Rated 5 out of 5 stars
I have multiple accounts, some of which I've had for more than 20 years and thus tend to collect a lot of spam. I have a lot of rules defined to dump the spam into a spam folder, but clean up used to be a pain. Xpunge is a great way to quickly and easily clean out spam, empty the trash, and compress my folders all at the click of a single button.
I highly recommend this plugin as a great way to easily manage your email complexity.