I had never explored Mandrill, thanks.
SES is still the cheapest (especially when scaling up) and extremely fast from my experience with it.
Here is a good article I found about SES and competitors such as Mandrill: http://www.ventureharbour.com/transactional-email-service-be...
Re:Amazon, a Friendly Giant as Long as It’s Fed
by wavefunction on Sunday July 13, 2014 @11:28PM
(#8029412)
The difference betwen SES and Mandrill? With Mandrill you'll be patronizing a great company with some fantastic folks.
(First used MailChimp in 2003 and they've always been the bomb.)
Before 2012 (when they launched Mandrill) MailChimp used Amazon SES. http://us1.campaign-archive1.com/?u=f7b9ee22124ff6454424dc10...
The Mandrill service is nice, I agree.
Also, MailChimp has a very cool 404 page: http://kb.mailchimp.com/article/transactional-reports-overvi...
sendgrid is like 5 years old: http://sendgrid.com/
mailchimp's version: http://mandrill.com/
rackspace: http://www.mailgun.com/
also: https://postmarkapp.com/