Welcome to the cPanel/WHM forums!
To create a horde account you are going to need to login to cPanel and click on the icon that says Mail
(should be the first one). Then from that page find the link that says Add/Remove/Manage Accounts
. At the bottom you want to click Add Account
. Fill in the information on that page and hit Create
. Now you are done. To login to Horde, you can go to domain.com/webmail and fill in your username (your username is your email address with the @domain.com part) and your password. Click on Horde and your good to go.
Login to cPanel
Click on Mail
> Add/Remove/Manage Accounts
> Add Account
As for the php mailer, could you give us some more information. Do you mean you want to pipe email from [email protected]
to a PHP script?