cannot connect to zoho mail via imap or pop

EM Client will not connect to my business account hosted by Zoho Mail in either imap or pop 3. I am certain I am using the correct settings because I am able to connect with no problem when using Mailbird. The error message reads an attempt to connect to ravi@american100.com failed. This could be caused by temporary server unavailability or incorrect settings. The fact that it works via Mailbird confirms that the server is up and running and settings are correct. I am running Avast antivirus and disabled the email protection feature. I have deleted the accounts and retried several times. Even when I use the diagnose and fix features and everything seems kosher, I still receive the error message shown below and nothing is downloaded into the client.  Please advise

Hi Ravi, how did you setup the account, did you use the automatic setup?
When the error occurs, can you please switch to the “Log” tab, copy the content of the log and post it here on the forum, there should be a detailed error included in the Log.

Also what version of eM Client are you currently using?

Thank you,
Paul.