Email replies opening tickets

Email replies opening tickets

Currently we are in the first month of starting to use Service Desk Plus. When any email hits our service desk a new request is opened and a reply is sent to the requester. We don't wish for replies to previous requests to open a new request. I have found a way using the SPAM settings to completely prevent replies from opening new requests. We need a solution where a reply does not open a brand new request.
 
What is happening:
 
Tommy emails  the servicedesk and other people are in the discussion. A conversation is underway and the service desk is being included. For each email sent a new request is opened.
 
What we want to happen:
 
Each response is merged within the original request.
 
or
 
Each response is injected in the description field.
 
Thanks for any input or ideas.
 
Damion

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