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Generating a Domain Key

Go to System Setup > Mail Authentication > ARC Signing and follow the steps below to generate a domain key. It is important to periodically rotate your ARC keys, as the longer they go unchanged, the higher the risk of one being compromised.

  1. Click Add... opposite Arc Keys:.

  2. Using the table below as a reference, complete the field in the ARC DomainKey window.

  3. Click Generate.




A unique identifier prefix for this domain key that SpamTitan uses to distinguish from any other domain keys you may have.

Private Key

A new Private key can be used to generate each key pair, or you can use an existing private key if required. SpamTitan can only generate 2048-bit domain keys for ARC Signing (some DNS registrars may not support the longer key length).


An optional comment field.