LinuxQuestions.org - setting virtualhost without IP

can someone tell me how to set up my apache to redirect to teh right domain without having to specify my IP in httpd.conf? as my IP is technically dynamic i have to change my config each time my ip changes... although this has only ever happened once... a chunk of my conf says:

Code:

# Virtual host Default Virtual Host

<VirtualHost 80.207.153.3>

        ServerName thirtythreeandathird.net

        DocumentRoot /var/www/html

        DirectoryIndex index.php index.html index.htm index.shtml 

        LogLevel debug

        HostNameLookups off

</VirtualHost>



# Virtual host mail

<VirtualHost mail.thirtythreeandathird.net>

        DocumentRoot /var/www/html 

        ServerName mail.thirtythreeandathird.net

        ServerAlias mail

        LogLevel debug

        RedirectMatch ^.*$ https://www.thirtythreeandathird.net/horde/imp

</VirtualHost>

with the ip in place in the first line it works correctly but if i replace it with the domain name to just thirtythreeandathird.net then it automatically forwards to the second virtualhost here. I'm assuming it uses this one as it's just the next in line. so is it possible to remove my IP altoghether?