Mailgun is a set of APIs that allow you to send, receive, track and store email effortlessly.
https://www.mailgun.com/
Email Hosting Providers · Transactional Email
Get access to data on 898,926 websites Mailgun Customers. We know of 536,348 live websites using Mailgun and an additional 362,578 sites that used Mailgun historically and 277,853 websites in the United States.
Get a list of 898,926 websites using Mailgun which includes location information, hosting data, contact details, 536,348 currently live websites and an additional 985,652 domains that redirect to sites in this list. 362,578 sites that used this technology previouslyand 277,853 websites in the United States currently using Mailgun.
Countries
Financial
Group
Region
These are sites that we think might use Mailgun in the future because of their similarity to other sites that already do.