generating a mail thread including at least two e mail messages transmitted and received between {HEAD ~ a message originator} and {TAIL ~ at least one recipient} 
generating a mail thread including at least two e mail messages transmitted and received between { HEAD ~ a message originator } and { TAIL ~ at least one recipient }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL