dnswl.org will remove a workaround-file for Postfix < 2.8 from download on August 31st 2017. Continue reading “Removal of workaround-file for Postfix < 2.8 from download"
TL;DR: There are over 500’000 legitimate mailservers on the Internet. If you are not managing the IPs of your own mailservers at dnswl.org yet, you should do it!
dnswl.org has partnered with MXTools for subscriptions to dnswl.org data. MXTools is a global leader in providing IP and Domain Reputation Data along with anti-abuse solutions to network operators across a wide range of markets.
MXTools adds dnswl.org datafeed services to their existing portfolio of IP-based blocklists.
TL;DR: Sign up to the dnswl.org Self Service and start managing the reputation of your IPs.
dnswl.org limits the use of the public nameserver infrastructure to those doing fewer than 100’000 lookups per 24 hours and to non-commercial use (see here for details). Continue reading “Enforcement of dnswl.org access limits”
For historical reasons, the website to manage subscriptions to dnswl.org data was using a separate website (and “separate-everything”). Over the past months we worked to integrate this into the more generic Self Service. Continue reading “Subscription website moved into Self Service”
Since the dnswl.org Self Service went live in mid December 2015, we got over 1’000 Self Service user signups, and these users created over 3’000 Change Requests. Of course we are happy about the great up-take of the Self Service in the community.
For years, an unknown number of users behind TOR exit nodes have been abusing dnswl.org resources. Apparently for every email they receive, they query dnswl.org via the web, using the search interface open to all users. This causes considerable load on our webservers, the database servers, and our network infrastructure, sometimes causing significant delays for legitimate users.
As of Nov 30 2015, there is a slight change to the PGP key we use for signing the download files – there is no more expiration date on that key. Private key and fingerprint remain unchanged.
The updated key can be downloaded here.
Starting in early November 2014, we took some additional measures to enforce the query limit on our free nameserver infrastructure of 100’000 queries per 24 hours per organisation. As a result, some people may get a “blocked” result in their spamfilter setup.