The Spam and Open Relay Blocking System (SORBS) was conceived as an anti-spam project where a daemon would check "on-the-fly", all servers from which it received email to determine if that email was sent via various types of proxy and open-relay servers.

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Please note that this service has been decommissioned and will no longer contain reputation data. Given the wide range of potential replacement solutions in the market, Proofpoint cannot make specific recommendations nor endorse any specific replacement product.

For contact/job offers/consultancy requests for Michelle Sullivan, she can be contacted by email using for the forseable future.

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