MailChimp, an emerging web service for sending and tracking your email marketing to customers, has released a great 50 page guide to email marketing. * Designing HTML emails that work in all the major email programs * CSS and coding tips and tricks * Common email marketing mistakes to avoid * How to avoid spam filters and prevent abuse reports * Spam laws, blacklists, and best practices * Managing permission email lists * Email marketing etiquette for beginners Download PDF Guide (1.2 MB) http://www.mailchimp.com/resources/html_email_design.pdf
Looks great Don't know if they will break this almost stale market to be honest. Their price plan looks complicated.