[Solved] Point webmail.domain.tld to gmail

[kaptk2]

I am looking for an easy way to point webmail.domain.tld to mail.google.com/a/domain.tld

I have found this thread: http://isp-control.net/forum/thread-4265.html but it does not quite do what I want. Any suggestions to get this working how I want? Ideally I would like to just use a PHP redirect because some domains do not use Google for their email. But when I try and create the subdomain I get an error saying that it can't be created.

Any help or ideas would be appreciated.