If you're configuring SMTP Authentication for an existing Outlook 98 and 2000 account, do the following:

1. Open Outlook.

2. Select Accounts (or Services in Outlook 98) from the Tools menu.

3. Click the Mail tab (or go to Email Service tab in Outlook 98).

4. Select your email account and click the Properties button.

5. Click the Servers tab.

6. On the Servers tab, select My server requires authentication.

7. Click the Advanced tab.

8. Enter "993" in the Incoming IMAP port. (i.e. replace "143" with "993")

9. Enter "445" in the Outgoing SMTP port. (i.e. replace "25" with "465")

10. Click Apply.

If you're configuring SMTP Authentication for an existing Outlook 2002 (XP) account, do the following:

1. Open Outlook.

2. Select E-mail Accounts from the Tools menu.

3. Select View or change existing e-mail accounts.

4. Click Next.

5. Select your email account and click the Change button.

6. Click the More Settings button.

7. Click the Outgoing Server tab.

8. Place a check in My outgoing server (SMTP) requires authentication.

9. Select Log on using and enter the username in the Account ID field and your password into the Password field.

10. Click OK, and then click the Next button.

11. Click Finish.

12. Go to the File menu and select Exit. The next time you start Outlook the new settings will take effect.

If you're configuring SMTP Authentication for an existing Outlook Express 5 or 6 account, do the following:

1. Open Outlook Express.

2. Select Accounts from the Tools menu.

3. Click the Mail tab or go to the Email Service tab for Outlook 98.

4. Select Accounts and click the Properties button.

5. Click the Servers tab and check My server requires authentication.

6. Click the Advanced tab.

7. Enter "465" in the Outgoing mail (SMTP) port. (i.e. replace "25" with "465")

If you're configuring SMTP Authentication for an existing OS X Mail account, do the following:

1. Open OS X Mail.

2. Select Preferences from the Mail menu.

3. Select your account from the left pane of the window and click Server Settings.

4. Select Add server from the Outgoing Mail Server menu

5. In the SMTP Server Options dialog window, type smtp in the Outgoing Mail Server field.

6. Select password from the Authentication menu.

7. Enter your username in the User Name field.

8. Type your password into the Password field.

9. Click OK.

If you're configuring SMTP Authentication for an existing Netscape Mail 6.x or 7.x account, do the following:

1. Open Netscape.

2. Click Mail from the Task menu.

3. Under the Edit menu, click Mail & News Account Settings (in NS 6.X) or Mail & Newsgroups Account Settings. (in NS 7.x)

4. In the left pane of the Account Settings window, select Outgoing Server (SMTP).

5. In the Server Name field, type in smtp.

6. Select User name and password. Enter your user name in the User Name field.

7. Click OK.

Note: You will be prompted for your password when sending a message. Enter your email password in the dialog box. To have Netscape save your password, Select Use Password Manager to remember this password option when prompted for your password.

If you're configuring SMTP Authentication for an existing Thunderbird 1.0 account, do the following:

1. Open Thunderbird.

2. Click Tools in the Tasks menu.

3. In the Account Settings menu, click Outgoing Mail Server.

4. In the right pane of the Outgoing Mail (SMTP) settings window, change Port to 465. The default port is 25.