CSS and Email, Kissing in a Tree

Despite prevailing wisdom to the contrary, you can safely deploy HTML emails styled with good old-fashioned CSS. If you're not content to roll over and use font tags in your HTML emails, read on.

Wyner, Mark. List Apart, A (2004). Design>Web Design>CSS>Email

Email Newsletters Pick Up Where Websites Leave Off

Users have highly emotional reactions to newsletters which feel much more personal than websites. In usability testing, success rates were high for subscribe and unsubscribe tasks, but users were frustrated by newsletters that demanded too much of their time.

Nielsen, Jakob. Alertbox (2002). Design>Web Design>Email>Newsletters

Graceful E-Mail Obfuscation

Most e-mail obfuscation techniques I've tried tend to be bothersome and time-consuming to implement because they have to be applied to each and every e-mail address that you want to protect. Most require you to use lengthy inline script elements and inline event handlers. They may also invalidate your markup.

Van Gils, Roel. List Apart, A (2007). Design>Web Design>Privacy>Email

Transactional Email and Confirmation Messages

Automated email can improve customer service, strengthen relationships, and help websites bypass search engines. But most messages fared poorly in user testing and didn't fulfill this potential.

Nielsen, Jakob. Alertbox (2008). Articles>Web Design>Usability>Email