Mail on macOS High Sierra no longer connects to server

Question

Level 1

8 points

Mail on macOS High Sierra no longer connects to server

Mail on my Mac mini suddenly stopped connecting to any mail server (iCloud, Yahoo!, et al). Calendar and other apps connect to iCloud just fine. The failure is isolated to mail but for all mail server accounts.

I've deleted and recreated the accounts to no avail. Does anyone have a fix?

Mac mini, macOS 10.13

Posted on Nov 11, 2019 2:26 PM

Reply

Answer 1

Best reply

rsh5280 Author

Level 1

8 points

Nov 15, 2019 12:52 PM in response to BDAqua

Thank you, that worked. Initially test messages I sent got hung up in my outbox but I then adjusted the outgoing server and all seems to be working properly. I appreciate your help.

Do you have any thoughts as to what caused this?

Reply

Answer 2

BDAqua

Level 10

239,393 points

Nov 14, 2019 3:26 PM in response to rsh5280

Ok, getting to 17. anything means it's getting to Apple, so we know reaching them is not the problem.

Make a New Location, Using network locations in Mac OS X ...

http://support.apple.com/kb/HT2712

 System Preferences>Network, top of window>Locations>Edit Locations, little plus icon, give it a name.

System Preferences>Network, click on the little gear at the bottom next to the + & - icons, (unlock lock first if locked), choose Set Service Order.

The interface that connects to the Internet should be dragged to the top of the list.

 If using Wifi, instead of joining your Network from the list, click the WiFi icon at the top, and click join other network. Fill in everything as needed.

System Preferences>Network>choose interface>Advanced>Proxies Tab, make sure none are set, like for HTTP & HTTPS.

System Preferences>Network, unlock the lock if need be, highlight the Interface you use to connect to Internet, click on the advanced button, click on the DNS tab, click on the little plus icon, then add these numbers...

8.8.8.8

8.8.4.4

1.1.1.1

9.9.9.9

Apply.

Reply