Unified Rendering of Email Standard (URES)

This document specifies requirements for the uniform rendering of HTML email content across mail user agents (MUAs). It addresses critical inconsistencies in how email clients interpret HTML and CSS, including dark mode adaptation, embedded asset handling, positioning constraints, and secure SVG rendering. The specification aims to eliminate the current fragmentation in email rendering while maintaining backwards compatibility with existing MIME standards (RFCs 2045-2049) and the Internet Message Format (RFC 5322).