imapsync from Zoho not working

imapsync from Zoho not working

Hi I'm trying to transfer emails from Zoho using imapsync; IMAP access is enabled for target source user; source host and port are correct (tried with both imap.zoho.com and imappro.zoho.com with SSL ports); source password is correct; imapsync cannot connect to source IMAP server; please fix, thank you