Abstract: According to certain embodiments, a method receives a certificate that identifies a sender system as owning a domain. The method sends an electronic message to the domain identified in the certificate. The electronic message is sent via a mail exchange network that correlates the domain to an address that a true owner of the domain has registered with a mail exchange authority. The method receives a response from the address that the mail exchange network correlates to the domain. The response indicates that the certificate is associated with the true owner of the domain. The method authenticates the sender system as the true owner of the domain based on the response.

Abstract: Certain embodiments disclose a method of provisioning security services for a domain or set of domains. The method comprises sending an electronic message to the domain or set of domains. The electronic message comprising a secret message. The secret message is encrypted using a public key that a certificate server associates with the domain or set of domains. The method further comprises receiving a response from the domain or set of domains. The response comprises data derived by decrypting the secret message using a private key of the domain or set of domains. In response to a determination that the received data corresponds to the secret message sent in the electronic message, the method initiates the provisioning of the security services for the domain or set of domains.

Abstract: According to certain embodiments, a method receives a certificate that identifies a sender system as owning a domain. The method sends an electronic message to the domain identified in the certificate. The electronic message is sent via a mail exchange network that correlates the domain to an address that a true owner of the domain has registered with a mail exchange authority. The method receives a response from the address that the mail exchange network correlates to the domain. The response indicates that the certificate is associated with the true owner of the domain. The method authenticates the sender system as the true owner of the domain based on the response.

Abstract: Network communication and provisioning systems and methods are provided to enable automatic provisioning of an appliance to provide encryption services for email messages and other types of electronic messages addressed to or from an email domain.

Abstract: Network communication and provisioning systems and methods are provided to enable automatic provisioning of an appliance to provide encryption services for email messages and other types of electronic messages addressed to or from an email domain.

Abstract: Network communication and provisioning systems and methods are provided to enable automatic provisioning of an appliance to provide encryption services for email messages and other types of electronic messages addressed to or from an email domain.