Rated 4 out of 5 stars

There are some nice features here for folks who don't mind taking the time to manage their email client. It's like remembering to change the oil in your car, it just needs to be done on occasion - especially if you've got emails going back more than a decade.

I especially like the ability to check for bad email addresses in the address book. Unfortunately if you have a large number of email addresses you'll get greylisted pretty quickly and that makes checking your list useless after a point. If ThunderPlunger had a feature where you could check a selected block of accounts at a time, it would be more manageable and certainly more useful to me.