[BlueOnyx:05089] Accessing /webmail from main server name or IP

[James]

One other oddity I have been trying to wrap my brain around...  Accessing
webmail via any of the configured site domains works fine, so I can go to
http://www.site1.com/webmail/, and I get the SquirrelMail interface that I
expect to see.  However, if I try to access via
http://systemhostname.systemdomainname.com/webmail/ or
http://111.111.111.111/webmail/, I get a plain text view of the actual
contents of SquirrelMail's PHP scripts.  This occurs on both existing and
freshly built servers.  I guess it's expected that the average user should
access webmail via their domain name, but I would expect these others to
work as well.  Do I need to throw in a type/handler for php in a main config
file somewhere?

thanks!
James