Tracking conversations

Hi,

Is it possible to set SD+ to automatically track email replies from customers to a request into the conversations part of the request within the ticket? - in a similar fashion to the way in which it tracks any emails sent from within the request ticket.

Also I do not really want people to be able to raise a request automatically by email, is there a way in which this can be stopped without affecting the other incoming emails?

For Information;

I have attempted to do this by enabling the mail fetching and trying a spam filter with the following conditions;

subject does not contain "Request ID No"

Where "Request ID No" is not a variable but a string that is in the subject line of every auto-notification sent from SD+

Any Help apprcieated!!!

Cheers
James