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Tag: sbl

Data is the key to deliverability

Last week I had the pleasure of speaking to the Sendgrid Customer Advisory Board about email and deliverability. As usually happens when I give talks, I learned a bunch of new things that I’m now integrating into my mental model of email. One thing that bubbled up to take over a lot of my thought […]

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Incorrect rejection messages

At least one ESP and Spamhaus are currently investigating bounce messages at a couple ISPs incorrectly pointing to Spamhaus as the reason for the block. The bounce messages are taking the form: smtp; 554 p3plibsmtp03-07.prod.phx3.secureserver.net bizsmtp IB105. Connection refused. 192.0.2.24 is listed on the Exploits Block List (XBL) <http://www.spamhaus.org/query/ip/192.0.2.24> Please visit http://www.spamhaus.org/xbl/ for more information. […]

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If you want to spam, don’t be stupid

Some random UK email marketing company that I’ve never heard of harvested my address off of LinkedIn (yes, it’s my LinkedIn specific address) and is now spamming me advertising their cheap email marketing services. There were a lot of things about this particular mail that really annoyed me. The annoyance wasn’t just spam in a […]

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dDOS spreads to the CBL

Spamhaus has mostly mitigated the dDOS against the Spamhaus website and mailserver, but now the CBL is under attack. They have been working to get that under protection as well, but it’s taking some time. Right now there are no public channels for delisting from the CBL. The Spamhaus Blog will be updated as things […]

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Spamhaus under major dDOS

Late last night I, and a number of other folks, received mail from Spamhaus informing us of a major denial of service attack against their servers. The attack is so bad that the website and main mailserver is currently offline. DNS services, including rsync and the mirrors, are up and running. Spamhaus is working to […]

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Spamhaus Speaks

There’s been a lot of discussion about Spamhaus, spam traps, and blocking. Today, Spamhaus rep Denny Watson posted on the Spamhaus blog about some of the recent large retailer listings. He provides us with some very useful information about how Spamhaus works, and gives 3 case studies of recent listings specifically for transactional messages to […]

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Confirming addresses for transactional mail

A colleague was asking about confirming transactional mail today. It seems a couple of big retailers got SBLed today for sending receipts to spamtraps. I talked a few weeks ago about why it’s important to let people unsubscribe from transactional email, and many of those same things apply to confirming receipts. First, let’s look at […]

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Questions about CAN SPAM.

In the US, the law governing the sending of commercial email is CAN SPAM. I’ve seen a number of questions about CAN SPAM recently. One came from twitter, where someone was asking if just having an email address meant permission to send to it. Clearly, just being able to dig up an email address doesn’t […]

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Spamhaus dDOS

I got mail late last night from one of the Spamhaus peeps telling me that they were under a distributed Denial of Service (dDOS) attack. This is affecting email. Incoming email is delayed and they’re having difficulty sending outgoing email. This is affecting their responses to delisting queries. They are working on mitigation and hopefully […]

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Nameless and faceless

Ken Magill wrote about Spamhaus last week. In the article he commented about the volunteers. By most accounts, the folks responsible for maintaining Spamhaus’s blacklists can be a very annoying group to deal with—mainly because they’re faceless and unforgiving. Today, Ken published a response from Steve Linford, the head of Spamhaus. The response is well […]

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  • 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


  • iCloud Service Disruption

    40% of iCloud users were affected this morning during a service disruption between 2:15AM and 9:30AM. Apple System StatusNo Comments


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