1. Having 1 user who has multiple email accounts (each linked to a different domain)

2. Being able to check all those email accounts from a single log-in/screen (not needing to log out and log in as a different user/email address).

Currently I am in this situation:

1. I have 1 user who has the name rod@rodneyhowell.com, who has the default email address rod@thenatureofzen.com and I would like to change that address to rod@rodneyhowell.com (I do not see any way to change it on the screen: Control Panel>User Details>Mail Accounts). On that screen when I try to change "Mailbox Address" only 1 email address shows up which is rod@thenatureofzen.com.

2. On the screen: Control Panel>Mail Administration>Mail Accounts, the only email address that shows up is rod@thenatureofzen.com. I am unable to add an additional email account of rod@rodneyhowell.com.

3. However if I click on my account icon in the upper right of the screen my account details show rod@rodneyhowell.com as my primary email address.

Please help me sort this out. Thank you so much!