Yahoo and Earthlink email accounts failing

My Yahoo and Earthlink email addresses started failing. My Exchange email addresses are fine.
I have the manual setup for these and neither automatic nor manual setup work and the “fix” feature doesn’t fix.

Thoughts? Am going to have to stop using em Client if I can’t get these working soon.

Can I try reverting to a previous build of em Client? Where would I find that download?

I should have searched before asking. The old versions are here, Release History | eM Client. Will give it a whirl.

Nope. My Earthlink.net and Yahoo accounts still do not work. Thoughts?

Fixed! NordVPN was preventing both em Client and Thunderbird from adding accounts (I was not using Port 25).