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The homepage of the Sender Policy Framework project.


DMARC.ORG is where the DMARC technical specification was born. There's a lot of good information to be had on the site, including FAQs, overviews, and news.


The ultimate resource and tools site for email delivery, including DNS Tools, WHOIS Lookup, Blacklist Checker, IP Address converter, Spam Checker, and so much more.

We made available a plethora of free tools (located on the top navigation menu) ...


This site provides information to information technology professionals who administer systems that send email to and receive email from It also provides some information about how users with accounts can report junk email and p ...


100% uptime guaranteed Hosted Exchange email solutions at competitive pricing from iomart, a leading provider of cloud services to enterprises of all sizes.

Category:Hosted Exchange

MessageStream is the UK’s largest and most popular cloud marketplace for resellers, where IT professionals and service providers can buy cloud services for their clients quickly and easily. One place, one click, one bill. It’s that simple.< ...

Category:Hosted Exchange

Increase your productivity and profitability with feature-rich business email powered by Microsoft Exchange and Heart Internet.

Stay connected with efficient email and calendar tools to streamline your tasks. Microsoft Outlook 2013 is the most ...

Category:Hosted Exchange

With Exchange Online - hosted email, you can access business email, calendar & contacts on your PC, smartphone & web browser from virtually anywhere.

Category:Hosted Exchange

Email feedback loop documentation, including how to apply for and use them.his site documents email feedback loops, including how to apply for and use them.

Category:Feedback Loops

Use Postmaster Tools to analyze your email performance, and help Gmail route your messages to the right place.

Access Data and Diagnostics - Learn from Gmail delivery errors, spam reports, feedback loop, and more.

Category:Feedback Loops

Deliverability to is based on your reputation. The Smart Network Data Services (SNDS) gives you the data you need to understand and improve your reputation at But just looking at the data isn't enough! Maintaining a ...

Category:Feedback Loops

Smart Network Data Services (SNDS) and the Junk Mail Reporting Program (JMRP) are two services provides for email senders to receive feedback on their mail. SNDS provides an overview of your IP addresses, and shows relevant statistics like ...

Category:Feedback Loops