I followed the steps identified here: 

https://www.zoho.com/crm/help/zoho-mail/configure-gmail-account.html 

to associate a new gmail account to my (still free) zoho account, but every time I click the TEST ACCOUNT button, I get the below error:

[AUTH] Web login required: https://support.google.com/mail/answer/78754 Is there any changes to the POP gmail servers? Cheers Alfredo