MailChimp is a widely used Mailng List delivery and support service.
http://www.mailchimp.com
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Get access to data on 3,157,919 websites that are MailChimp Customers. We know of 988,330 live websites using MailChimp and an additional 2,169,589 sites that used MailChimp historically and 581,569 websites in the United States.
Get a list of 3,157,919 websites using MailChimp which includes location information, hosting data, contact details, 988,330 currently live websites and an additional 1,267,002 domains that redirect to sites in this list. 2,169,589 sites that used this technology previously and 581,569 websites in the United States currently using MailChimp.