Is there an add-emails feature, like Bcc Dropbox feature, without having to send an email to a contact?

Is there an add-emails feature, like Bcc Dropbox feature, without having to send an email to a contact?

We're new to Zoho, so maybe we just need training?  Bcc Dropbox is great, but I can't find any way to add an incoming email to a contact record without responding to the incoming email and Bccing.  It's frustrating not being able to go back in time and add important emails to our contact records.  No offense, but SalesForce has an "Add Email" button, so where's your button?  Help!