Yep i am getting the same results on the Dell Streak. I have three accounts and Hotmail is the only one that keeps downloading.
I am using Enhanced Email, have incoming server set to "delete from server" when I delete from the phone. Still retrieves the same emails moments later.
Logged onto live.com and set the preferences (there's two radio buttons) to delete from server when deleting from the phone or other applications...
......still not happening....
I have to log onto live.com and mass delete from there so that they do not show up on the phone. Seems like eitehr live.com isnt recognizing an external delete or live.com isnt saving the settings.
This isnt the case with a yahoo.com, my gmail.com and a home dsl email account. These three immediately delete from server as expected.
(lunatic: your avatar is the bomb!)