How to use an IP when the FQDN exists for a host ?

To: hobbit (at) hswn.dk
Subject: How to use an IP when the FQDN exists for a host ?
From: pkc_mls <pkc_mls (at) yahoo.fr>
Date: Mon, 25 Feb 2008 09:06:51 +0100
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Hi all,

I have an entry in my bb-hosts for an smtp server :
1.2.3.4    smtp.domain.com # smtp

but the smtp.domain.com is resolved with a different IP, so the check isdone with the

IP that comes from the DNS resolution.

is there a way to use the IP ? (I'd like to keep the name).

thanks