Authentication failure on not secure connection (no gmail) [solved]

Today, on my repaired Motorola e6 plus, I cannot login on my imap account, or better I can login into one, but not into another of my (NOT gmail nor yahoo) email accounts.
I get an autentication error message, but I am sure that imap server, user and password are correct. They work in K9-mail on another smartphone and on my PC.
I think that the problem is secure connection, because, after adding a new account with secure connection, it works: 2 out of 3. The not working is without security.
But, one mont ago, K9-Mail used work perfectly on this my smartphone with this account…

Solved: I removed the account and retyped it. Now it works! :slight_smile: