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 859,771 websites that are Mailgun Customers. We know of 503,685 live websites using Mailgun and an additional 356,086 sites that used Mailgun historically and 259,948 websites in the United States.
Get a list of 859,771 websites using Mailgun which includes location information, hosting data, contact details, 503,685 currently live websites and an additional 938,641 domains that redirect to sites in this list. 356,086 sites that used this technology previously and 259,948 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.