MailChimp Add-On For ACT! is the leader of the Email Marketing and Email List Manager market and you can now integrate their services with Sage ACT! 2011 or 2012.

With an intuitive and modern interface, tons of Email templates, unmatched features whether for segmenting, tracking, follow-up purposes, MailChimp is the Email service to use for small and big business owners. There is even a very generous free plan allowing you to send up to 12,000 emails a month (to a maximum 2,000 subscribers).

Be aware though that the company policies on spam are very strict and make sure you fully understand their requirements in that regard.