From CIT Wiki
Verify that your outgoing mailserver settings are correct
- Open Mail.
- From the Mail menu, select Preferences. Select Accounts.
- Under the Account Information tab, make sure the Outgoing Mail Server (SMTP) is set to mail.oberlin.edu
- Click on the Server Settings button.
- Check the Use Secure Sockets Layer (SSL) box. Under Authentication, select Password.
- Enter your email User Name. DO NOT enter your password. (Entering your password creates a security risk.)
- Click OK.
- Select the Advanced tab. Make sure the Use SSL box is checked and that the Port is 993.
- Close the Preferences window, and Save any changes you made.

