- Preferences -
Open up your Mail program. In the upper right hand corner select Mail and then Preferences
- Accounts Tab -
Go to the Accounts tab and click on the dropdown for Outgoing Mail Server (SMTP):
- Edit List -
Choose Edit SMTP Server List...
- Advanced Tab -
If you have more then one account in here, choose the account you want to edit and then click on the Advanced tab.
- Make Changes -
Your should now see a section where you can make changes to your outgoing mail server. Click OK when done.