>Well, as Len indicated, CNAME records are not for newbies. But
>there's no reason that particular record wouldn't work, assuming
>you're going to run all mail-related services on one machine for the
>moment.
>
>If you really want to use CNAME records, just make sure that whatever
>name you use in the data portion (the right side) of an MX record,
>that name must have an A record and not a CNAME record. Also, keep in
>mind that a CNAME record can't have the same name as any other record.

My purpose for using CNAME records -- as was explained to me -- is that
if I changed the IP address of an A record in the officemedic.net zone
for, as an example, lists.officemedic.net, I wouldn't have to go through
every other zone and also update the IP address. If that's not what CNAME
records are for then I can do something different.

Your two caveats are well taken; I'll watch for that.

>>I'm having a problem where sending email through mail.officemedic.com,
>>for example, results in an error returned to EIMS: "Response: 450 Client
>>host rejected, cannot find your host name, [12.39.138.244]."
>
>That's a problem that's most likely created by your lack of a hostname.

Uh, is this something I can fix? Where and how?

>You should replace this CNAME record with the following, for maximum
>reliability:
>
>lists.officemedic.net. MX 10 lists.officemedic.net.
>lists.officemedic.net. A <IP address of list server>

Done.

>You should then configure your list server (is that EIMS or something
>else?) to accept mail for the name lists.officemedic.net.

Yes, EIMS accepts mail for lists.officemedic.net and routes it to port
325, where LetterRip (the list server, on the same machine) is listening.

>>So instead of
>>
>> mail.officemedic.com. CNAME mail.officemedic.net.
>>
>>I should have used
>>
>> mail.officemedic.com. A 12.39.239.244 ??
>
>Yes, that's what Len is suggesting. I can't disagree with him.

Hmm. I was hoping CNAMEs would make it easier for me. I'll read up on
them. Thanks!

--
Don Morris

$10,000 Marketing Tip: <http://1deg.net/mtotd.html>




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