I like WP Defender a lot-- it's got a great interface, is easy to use, and helped me find some themes with vulnerabilities that I wouldn't have thought of. However, it has emailed me multiple times in a day over an issue that I chose to ignore (and still shows up as ignored in the Dashboard). I have another plugin from another source that has a file that verified it is purchased; it shows up as an "unknown file in WordPress Core" but I keep getting pestered about it even after saying "ignore" once!
Sometimes these emails are only 2-5 hours apart, when I only wanted them weekly! How can I stop it from inundating me with these emails?!