The Check for new mail at startup, only checks the server to see if there is new mail, it does not download the mail unless the "Automatically download new mail" preference is checked. This preference is a subset of "Check new mail every X seconds" though, and should not affect the new mail check at startup. Noticed this in 6.1, but also seeing this in 2001081504.
opps this is actually a dup of 94671 But this is new info, added info into 94671 *** This bug has been marked as a duplicate of 94671 ***
verified as dup