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

[David Thurman <dthurman@xxxxxxxxxxxxxxxxxxxx>]

on 12-17-01 3:35 PM, Bruce Timberlake at bruce.timberlake@xxxxxxx was
reported to have made a statement that said this:

> Jeff Lasman wrote:
>> 
>> While your second statement IS true, your first isn't.  Because the
>> Internet sees "domain.com" as a completely different domain than
>> mail.domain.com, each is a "domain" and each needs a primary MX record.
>> 
>> Because many smtp servers will default to using an A record if there's
>> NO MX record for a domain doesn't mean all will, and doesn't mean you
>> shouldn't have those MX records.  Each of these MX records will be seen
>> as completely independent.
>> 
>> So yes, you should have the following MX records:
>> 
>>  domain.com.      IN      MX      30      domain.com.
>>  mail.domain.com. IN      MX      30      domain.com.
>>  www.domain.com   IN      MX      30      domain.com.
>> 
>> And while I hate to disagree with someone from Sun/Cobalt, the fact is
>> that yes, Bruce, I have written the book on DNS (just haven't gotten it
>> published yet, but I'm working on it <smile>).
> 
> I defer to Jeff's knowledge of DNS... :)  Just because I work for Sun
> doesn't mean I'm always correct, and I'm glad to be corrected so that I
> don't continue giving out confusing/wrong info in the future.
> 
> I do have my own RaQ set up as I have described, though, and it works
> fine for me.  Having multiple MX records probably eliminates confusion,
> though, or at least minimizes the gremlin factor...

Color me red:)
So if I have domain.com, mail.domain.com and www.domain.com, I should create
a MX with the same value for all. Maybe this would answer why sometimes mail
is lost.

--
Thank you,
David E Thurman
The Web Presence Group
309.676.5688
dthurman@xxxxxxxxxxxxxxxxxxxx
http://www.webpresencegroup.net