Email and web security services, providing Microsoft 365, secure exchange hosting and spam/virus protection.
https://www.appriver.com/
Email Hosting Providers · Secure Email
Get access to data on 134,634 websites AppRiver Customers. We know of 69,713 live websites using AppRiver and an additional 64,921 sites that used AppRiver historically and 59,357 websites in the United States.
Get a list of 134,634 websites using AppRiver which includes location information, hosting data, contact details, 69,713 currently live websites and an additional 77,634 domains that redirect to sites in this list. 64,921 sites that used this technology previouslyand 59,357 websites in the United States currently using AppRiver.
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These are sites that we think might use AppRiver in the future because of their similarity to other sites that already do.