Send large files to people for free.
It’s easy to design an amazing looking email marketing campaign, and completely screw it up.
Gmail extension for rich contact profiles. Just try it out and you will dig it.
Great site for best practices and tutorials around email development.
Free API to instantly check the spam score of email messages.
Inspired by HTML5 Boilerplate, this site is all about a starting point for best practices in html email development and production.
Great guide about how to create beautiful html email designs that avoid pitfalls and follow best practices.
Great collection of well-designed HTML emails.
How To Access Secret Features
Did you know there are a whole bunch of features for gmail that are in development, but that you can use right now? Just go to the labs tab in your gmail settings. Background Send, Custom Defaults, Docs Integration, Undo Send, Canned Responses and more.
How To Be A Gmail Power User
Tips from Google’s Gmail Product Manager
Send Later from Gmail
Plugin for Firefox and Chrome
By creating a separate set of styles to be used by devices that recognize the @media query, you can optimize your emails in a similar fashion to how web pages are being optimized for the mobile today. Devices that don’t recognize @media will degrade gracefully by simply reverting to your default styles.