Legitimate mailers need to distinguish themselves from spammers. One important piece of that is knowing what spammers do. SendGrid has put together some information on common scams and techniques spammers use to get email delivered.

Some of these terms, like doxxing and swatting, are not specifically email related. However, they are used against people who are fighting abuse on the Internet. People who are actively investigating darker portions of the internet face real danger. Brian Krebs has made some of the harassment he’s received public. I know other people in the space have been harassed but don’t make it so public.

I think it’s valuable for marketers to understand the malicious and criminal end of mail. It makes some filtering decisions less random when you know the types of bad traffic that the filters are trying to stop. The SendGrid document is a fantastic first stop to learn about them.