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 1,040,457 websites that are Mandrill Customers. We know of 667,926 live websites using Mandrill and an additional 372,531 sites that used Mandrill historically and 225,963 websites in the United States.
Get a list of 1,040,457 websites using Mandrill which includes location information, hosting data, contact details, 667,926 currently live websites and an additional 642,117 domains that redirect to sites in this list. 372,531 sites that used this technology previously and 225,963 websites in the United States currently using Mandrill.