Tag: Spamhaus

What happened with the CBL false listings?

The CBL issued a statement and explanation for the false positives. Copying it here because there doesn’t seem to be a way to link directly to the statement on the CBL front page. November 24, 2015 Widespread false positives Earlier today, a very large scale Kelihos botnet event occured – by large scale, many email installations […]

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Increase in CBL listings

Update: As of Nov 24, 2015 11:18 Pacific, Spamhaus has rebuilt the zone and removed the broken entries. Expect the new data to propagate in 10 – 15 minutes. Delivery should be back to normal. The CBL issued a statement, which I reposted for readers that find this post in the future. I think it’s […]

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Dealing with blocklists, deliverability and abuse people

There are a lot of things all of us in the deliverability, abuse and blocklist space have heard, over and over and over again. They’re so common they’re running jokes in the industry. These phrases are used by spammers, but a lot of non-spammers seem to use them as well. The most famous is probably […]


ROKSO lawsuit settled

Earlier this year Ken Magill reported that a judge in the UK was allowing a libel case against Spamhaus to go forward. I thought for sure I’d blogged about the case at the time, but apparently I didn’t. The short version is that today Spamhaus announced the lawsuit was settled and the complainants paid for Spamhaus’ […]

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Email verification services

Just yesterday a group of delivery folks were discussing email verification services over IRC. We were talking about the pros and cons, when we’d suggest using them, when we wouldn’t, which ones we’ve worked with and what our experiences have been. I’ve been contemplating writing up some of my thoughts about verification services but it’s a […]


Brief DBL false positive

A code glitch in a new DBL sub-zone known as 'Abused-Legit' caused the new Abused-Legit zone to list ".net." for 60 minutes from 08:35 UTC. — The Spamhaus Project (@spamhaus) December 17, 2014 Spamhaus are rolling out a new subzone of the DBL, for domains whose webservers have been compromised and used to host spam […]

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The true facts of spam traps and typo traps

I’m seeing an increase in the number of articles stating wildly wrong things about spam traps. Some have started claiming that typo traps are new. Or that typo traps are newly used by Spamhaus. These claims make for great copy, I guess. Wild claims about how the evil anti-commerce self-appointed internet police are actively trying to trap […]

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Spamhaus on ESPs

Promoted from yesterday’s comments, Spamhaus comments on my discussion of filtering companies getting tired of ESPs. You hit the nail square on, Laura. As Laura knows but many here might not, I am with the Spamhaus project. At one time I was leading efforts to clean up ESP spam. I am not deeply involved with […]



ROKSO is the Register of Known Spamming Operations. It is a list of groups that have been disconnected from more than 3 different networks for spamming. ROKSO is a little bit different than most of the Spamhaus lists. The listings themselves talk more about the background of the listees and less about the specific emails […]


Open relays

Spamhaus wrote about the return of open relays yesterday. What they’re seeing today matches what I see: there is fairly consistent abuse of open relays to send spam. As spam problems go it’s not as serious as compromised machines or abuse-tolerant ESPs / ISPs/ freemail providers – either in terms of volume or user inbox […]

  • Lost in the mists of time

    Over on the Farsight Security blog Joe St. Sauver talks about some of the early days of online abuse, on usenet. Laura and I were on the periphery of early usenet abuse, mostly as users, but Usenet (and IRC) around then were the places we both started with email abuse.No Comments

  • Ongoing Yahoo delays

    I've been hearing from folks over the last few days that they're seeing an uptick in deferrals from Yahoo! The deferrals are not uniform. ESPs report they're seeing some, but not all, customers affected. Other ESPs aren't seeing any changes. It's not just you. But it would be very worthwhile to dig into engagement and other stats. It's possible this is a new normal at Yahoo! and they're tightening filters to catch mail that doesn't fit their standards but was previously difficult to filter.No Comments

  • AOL starts using Sender Score Certification

    Good news for Sender Score Certified IPs. Return Path recently announced that AOL has joined the list of ISPs offering preferential treatment to certified IPs.  1 Comment