Instructions are shown below for Thunderbird, Apple/Mac Mail, and Outlook Express.
- Go to "Account Settings" under the "Tools" menu.
- Select the "Outgoing Server (SMTP) option.
- Select the "Edit" button for the account you want to edit.
- Under "Security and Authentication" is a checkbox for "Use name and password". This enables SMTP Authentication -- make sure that checkbox IS selected, and enter your username in there. (Your username is your full e-mail address.)
The following instructions are for the Apple Mail application:
- Select "Preferences" from the "Mail" menu.
- Once you are in the Preferences, click the "Accounts" icon at the top of the preferences pane. Then, click the desired account from the menu on the left.
- Click the "Server Settings..." button located near the bottom of the right side, below Outgoing Mail Server (SMTP).
- In the resulting window, type mail.yourdomain.com in the "Outgoing Mail Server:" field. (Use your own domain name there instead of "yourdomain.com")
- In the drop-down menu next to "Authentication:", choose "Password."
- In the username field, type your username (your username is your full e-mail address including the domain name).
- In the password field, type your password for that e-mail account.
- Click OK to activate the SMTP authentication.
Outlook Express 5.0 - 6.0+:
- From the Tools menu in Outlook Express, choose Accounts.
- Select your e-mail account in the "Account" list.
- Click "Properties".
- Click the "Servers" tab.
- In the "Outgoing" mail (SMTP) field, type the name of the SMTP server (user mail.yourdomainname.com)
- Check the box next to "My server requires authentication".
- Click "Settings".
- Select "Log on using".
- Type your full e-mail address in the "Account Name" field.
- Type your password into the "Password" field.
- Check the box next to "Remember Password" IF you want your password saved.
- Click "OK"