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Tools and Resources 

 

 

Free DNS tools: ping, lookup, trace, spam blacklist check, etc

http://www.network-tools.com

 

 

Various free tools: SPF check, analyze headers, SMTP diagnostics and others

http://mxtoolbox.com/

 

 

How fast is your internet?

http://www.speedtest.net

 

 

Microsoft Remote Connectivity Analyzer

https://testconnectivity.microsoft.com/

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