The current scheme (as of IW 4.7) to access Webmail is to use the domain followed by a / and then webmail, thus if your domain name is happytimes.com you would access webmail using http://www.happytimes.com/webmail
This is all fine and good, however, I would like to use SiteWorx for email for some of my cPanel accounts. And I would like some capability to point the MX record to the SiteWorx account as well as the A Record for webmail. Thus the need, as I see it, instead of webmail being access like this: http://www.happytimes.com/webmail
It would be accessed like this: http://webmail.happytimes.com
This would help resolve a lot of issues.
OR Both would be good as well.
When your clients visit webmail.happytimes.com you could either redirect with a .htaccess file or alternatively have some sort of portal/splash page for the 3 webmail clients. This is also nice because horde, squirrelmail, and roundcube will be accessible at webmail.happytimes.com/horde, etc…