Cannot connect with IMAP nor SMTP

Cannot connect with IMAP nor SMTP

I had Zoho mail successfully running for a couple months via IMAP clients (Mac Mail and my iPhone) and then suddenly it stopped being able to connect to the server on both clients.

I tried changing the password multiple times, i reset the password multiple times, and it simply wont connect.  The error message is saying that the username and password are not correct, but I am still able to log in to the webmail so the password is correct.  I have SSL enabled, I have ports 993 and 465 selected, username is my full email address.

The mystery is that I didn't change anything and it stopped working.  both incoming (IMAP) and outgoing (SMTP) stopped working on both my computer and my iphone at the same time.  I even tried setting up an account with Outlook but get a similar error.

Please help.