Zoho mail in CRM

Zoho mail in CRM

I had a email tab in the CRM at one time, and  I can't get it back.  I also can't get a email to record in Zoho CRM when I click the hyperlink in the contact. If I scroll down and hit the Send email button, it uses Zoho mail, but does not send anything; although it does record it. I have something messed up and I can't figure it out.