unable to connect imap

unable to connect imap

I'm trying to configure the new Sales IN Box feature in ZOHO CRM.

I've gone thru all the steps. I've added the SPF and DKIM keys and tested.

I've got the right connection info to my server and account.

When I try to complete the connection the page will say "Authenticating" for quite some time then finally says "Server Disconnect".

I'm lost as to what to do next.

Any help appreciated.

Kerry