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Tag: dnsbl

Asking for help with a blocklist

There are often questions arising about how to go about getting off a particular blocklist. A few years ago I led the MAAWG effort to document what to if if you were On a Blocklist (pdf link). That document was aimed primarily at MAAWG members and deliverability experts with working knowledge of blocklists. I think, even […]

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DNSBLs, wildcards and domain expiration

Last week the megarbl.net domain name expired. Normally this would have no affect on anyone, but their domain registrar put in a wildcard DNS entry. Because of how DNSBLs work, this had the effect of causing every IP to be listed on the blocklist. The domain is now active and the listings due to the […]

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How many blocklists do we need?

There’s been a discussion on the mailop list about the number of different blocklists out there. There are discussions about whether we need so many lists, and how difficult the different lists make it to run a small mail system (80K or so users). This discussion wandered around a little bit, but started me thinking […]

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Fake DNSBLs

Spamhaus recently announced a few years ago that they have discovered a company that is pirating various blocklists, relabeling them and selling access to them. Not only is the company distributing the zones, they’re also running a “pay to delist” scheme whereby senders are told if they pay money, they’ll be removed from the lists. […]

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  • Indictments in Yahoo data breach

    Today the US government unsealed an indictment against 2 Russian agents and 2 hackers for breaking into Yahoo's servers and stealing personal information. The information gathered during the hack was used to target government officials, security employees and private individuals. Email is so central to our online identity. Compromise an email account and you can get access to social media, and other accounts. Email is the key to the kingdom.No Comments


  • Blogging

    It's been a wild week here in the US. I have to admit, the current political climate is affecting my ability to blog about email. I've always said email is not life or death. And how can I focus on the minutia of deliverability when things are in such turmoil and uncertainty? There are many things I want to write about, including some resources for those of us who are struggling with the current administration and changes in the US. What we can do. What we must do.  It just takes work and focus I don't have right now.    1 Comment


  • Email trends for 2017

    Freshmail has published a list of email marketing trends for 2017 from some of their favorite experts. I am honored to be included. Go check it out!No Comments


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