Auto-configure email for iPhone
The current auto-configure for email clients seems to work fine in most cases and has cut down on our support costs per client. The one still killing us though is iPhone email configuration for IMAP and POP3!!
We take calls daily with people needing help setting up their iPhones to work with cPanel email servers. If you google it, quite a few hosting companies even had to put together how-to videos, it's that challenging.
cPanel needs to work on making it MUCH easier to setup an iPhone to work with the cPanel email system.