Switching to Exchange is not an option for everyone...
This is from http://www.howtogeek.com/99423/email-whats-the-difference-in-pop3-imap-and-excha nge/
Because Exchange and MAPI are Microsoft products, only companies that own their own Exchange mail servers or use Windows Live Hotmail will be able to use Exchange. Many clients, including the default Android mail client and iPhone, are Exchange ActiveSync capable, giving Hotmail users IMAP style cloud-based email, despite Hotmail not offering true IMAP functionality.
I don't use Exchange and there seems to be no way to limit the number of emails besides deleting the account.
Big Sigh