If you already blog on a regular (or at least somewhat regular) basis, you can turn your blog posts into a email newsletter automatically whenever you update your blog. Did we mention that the process is automatic?! It is called RSS-to-Email.
Viewing entries tagged
We use MailChimp. Recently, they sent an article about how certain email design traits can get you blacklisted. MailChimp did an experiment using human reviewers to determine if they perceived an email as spam, simply based on design.