Mandrill is an email infrastructure service. Detailed analytics offer insight to measure email performance.
http://mandrill.com/
Email Hosting Providers · Transactional Email
Get access to data on 1,086,058 websites that are Mandrill Customers. We know of 297,317 live websites using Mandrill and an additional 788,741 sites that used Mandrill historically and 117,131 websites in the United States.
Get a list of 1,086,058 websites using Mandrill which includes location information, hosting data, contact details, 297,317 currently live websites and an additional 629,746 domains that redirect to sites in this list. 788,741 sites that used this technology previously and 117,131 websites in the United States currently using Mandrill.