Multiple CNAMEs - howto?

[Barry Margolin]

In article <ehvh6t$2bh2$1 at sf1.isc.org>,
 "Andy Shellam (Mailing Lists)" <andy.shellam-lists at mailnetwork.co.uk> 
 wrote:

> 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:
> 
> $ORIGIN mailnetwork.co.uk.
>     IN MX 10 uk1
>     IN MX 20 uk2
>     IN MX 30 uk3
> 
> It's for outgoing messages so users can either connect to 
> exchange.mailnetwork.co.uk (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 alum.mit.edu
Arlington, MA
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