You wrote "That is only half the answer. 11:55 is when you received it, not when it was sent"
I wondereded about that also. So I sent myself an email though my painfully slow work email system. I sent it and received it 12 minutes later. My hotmail account shows Time Sent and it was accurate with the time sent not the time received.
Another note: the email I received from Globetel yesterday had the December 7 date and not the December 5 date which shows there were 2 different mailings.