Send and Receive Email in Mac OS X Mail (10.5 Leopard and higher)
Follow the steps below to set up your email address on your Mac running OS X 10.5 (Leopard), 10.6 (Snow Leopard) or 10.7 (Lion).
Open the Mail application, found in the Applications folder or in your Dock.
From the 'Mail' menu at the top left, select 'Preferences'.
In the Preferences window, select the 'Accounts' tab.
In the bottom left of the 'Accounts' window, click the '+' button to add a new email account.
In the 'Add Account' window this appears, enter your name as you wish for it to appear when sending mail, your email address, and your password, and click 'Continue'.
On the next screen, select the account type. IMAP is preferred, but POP will also work. Fill out the remaining account details and click 'Continue':
Incoming Mail Server: mail.b.hostedemail.com
User Name: [your email address]
Password: [your email password]
You may see a Verify Certificate window asking you to verify the identity of the mail server. Click 'Continue'.
On the next screen, enter the following details for your Outgoing Mail Server, and click 'Continue':
Description: [HOST.NAME]
Outgoing Mail Server: mail.b.hostedemail.com
Use Authentication: Yes (check this box)
User Name: [your email address]
Password: [your email password
The account will now test the settings you've entered. This may take up to several minutes to complete.. When it successfully completes, you will see the Account Summary screen with the details you have entered. To complete the email setup, click 'Create'.