Multiple CNAMEs - howto?

Barry Margolin barmar at
Sat Oct 28 14:29:06 UTC 2006

In article <ehvh6t$2bh2$1 at>,
 "Andy Shellam (Mailing Lists)" <andy.shellam-lists at> 

> Incoming messages is not a problem - they *should* come to uk1 
> primarily, and only to uk2 or 3 if the previous are unavailable.
> For that I have the setup:
>     IN MX 10 uk1
>     IN MX 20 uk2
>     IN MX 30 uk3
> It's for outgoing messages so users can either connect to 
> (which will in effect be a round-robin for 
> all 3 servers), or directly to uk1, 2 or 3.
> I believe mail clients use the A records for SMTP?

True.  You'll have to do multiple A records, multiple CNAMEs are not 
allowed by BIND.

Barry Margolin, barmar at
Arlington, MA
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*** PLEASE don't copy me on replies, I'll read them in the group ***

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