People love the familiar Gmail interface, but using Gmail with your own domain isn’t free, and resorting to firstname.lastname@example.org isn’t very professional. For a long-term solution, I recommend signing up for Google for Nonprofits. It’s free and made to handle enterprise-level IT needs. I can even send you a spreadsheet to tell you if you’re eligible.
UPDATE: The Kinder, Gentler HTML Framework is now the Vanilla Framework, updated and greatly improved. Read about at the Github repository, here. As many of my coding colleagues know, writing HTML for emails is a frustrating process. Web developers get to play with a myriad of frameworks, snippets and themes, while we in email land are