1. Once you have opened your Outlook, click File in the top left corner

  2. Under the heading Account Information, there is a dropdown box where you can select the email account you want to select

  3. Once you have selected the email address, click on Account Settings

  4. You will then see a dropdown of options, click Server Settings

  5. You will then see your IMAP Account Settings, click Outgoing Mail

  6. That will open up your Outgoing Mail Settings

  7. In here, change the port number to 587

  8. In the Encryption Method, change to STARTTLS

  9. Click Next, and you should see that your Account has been successfully updated


  1. Open Outlook Express, and click on Tools. In the Tools menu, select Accounts.

  2. Double click on the email account you wish to amend.

  3. Under the Advance tab, change the Outgoing server (SMTP) port to 587.