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 1,000,655 websites that are Mandrill Customers. We know of 619,309 live websites using Mandrill and an additional 381,346 sites that used Mandrill historically and 220,601 websites in the United States.
Get a list of 1,000,655 websites using Mandrill which includes location information, hosting data, contact details, 619,309 currently live websites and 381,346 sites that used this technology previously and 220,601 websites in the United States currently using Mandrill.