Associating ALL emails without having to manually associate with Gmail add-on

Associating ALL emails without having to manually associate with Gmail add-on

We are new to Zoho and I'm not having any luck searching for an answer.  I am able to associate individual emails manually using our Gmail add-on.  Is there a way to automatically associate the emails to contacts?  I have a chain of emails with a client, but only those that I have manually associated appear in their record.  Any help would be greatly appreciated. Thanks!