Business email hosting from Zoho.
https://www.zoho.com/mail/
Email Hosting Providers · Business Email Hosting
Get access to data on 982,850 websites that are Zoho Mail Customers. We know of 654,736 live websites using Zoho Mail and an additional 328,114 sites that used Zoho Mail historically and 402,659 websites in the United States.
Get a list of 982,850 websites using Zoho Mail which includes location information, hosting data, contact details, 654,736 currently live websites and an additional 145,746 domains that redirect to sites in this list. 328,114 sites that used this technology previously and 402,659 websites in the United States currently using Zoho Mail.