“Email”
HTML5 vs XHTML 1.0
Which Doctype Should You Use in HTML Email?
Interactive email using SVG and SMIL
Typographic Patterns in Email
Typographic Patterns In HTML Email Newsletter Design
— Smashing Magazine
The Ultimate Guide to Web Fonts in Email
CSS Support Guide for Email Clients | Campaign Monitor
The All-New Guide to CSS Support in Email
– Campaign Monitor
Authenticating Email Using DKIM and ARC
or How We Analyzed the Kasowitz Emails - ProPublica