Travelport e-mails can display obsolete information!
For an upcoming trip we had Tauck make our flight reservations. Tauck sends us an air itinerary that they generate. Following that, we also get an e-mail from Travelport. Recently we changed seat assignments, Tauck sent a new itinerary, and a few days later we got an e-mail from Travelport. I didn't pay too much attention but my wife was looking on line at the Delta website and our flights had changed. The Travelport e-mail displayed our old flights but when I clicked on the green bar that says "View your itinerary" the new, different, updated itinerary came up. (Flight 3696 shown on the screenprint was replaced by a different flight number, 2 hours earlier.) If we hadn't caught this, we would have shown up at the airport just as our flight left!