What is the enhancement in mind? How should it look and feel?

Is it possible to have another checkbox with the grab checkboxes (Item & Money) to automatically accept mail with COD (unchecked by default). Because if someone know that a user of you addon use it regularly, it is very easy for him to send to this same user anything for 1000 po knowingly that your addon with the "grab all" button wil accept the COD mail and pay the 1000 po :/

Please provide any additional information below.

I have tried to do it myself but I must confess my incapacity to edit the XML to change the interface. But I have patched the current code to not automatically accept mail with COD.
For this effect, I have updated the functions DMAMail_QueueGrabAll and DMAMail_QueueGrabSender by changing
  if(hasItem ~= nil) then
by
  if(hasItem ~= nil) and (CODAmount == 0) then