I have used cakemail for the last year or so, and it's excellent. Very easy to customize for your business, has many features, and great customer support! Not much really, other than that it solves all of our needs - send out newsletters via email, respond to emails for customers with ease, the contact manager works very well. We haven't been able to find anything negative at this point. It is not cheap though, we currently pay about $20 a month per user (we have four), but it solves all ourβ¦