title: How to link Leads (emails) to Marketing emails sent in Odoo v8?
body: <p>I have Leads and all my leads have emails set. Now I have sent emails to leads with "Mass Mailings" from "Marketing". But now when I click on my lead I do not see any link between the Lead (email) to emails I have sent with "Mass Mailings". </p>
  
  <p>Is there a way to make a link between Lead (email) to email I have sent?</p>