1234, You posted this question in the wrong forum (Band Aide instead of PhotoMechanic). I have not seen your problem at all, but it could be something that is in fact caused by entourage and not PM. I don't use entourage, nor do I frequently use PM to send photos via mail, so I can't really help you further.
If you repost your question in the Photo Mechanic forum, I'm sure you'll get some better answers.
Cheers,
Hayo