Why am I receiving bounces to messages (maybe spams) I didn send?
An interesting quirk of Internet email is that it’s possible to send a message “From:” any email address imaginable. When email was invented in the early 1980s, there were few concerns about the security and authenticity of email messages, and that legacy is with us to this day. In fact, it’s so easy to do this, even with normal email programs, that you can use it to play practical jokes — were you to go into your email account properties right now, change your email address there to “president@whitehouse.gov”, and send a message to a friend, they would think they’d received a message from the president of the USA. Unfortunately, this technique can be abused by viruses and spammers, at which point it becomes tremendously irritating instead of funny. Spammers often send their junk mail “From:” addresses in other people’s domains to confuse the recipients and hide their true source from anti-spam systems. And spammers have a habit of carelessly sending their junk messages to thousands o
