On Tue, Mar 07, 2000 at 04:03:31PM -0800, Bryan Curnutt wrote:
[snip setup]
> 
> dunkdunk.dev.salu.com has an MX record pointing to web.dev.salu.com.
> Also an A record pointing to the same IP as web.dev.salu.com (formerly
> a CNAME record pointing to web.dev.salu.com, temporarily changed to
> an A record to see whether it made any difference).

Well, the CNAME is breaking a couple of rules here:
- never have a CNAME and one or more other records on the same hostname
- never send mail to a CNAME
- never have a MX be a CNAME itself.

I think the problems with the A record are related to nameserver cache
refresh timeouts.

Also, sendmail indeed does rewriting on a CNAME, which might be an
explanation. Actually, qmail does that too. It's an RFC rule.

Greetz, Peter.
-- 
Peter van Dijk - student/sysadmin/ircoper/madly in love/pretending coder 
|  
| 'C makes it easy to shoot yourself in the foot;
|  C++ makes it harder, but when you do it blows your whole leg off.'
|                             Bjarne Stroustrup, Inventor of C++

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