I use Lotus Webmail on my 8820... you must use your company outside email address (ie. mail.company.com or node.company.com)... how ever yours is set up. I got this info from our IT dept. It's not as simple as setting up a gmail or yahoo mail account.
I started up in the email set up...
and my password... it tries to connect to no avail... the next options your BB will ask are the mentioned settings above.