I recently switched from MS Outlook for email to Mozilla Thunderbird. The reason I switched might seem trivial, but I'm glad I did. I have six email addresses I use on IMAP servers. I got tired of the 15 to 20 second delay that Outlook would use when polling the servers and downloading emails. Downloading messages......Send/Receive status 15%.....Send/Receive status 25%...Send/Receive status 40%.....Send/Receive status 42%.......Send/Receive status 56% ..you get the idea. Thunderbird instantly shows me my emails and I like the layout and GUI much better than Outlook. There are some functions that Outlook has built in (calendar, tasks) that you have to download an add-on in Thunderbird and there is a very slight learning curve with Thunderbird, but I've been using it for about a week and I'll never go back to Outlook. BTW, Thunderbird is a free download as are the add-ons. Anyone else using Thunderbird? Thoughts?