iPhone incoming email not working

iOs 16. iPhone 2020 SE

I have two mail accounts with the same @. I configured them with the same incoming server name and password. One works and one doesn't. On the one that doesn't, the error alert is:

Cannot Get Mail

Server is not responding. Verify that you have entered the correct account info in Mail settings.

Thinking maybe the settings were corrupt, I configured a new account. On this new account, the error alert is:

No password provided.

But I typed in the password for both incoming and outgoing. I re-typed the password in both fields. I still get that "no password" alert.

I have CAREFULLY retyped the settings. It still doesn't work.

With both of those accounts, the outgoing email functions perfectly.

Any ideas?