There is always a catch, what is the catch?
No catch I promise! I may sound like I work for Mandrill but my enthusiasm is based solely on using Mandrill now on 4 separate projects and having great success on all of them. Best of all Mandrill is free (now I have your attention!). With a free account you are given a starting limit of 12,000 Emails per month, with an hourly limit of 250.