Facebook Domain Verification

Facebook Domain Verification Usage Statistics · Download List of All Websites using Facebook Domain Verification

Domain Verification provides a way for you to claim ownership of your domain in Facebook Business Manager.

Mailgun

Mailgun Usage Statistics · Download List of All Websites using Mailgun

Mailgun is a set of APIs that allow you to send, receive, track and store email effortlessly.

Transactional Email

SPF

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.

Google 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

DMARC

DMARC Usage Statistics · Download List of All Websites using DMARC

A technical specification created by a group of organizations that want to help reduce the potential for email-based abuse

DMARC

Linode

Linode Usage Statistics · Download List of All Websites using Linode

VPS hosting company specializing in Linux hosting.

US hosting · VPS Hosting

Akamai Hosted

Akamai Hosted Usage Statistics · Download List of All Websites using Akamai Hosted

Data network CDN provider.

German hosting

Linode DNS

Linode DNS Usage Statistics · Download List of All Websites using Linode DNS

DNS services provided by Linode.

Google Webmaster

Google Webmaster Usage Statistics · Download List of All Websites using Google Webmaster

Webmaster tools provide you with a free and easy way to make your site more Google-friendly.