# Resources

## SPF, DKIM, and DMARC mail protection

- https://www.digitalocean.com/community/tutorials/how-to-use-an-spf-record-to-prevent-spoofing-improve-e-mail-reliability
- https://www.linuxbabe.com/mail-server/setting-up-dkim-and-spf
  - says to use `@` for subdomain, but Dyn only accepts `*` as wildcard
- https://www.digitalocean.com/community/tutorials/how-to-install-and-configure-dkim-with-postfix-on-debian-wheezy
- https://www.linuxbabe.com/mail-server/create-dmarc-record
- https://www.rackaid.com/blog/email-dns-records/
- https://www.skelleton.net/2015/03/21/how-to-eliminate-spam-and-protect-your-name-with-dmarc/
- https://seanthegeek.net/459/demystifying-dmarc/

## Best Practices

- https://bridge.grumpy-troll.org/2020/07/small-mailserver-bcp/