This site has an SPF record for MailChimp managed email sending.
https://mailchimp.com
Email Hosting Providers · Campaign Management
Get access to data on 810,072 websites that are MailChimp SPF Customers. We know of 434,685 live websites using MailChimp SPF and an additional 375,387 sites that used MailChimp SPF historically and 199,326 websites in the United States.
MailChimp SPF websites that are also using other technologies.
Get a list of 810,072 websites using MailChimp SPF which includes location information, hosting data, contact details, 434,685 currently live websites and an additional 1,004,357 domains that redirect to sites in this list. 375,387 sites that used this technology previouslyand 199,326 websites in the United States currently using MailChimp SPF.
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