email communications




subject line


	[cancel request]original subject line		subject line and body text to be
							exactly the same as the email being
							cancelled





	security



1.
		[comms token: A5B5CFE5, from: addr@xz,com, to: addr2@asd.com, new_token]	



		random key

		to be included in exchanges between those two parties


		

2.

		new email message, total sent to that recipient including the message itself


		[comms token: A5B5CFE5, sent_since_new_token: 32]subject line

			body text




		check for out-of-sequence messages
