you may very well argue that the N900 isn't a flagship device (and i would tend to agree with you) but the point still remains.

in fact, the Nokia flagship device, Nokia N97 (and you cannot deny that handset is a flagship device) still has a rather crap email client. On the Symbian platform, we're just grateful for ProfiMail - without which, we'd be stuck with Nokias extremely antiquated email solution.

again, the point still remains - Nokia make rather lacklustre and feature-less email clients.