[imp] Configuration of Horde - Changing the accepted header from the browser

[David DeStefano]

I am relatively new to Plesk and am trying to reconfigure Horde to
accept a page request for webmail.  By default it appears to only allow
access to webmail when you use the address - webmail.(your-site).com.
This doesn't work well for me and would like to know how to change it so
that I can use another address as the webmail address.  
 
I am working on both the linux and windows 2003 version of Plesk 7.   I
will ultimately be moving from the Linux side to the Windows side and
this webmail portion is one of the steps in the migration.
 
Any Help is appreciated.

Thanks,
David