Here's how you can reproduce this bug: create an account blablabla.example.com, go to its cPanel area and create [email protected]
In WHM as root, click "Modify an Account" and change blablabla.example.com to blablabla.com
Then go back to WHM, list all accounts and in the list, click the cPanel icon in front of blablabla.com: Instead of opening the blablabla.com cPanel, it'll open the example.com cPanel
Also, if you access blablabla.com/webmail and try accessing your e-mail account [email protected], Squirrelmail will always prompt the login screen. I also tried [email protected] with no more luck. I also deleted and recreated the e-mail account.
In WHM as root, click "Modify an Account" and change blablabla.example.com to blablabla.com
Then go back to WHM, list all accounts and in the list, click the cPanel icon in front of blablabla.com: Instead of opening the blablabla.com cPanel, it'll open the example.com cPanel
Also, if you access blablabla.com/webmail and try accessing your e-mail account [email protected], Squirrelmail will always prompt the login screen. I also tried [email protected] with no more luck. I also deleted and recreated the e-mail account.