User:Maslen/Books/Email Security

Sender authentication

 * Open mail relay
 * Sender Policy Framework
 * DomainKeys Identified Mail
 * DMARC
 * MTA-STS
 * For MTA STS, also see https://www.hardenize.com/blog/mta-sts

Encryption

 * GNU Privacy Guard (GPG)
 * Pretty Good Privacy (PGP)
 * S/MIME

Details

 * Sender Rewriting Scheme
 * Email tracking

Ways to analyze email heades:
 * Security analysis (SPF/DKIM/DMARC/etc.)
 * Latency analysis

Tools for Analyzing SMTP Headers:
 * https://toolbox.googleapps.com/apps/messageheader/
 * https://www.arclab.com/en/kb/email/how-to-read-and-analyze-the-email-header-fields-spf-dkim.html
 * https://www.whatismyip.com/email-header-analyzer/
 * https://mediatemple.net/community/products/dv/204643950/understanding-an-email-header
 * https://www.cnet.com/how-to/how-to-analyze-e-mail-headers-the-easy-way/