Configuring the Mail Program for Your Email Account
After you have your email account information, you need to configure Mail to work with your email account. The first time you start the Mail program, it guides you through the process of typing in your email account information. If you have already set up an email account in Mail and want to configure a second account, Mail guides you through the same steps as if you were starting the Mail program for the first time.
Here's how to configure Mail to work with an email account:
Click the Mail icon on the Dock, or double-click the Mail icon in the Applications folder to start Mail.
Select File ▸ Add Account. (If you're starting Mail for the very first time, you won't have to select File ▸ Add Account ...