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by Sascha Corti.
Original Post: Mailservers and Blacklists
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You may not know about SORBS until you are in some trouble. Well, it happened to me two days ago. SORBS keeps a blacklist of mail servers that are used (or probably operated) by spammers. This is a good thing until they decide that your server is such a spam-server. After that, most email sent from my domain gets rejected and sent back as "we do not accept email from this IP". Ouch. So what got me there? Was the invitation to my birthday party that I sent out to about 10 people too much?
Fortunately no.
SORBS is adding all dynamic IP ranges to their blacklist in an effort to prevent spammers to use ISPs dynamic IP pools for their servers - but for people running their own little domain at home, this may turn out to be a problem.
I however own 8 fix IPs (not without a certain pride) that I do not consider "dynamic IP space". Talking to my provider (cablecom.ch) today, I am happy to learn that they are informed and that SORBS didn't just add their dynamic IP range but also all the static IPs from their business customers.
My comment: If they have so much power over the internet, they should be cautious in executing it.