I like that it blocks emails from unknown senders as well! It can be useful to have an email blocker for when you are in school or at work so your inbox isn't filled with unwanted messages (and possibly viruses). Sometimes there is no option of unblocking certain websites/emails which could get annoying if they keep coming back up again after being blocked once but this doesn’t happen very often thankfully since my internet provider has good filtering options already set by default anyway. The app itself seems quite easy enough although sometimes does take some time before blocking new items - not sure why though? If someone wants something lightweight then maybe try out another free program first such as Better Email Protection instead just incase anything goes wrong with clearmymail later down the line because we use their service every day without any problems thus far!!