This site has an SPF record for MailChimp managed email sending.
https://mailchimp.com
Email Hosting Providers · Campaign Management
Get access to data on 808,049 websites that are MailChimp SPF Customers. We know of 436,619 live websites using MailChimp SPF and an additional 371,430 sites that used MailChimp SPF historically and 198,883 websites in the United States.
MailChimp SPF websites that are also using other technologies.
Get a list of 808,049 websites using MailChimp SPF which includes location information, hosting data, contact details, 436,619 currently live websites and an additional 1,011,526 domains that redirect to sites in this list. 371,430 sites that used this technology previouslyand 198,883 websites in the United States currently using MailChimp SPF.
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