I was recently asked to determine why one of our mail domain users was receiving hundreds of bounced messages in their inbox. As it turns out, their address is being spoofed by a spammer. Long story short, we needed to implement an SPF record in our DNS settings. But that’s not what I found interesting.
In researching SPF records and the history of spam, I came across this article that claims the first spam message was sent via Western Union telegram way back in May of 1864. Wow!