This document discusses common email attacks and measures to enhance email security. It outlines five main types of email attacks: phishing, malware, man-in-the-middle attacks, denial of service attacks, and account takeovers. It then describes Skiff, an email service that offers end-to-end encryption and enhanced resistance against these and other attacks like impersonation and brute force attempts. Skiff implements advanced security while maintaining transparency through open-source implementation and public documentation of its encryption and system design.