To set up your Apple Mail 3.0 client to work with your OpenSRS Email:

1. Open Apple Mail.
2. Click Mail, and select Preferences...
3. Open the Accounts tab and select your existing  account in the left panel.
4. Change the Incoming Mail Server to: mail.your_domain.com
5. At the bottom of the right panel click the arrow to the right of Outgoing Mail Server (SMTP) and click “Edit SMTP Server List …” from the dropdown.
6. Under Account information please enter the Server Name as: mail.your_domain.com
7. Click the Advanced tab
8. Verify Use default port (25, 465, 587) is selected
9. If you get an error, or have issues sending, please change to “Use custom port:” and set to 587
10. Uncheck Use Secure Sockets Layer (SSL)
11. Click OK
12. On the Account page select the Advanced tab
13. Enter 110 in the Port field
14. Uncheck Use SSL
15. Verify Authentication is set to Password
16. Close the window to save