MailChimp is a widely used Mailng List delivery and support service.
http://www.mailchimp.com
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Get access to data on 2,984,093 websites that are MailChimp Customers. We know of 971,064 live websites using MailChimp and an additional 2,013,029 sites that used MailChimp historically and 571,968 websites in the United States.
Get a list of 2,984,093 websites using MailChimp which includes location information, hosting data, contact details, 971,064 currently live websites and an additional 1,066,033 domains that redirect to sites in this list. 2,013,029 sites that used this technology previously and 571,968 websites in the United States currently using MailChimp.