
The loss of the Spamhaus domain would, at minimum, reduce the effectiveness of its services. Spamhaus maintains a blacklist of IP addresses used by spammers that's widely used by ISPs and organisations as a "first-level defence" in weeding out junk mail traffic. According to Spamhaus, its list help block 50bn spams per day.
Suspending its services could potentially result in a huge increase of unwanted junk hitting mail server queues all over the world. ISPs and end-users commonly use other spam-filtering techniques independent of Spamhaus so all these extra spam messages would not necessarily hit users inboxes. Removal of Spamhaus's services would still, however, put an additional unwarranted burden on computing infrastructures.






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