Mail Addon issue

Mail Addon issue

Hi,
I am trying  to make the mail add on feature work without clutter. The issues is that all emails from the contact are being listed in every opportunity that contact is involved in/ linked to. 
I want to filter out the emails that are not relevant to the opportunity. It is ok to have all the mails of a contact under in the contact module. But under the opportunity it shall show only the relevant emails. Is there a way i could do this?
Atleast if I could manually assign or amend the listed emails under the opportunity it would help. Worst case, if I could delete/remove/de-link the irrelevant emails from the opportunities it will save the clutter.