Inbox: Nokia Messaging retains 30 days of email or up to 100 emails (whichever comes first).  Windows Live Hotmail supports 30 days of email or up to 50 emails (whichever comes first).

Sent, Drafts and subfolders: Nokia Messaging retains 30 days of email or up to 50 emails (whichever comes first).  Windows Live Hotmail supports 30 days of email or up to 50 emails (whichever comes first).