IP assignment for virtual webhosting

> > It even makes sense to point mail.customerdomain.com as a cname to
> > your mail.provider.whatever so that if there's a change you don't
> > have to reconfigure all MUA's.
> 
> No.
> 
> RFC 1912: "Common DNS Operational and Configuration Errors"

I believe the intention here is that primary MX for the domain is
mail.provider.com (A record, easily changed at the DNS), and the
SMTP server setting for customers' MUAs is mail.customerdomain.com
(valid use of CNAME, easily changed at the DNS instead of manual
reconfiguration).

Regards,
Dave

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