Originally Posted by FroogleThis
Make sure that in the gmail webpage, under settings, Email & POP Forwarding are enabled and that Archive Gmail's Copy are selected. On your BIS page, make sure a copy is not being sent to the handheld.
I had pop enabled and archive set.
Only way I have found round this for some really odd reason is to create a rule on my BIS that says if the 'From' field = my address then do not forward. Early tests have worked.