Hello, I just subscribed to the ZOHO mail crm add on to integrate with my gmail account. I followed the instructions (and hte video tutorial) but I have the following issue

When I try to send emails to contacts through the CRM interface, I get the following error

"Mail Box (myconfiguredemail@gmail.com) you have configured earlier is not reachable. Please select a new "Mail Box" "

1. I used google to sign into zoho

2. I set up the zohocrm password.

3. My gmail   myconfiguredemail@gmail.com is actually a google apps email.

4. The gmail account was successfully added as a pop account.

5. I can send mails through the mail interface (for the added account) but not through the CRM.

Any help will be appreciated.