Abuse reports form a foundational part of internet infrastructure. The ability
to get in contact with a person responsible for IP address routing or machines
involved in an ongoing attack in a timely manner is critical for internet
stability and operational security.

Sadly, some junior administrators have decided that standard internet
background noise constitutes critical abuse behavior and automates sending
abuse emails in response. This floods abuse inboxes and makes the global abuse
reporting system less real time and, thus, less able to respond to actual
attacks.

Worse, these automated abuse senders rarely respond to follow-up or requests
for more information, making it clear they don't actually care about the
"abuse", they just want to send spam.

To combat this, we completely block any automated abuse senders after several
attempts to reach out and resolve the issue if we receive no response. Further,
we block all messages coming from common auto-mailers. The two files in this
directory are regex lists compatible with postfix's `header_checks` and
`body_checks` configuration options, and should block most spammers who hit
abuse inboxes.