At work I use Microsot Outlook 2007 and I think it is a very good email client but It has one big flaw and it is that its database file starts giving trouble after reaching certain size (around 2 GB). This is a shared problem with earlier Outlook versions but I think it is solved on Outlook 2010 and Outlook 2013. At home I don't use any email client because I check all my mails through gmail's web interface. What client do you use? Have you had any good or bad experience you care to share with the rest of us?