I figured out how DMARC works, and it almost broke me | Simon Andrews
simonandrews.ca/articles/how-to-set-up-spf-dkim-dmarcHow to use SPF, DKIM, and DMARC to improve your domain's email security and limit spoofing - but written for humans.
Temp Mail - Disposable Temporary Email
temp-mail.org/Keep spam out of your mail and stay safe - just use a disposable temporary email address! Protect your personal email address from spam with Temp-mail
What the World's Worst Email Spammers Might Look Like | WIRED
wired.com/2014/12/cristina-de-middel-poly-spam/Cristina de Middel / Poly-Spam