HINT - Sending Email with Mandrill (free or paid) | Mar 2014
MailChimp has spun off their API to http://mandrill.com
Free account limited to 25 emails per hour, until trusted. 12,000 per month.
Digital Fusion has a FMP/Mandrill tutorial and demo file - http://teamdf.com/weetbicks/sending-e-mail-from-filemaker-using-mandrill/224/
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.