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 DNS Check Tools

These check tools are: online (so are always ready to run in seconds, and you don't need to...

 Validation of viewstate MAC failed. If this application is hosted by a Web Farm or cluster, ensure that <machineKey> configuration specifies the same validationKey and validation algorithm. AutoGenerate cannot be used in a cluster.

This error is usually caused by the asp.net worker process or the server recycling. By default,...

 What is a "Glue Record"?

Glue records are A records that are associated with NS records to provide "bootstrapping"...

 ICANN's Inter-Registrar Transfer Policy (IRTP)

What is IRTP? The Inter-Registrar Transfer Policy (IRTP) was developed by ICANN for the safe and...

 Setting Up SPF Record

SPF (Sender Policy Framework) is a kind of DNS record, in order to fight spam and increase the...