Abstract: A system and method for sending email. The method includes the steps of receiving: an email address including a destination domain from a user; prior to sending a message to the destination domain, determining whether the destination domain will receive email; and providing an indication to the user that the email may not be deliverable to the address. In one embodiment, the step of determining includes maintaining a list of problematic destination domains and checking the destination domain against said list.

Abstract: A system and method for providing information concerning the use of processing devices coupled to a network. Each device has an IP address the system and method: determines whether a user is authorized to receive information about the use of the processing device by reference to the IP address; verifies the authority of the user to receive information about the processing device; and provides aggregated usage information about activities based on the address of the processing device. The information provided can be email protocol command metadata.

Abstract: A system and method for providing email using a flexible routing technique based on MX records. The method includes the steps of creating an MX record for a user, the MX record identifying a storage location for the user within the system; and routing mail within the enterprise email system using the information contained in the MX record. A system may include an inbound mail transfer agent coupled to an external network and an internal network; user email data storage having an address within the internal network; a user location database server containing a unique user token identifying a storage location for user email data in the user email data storage; and an internal DNS server including MX records for storage domains on the internal network.

Abstract: A system and method for gathering data on unsolicited email messages delivered to non-existent accounts. The method may include the steps of receiving email for a subset of non-existent email recipient accounts on an email system; and gathering message data for at least a subset of said invalid recipient accounts. The system may include a messaging transfer agent; a dynamic trap engine; and a dynamic trap message data store.

Abstract: A system and method for verifying messages. The method may include the steps of receiving an inbound message and characterizing the inbound message by analyzing a latent cryptographic identifier in the inbound message. The identifier is generated by a recognized message system, which may be the receiving system itself, for an outbound message. Characterizing may involve detecting if the latent cryptographic identifier is present and determining if the cryptographic identifier is valid. The step of determining can be performed using symmetric or asymmetric methods of verifying the authenticity of the message.

Abstract: The subject invention provides for a system and method that facilitates detecting and preventing spam in a variety of networked communication environments. In particular, the invention provides several techniques for monitoring outgoing communications to identify potential spammers. Identification of potential spammers can be accomplished at least in part by a detection component that monitors per sender at least one of volume of outgoing messages, volume of recipients, and/or rate of outgoing messages. In addition, outgoing messages can be scored based at least in part on their content. The scores can be added per message per sender and if the total scores) per message or per sender exceeds some threshold, then further action can be taken to verify whether the potential spammer is a spammer. Such actions include human-inspecting a sample of the messages, sending challenges to the account, sending a legal notice to warn potential spammers and/or shutting down the account.