Verified Link

USA Charities and Non-ProfitsUSA Charities and Non-Profits

USA Charities and Non-Profits Usage Statistics · Download List of All Websites using USA Charities and Non-Profits

An 990-N filing showing the website may be a charity, religious organization, private foundation, political organization or other non-profit under IRC 501(c)(3).

Policy

Email Hosting Providers

Google Apps for BusinessGoogle Apps for Business

Google Apps for Business Usage Statistics · Download List of All Websites using Google Apps for Business

Web-based email, calendar, and documents for teams. Renamed to Google Apps for Work, but now known as G Suite from Google Cloud.

Business Email Hosting

SPFSPF

SPF Usage Statistics · Download List of All Websites using SPF

The Sender Policy Framework is an open standard specifying a technical method to prevent sender address forgery.

Operating Systems and Servers