Following are the steps to enable Zoho Mail account setting
Login to Your ZOHO Mail Account : http://www.zoho.com/mail/login.html
Step 2: Go to Settings icons on the right side panel.
Step 3. Then Go to Mail Account: https://mail.zoho.com/zm/#settings/all/mailaccounts
Step 4. Then Select IMAP & Check "Enable IMAP Acess" option