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.

Rackspace Email Hosting

Rackspace Email Hosting Usage Statistics · Download List of All Websites using Rackspace Email Hosting

Email Hosting products that are built for Business.

Business Email Hosting · Web Hosting Provider Email

Microsoft Exchange Online

Microsoft Exchange Online Usage Statistics · Download List of All Websites using Microsoft Exchange Online

A rich hosted Exchange environment for every user without having to manage a server.

Business Email Hosting

DKIM

DKIM Usage Statistics · Download List of All Websites using DKIM

DomainKeys Identified Mail provides a method for validating a domain name identity that is associated with a message through cryptographic authentication.

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

Microsoft Azure DNS

Microsoft Azure DNS Usage Statistics · Download List of All Websites using Microsoft Azure DNS

This domain is verified with Microsoft Azure.

Office 365 Mail

Office 365 Mail Usage Statistics · Download List of All Websites using Office 365 Mail

Email sent from this domain has records showing Office 365 usage.

Business Email Hosting

Amazon

Amazon Usage Statistics · Download List of All Websites using Amazon

This site is hosted on Amazon AWS EC2 Infrastructure.

Cloud Hosting · Cloud PaaS

Rackspace DNS

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

DNS services provided by Rackspace.