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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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  • AOL FBL change

    Reminder for folks, AOL is changing their FBL from address starting on Jan 17th. AOLlogoForBlogThe (in)famous scomp@aol.net is going away to be replaced by fbl-no-reply @ postmaster.aol.com. These messages will be signed with the d= mx.postmaster.aol.com. Time to update your scripts!No Comments


  • Vague reports of Yahoo problems

    A number of people, on different forums, have been asking if anyone is seeing a higher bounce rate than usual with Yahoo. Not sure exactly what's going on here. As I understand it, folks are talking with Yahoo about it. If I hear anything more, I'll share. For now, though, if you're seeing a small increase in Yahoo bounces (or other weirdnesses) others are seeing something odd, too.No Comments


  • Responsive design just got easier at Gmail

    Today Gmail announced they are supporting media queries in Gmail and Google Inbox. This should simplify the creation of emails for multiple platforms. The full list of supported rules can be found on the Google Developer Site.No Comments


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