Step #1. Create A New Account
Once you start Mac Mail, you will be presented with the Welcome to Mail window if this is the first mail account you are adding. If this is not the first mail account, you can add an account by clicking on the Preferences option from the Mail menu and then clicking on Add Account.
Step #2. Account Information
On the following screen, you will want to fill in the appropriate information. For example, the screenshots below assume that you have chosen the server type as IMAP. You can use either POP or IMAP when setting up your account.
Name of the user for the account
Email address of the user
Incoming Mail Server:
Choose either POP or IMAP from the drop down list
Full email address of the user
Fill in the value for the user password
Outgoing Mail Server (SMTP):
Click the OK button at the bottom of the window.
Step #3. Edit Account
Once the account information is entered, click Preferences from the Mail menu and then click the Accounts button from the menu. Click on the newly created mail account in the Accounts list and you should see the information that you just entered. You will now want to click on the Server Settings button located in the Outgoing Mail Server (SMTP) section.
Step #4. SMTP Server Options
On the SMTP Server Options window, you will want to choose "Password" from the Authentication drop down list, fill in your full email address in the User Name field, and then fill in your mail account password in the Password field. You can now click the OK button.
Step #5. Setup Complete
You have now finished configuring your mail account and can successfully send and retrieve your email.