I don't think I have any HTML emails that require more than web 2.0 stylings, which isn't really much more than lynx would support, plus images. Its not clear

I don't think I have any HTML emails that require more than web 2.0 stylings, which isn't really much more than lynx would support, plus images. Its not clear to me you need anything resembling a modern web browser to render HTML emails. Do they even commonly use HTML5 features?