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Enable SMTP Authentication for Outlook 2003/2007

This article is here for legacy purpose. Outlook 2003 and 2007 are not supported anymore.

Enabling SMTP authentication

  1. Open Outlook 2003/2007
  2. From the Tools menu select Account Settings. The Account Settings box appears.
  3. Verify that the E-mail tab is selected. Your email account appears, it might be labeled or (Replace with the correct domain or Plesk server name)
  4. Click on the account to highlight it, and click on the Change icon above it. The Internet E-mail Settings appear.
  5. Under the Server Information section, in the box marked Outgoing mail server (SMTP) check that it is set to your HIS server name, i.e.
  6. Click the button More Settings... in the lower right-hand corner. The Internet Email Settings box appears.
  7. Click on the tab Outgoing Server.
  8. Check the box My outgoing server (SMTP) requires authentication, and verify that the box Use same settings as my incoming mail server is selected.
  9. Click the Advanced tab
  10. Change the Outgoing server (SMTP) from 25 to 587 with TLS (or 465 with SSL)*.
  11. Click OK to close the Internet Email Settings box.
  12. Click the Finish button to close the Internet E-mail Settings box. Click the Close button to close the Account Settings box.  SMTP authentication has now been enabled.

Note: An increasing number of cable and DSL providers (Comcast, Cox, Roadrunner, Verizon, etc...) are blocking the default SMTP port 25 except for their own mail servers. This is being done to help reduce the amount of spam sent from infected customer PCs.
Symptoms: you get an error sending mail, saying "could not connect to".
Solution:In order to send email through your HIS mail server from your cable/DSL account you will need to use the server name i.e. and port 465 if using SSL/TLS).

Properties ID: 000185   Views: 5135   Updated: 4 years ago