ScreenCastsOnline published a video tutorial. It takes a look at alternative email clients for Mac if Apple Mail isn’t going to cut it for you anymore. One of them is Mailplane.
ScreenCastsOnline is a membership based service. Their video can be accessed by anyone who has signed up for a no-obligation free trial membership. Or you can also download SCO Showcase for iOS if you like to purchase a copy of the full tutorial without having to take out a membership.