- Open Mail on your Mac.
- Click on the Mail option in the menu to the top left of the screen, then click on Preferences!
- Select the Server Settings tab, and disable the “Automatically manage connection settings” option under the Incoming and Outgoing Mail Server Settings.
- If you see that the Incoming and Outgoing Server addresses are set to the server’s address (e.g., “c1s1-1e-syd.hosting-services.net.au”), please change the address to “mail.your-domain-here.com” (replacing “your-domain-here.com” with your domain name).
- Under Incoming Mail Server, change the Port number to 993 for IMAP or 995 for POP. And ensure User TLS/SSL is enabled.
- Under Outgoing Mail Server, change the Port number to 465. And ensure User TLS/SSL is enabled.
- Click Save.