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Spam blocklist SORBS closed by its owner, Proofpoint

June 7, 2024
in Technology
Spam blocklist SORBS closed by its owner, Proofpoint
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Exclusive The Spam and Open Relay Blocking System (SORBS) – a longstanding source of info on known sources of spam widely used to create blocklists – has been shuttered by its owner, cyber security software vendor Proofpoint.

SORBS provided free access to a DNS-based Block List (DNSBL) that lists over 12 million host servers known to disseminate spam, phishing attacks and other email nasties. The service states its list “typically includes email servers suspected of sending or relaying spam, servers that have been hacked and hijacked, and those with Trojan infestations.”

Over 200,000 organizations use SORBS data, and the service is highly rated for its accuracy.

The service is over twenty years old and was created by Michelle Sullivan, who oversaw it as a Proofpoint employee working from Australia.

The Register inquired about the reasons for the service’s end, and Proofpoint sent the following statement:

Decommissioning SORBS saw its “Zones” – 18 lists, each devoted to a different class of spam-related server – emptied of information.

The Register understands restoring information to the Zones requires a trivial amount of work, and that the service’s code base is intact. Restarting the service would therefore not be difficult.

We further understand that news of SORBS’s demise has sparked conversation in the anti-spam community about a possible acquisition.

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SORBS has already existed in three different incarnations.

When Sullivan created the service, it was hosted it on infrastructure owned by the university she worked for at the time.

SORBS’s impact on the uni grew to the point at which it was no longer welcome, leading software vendor GFI to acquire the service. A couple of years later, GFI offloaded SORBS to Proofpoint, which has owned it and employed Sullivan ever since.

The Register has been informed the service’s hosting and operating costs are at a level that make it infeasible for an individual to take over.

Sources tell The Register that offers to acquire SORBS are certain to arrive – from spammers who have over the years expressed an interest in controlling the service for their own nefarious ends.

The anti-spam community is understandably hopeful legitimate parties will commit to operating SORBS. While Proofpoint is correct in saying alternatives exist – SpamCop and Spamhaus are the most prominent – SORBS’s transparent operating practices have earned it many plaudits over its lifetime.

Transparency in blocklist operations is paramount, because blocklist operators could with the stroke of a pen make life very hard for those who send email for a living. SORBS operated a support ticket system and staff who discussed listings, documented those discussions, and archived them. The service therefore had years’ worth of records documenting its decisions and decision-making process – a body of work that proved SORBS was neither capricious nor vengeful. ®

>>> Read full article>>>
Copyright for syndicated content belongs to the linked Source : The Register – https://go.theregister.com/feed/www.theregister.com/2024/06/07/sorbs_closed/

Tags: blocklistSORBStechnology
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