Setting up Outlook to send through SMTP on port 587

Many ISPs are now blocking port 25 outbound from end users to prevent spam from their network. A new standard is to use port 587 and setup Plesk to listen on port 587.

To setup Outlook to do this

1. Open Outlook.
2. Tools -> Accounts
3. go to the “Mail” tab.
4. select the account and click “Properties”.
5. Go to the “Advanced” Tab in the new window.
6. Set the “Outgoing mail (SMTP)” option to 587 from 25. Hit “Ok”.

Outlook should now use port 587 for sending mail.