To change the outgoing mail server port in Outlook, do the following:
- From the Tools menu select "Account Settings..."
- From the E-mail tab, double click on the email account that you want to change the outgoing server (SMTP) port on.
- Click on the "More Settings" button.
- Click on the Advanced tab and change the "Outgoing server (SMTP)" setting to 2525:
- Click OK and you're done.