1. From the Tools menu choose "E-mail Accounts... "
2. Select View or change existing e-mail accounts
3. Select the e-mail account and click on the "Change" button.
4. From the E-mail Accounts window select "More Settings..."
5. On the Internet E-mail Settings window select the Outgoing Server tab.
6. Check "My outgoing server (SMTP) requires authentication. Choose "Use same settings as my incoming server "
Thunderbird
1. Go to "Tools -> Account Settings -> Outgoing Server (SMTP)".
2. Select the server and press the Edit... button.
3. Check the "Use name and password" option.
4. Add your username. Your Username Is Your Full E-Mail Address (E.G., "Johndoe@Domain.Com").
5. Click "OK".
Thunderbird will ask you for your password the first time you send email and you can optionally save it at that time.
Mail for Mac OS X
1. From the Mail menu, choose Preferences.
2. Click on the "Accounts" icon.
3. Click "Account Information" tab.
4. Click the "Server Settings" button.
5. Click the "Authentication" drop down box.
6. Select "Password".
7. Enter your email id in the "User Name:" field. Your Username Is Your Full E-Mail Address (E.G., "Johndoe@Domain.Com").
8. Click "OK".
9. Close the Accounts window.
10. Click Save to save the changes that you made.
