Really Good Emails (RGE) collects all the good things e-mail design can do for marketing. RGE curates all kinds of emails, like newsletters, product emails, password reset emails etc. They have “really good” examples for about every kind of email out there.
Matthew Smith made this website once as an experiment and built it in a 30 hour window using WordPress. RGE was launched on March 25 2014 and has been used as a resource by thousands of marketeers since.