I've tested every service on the list and I vote for Elastic Email.
Why isn't postmark in the comparison?
Thanks for great matrix. Have you got any comparison on SMTP.COM?
After going through send grid, mailjet, now happiest with mandrillapp
Although there is no telephone support, the support we have received has been excellent.
Logiciel très bien conçu et pratique avec des rapports de réception très détaillés.