{HEAD ~ The timestamp} may represent, for example, the actual creation time, the time a message is received by {TAIL ~ an electronic message service} for delivery, or any combination thereof 
{ HEAD ~ The timestamp } may represent , for example , the actual creation time , the time a message is received by { TAIL ~ an electronic message service } for delivery , or any combination thereof
HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH