Priority of MX record

Barry Margolin barmar at alum.mit.edu
Fri Dec 23 19:46:20 UTC 2005


In article <dohgnf$vqt$1 at sf1.isc.org>,
 leicheong.bbs at bbs.sayya.org (²z©÷) wrote:

> Hello,
> 
>     Say we have a domain name of abc.com. The DNS entries are as
> the following.
> 
> abc.com MX 10 mail.abc.com
> abc.com MX 20 mail2.abc.com
> 
>     This morning, we find that our internet connection of mail.abc.com
> is not working. But while mail2.abc.com works normally, it seems we're
> still not getting any emails. So finally I have to switch the priority
> of them to make it work.
> 
> Aren't the "priority" of a MX record be used as a fallback when one
> mail host is inaccessable? Or do I have some misunderstanding on this
> matter?

Your understanding is correct.  Are you sure that mail2 is set up 
properly to deliver the mail?  If it's trying to connect to mail via its 
Internet connection rather than an alternate path, the mail will still 
be stuck on mail2.

-- 
Barry Margolin, barmar at alum.mit.edu
Arlington, MA
*** PLEASE post questions in newsgroups, not directly to me ***
*** PLEASE don't copy me on replies, I'll read them in the group ***



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