How do I enable SMTP authentication?

You may find that you cannot relay mail because you have not enabled SMTP authentication in your e-mail client. The steps you use to resolve this problem depends on the mail client you utilise. A few commonly used mail clients are Outlook Express and Microsoft Outlook 2003:

Outlook Express: click Tools > Accounts > Under the "mail" tab select an email account > properties > Select the "Servers" tab > Under "My server requires authentication" simply tick this (You may use the same settings as your incoming mail server, pop3).

Microsoft Outlook 2003: click Tools > Email Accounts > Select "View or change existing email accounts...", click Next > Select your email account > Click "Change" > More settings > Under the "Outgoing Server" tab tick "My outgoing server requires authentication".

Microsoft Outlook 2007:

Mac Mail:

1. Open Mac OS X Mail.
2. From the Mail menu, choose Preferences.
3. Click the Accounts icon.
4. Click the Account Information tab.
5. From Outgoing Mail Server (SMTP), mail.yourdomainname
6. Click the Server Settings….
7. Select Password from the Authentication drop-down box.
8. Type your email ID in the User Name: field.
9. Click OK.
10. Close the Accounts window.
11. Click Save to save the changes that you made.