On 2024-06-01 01:30, J Doe wrote: > On 2024-05-31 09:35, Gellner, Oliver via mailop wrote: >> Hi list, >> >> there are countless online services which offer to verify email addresses >> and advertise this as "we help you to prune your contact lists". Some of >> them, like hunter[.]io or zerobounce[.]net, behave very similar to spammers >> in the past and are going to great lengths to hide or spoof their identity. >> They move around their server ip addresses and spin up random domains to >> perform their verification checks from. >> >> I was wondering if anyone knows a RBL or database which collects and tries >> to keep track of the domains and IP addresses used by such list washing >> services.
> Hi Oliver, > I am not aware of a service that focuses on blocking contact list verifiers / > address verifiers, but I have seen some of them blocked via Spamhaus Zen. Thank you for the replies. According to my checks, Spamhaus Zen and other RBL block only a few of the IP addresses used by those services, probably the ones who tried to verify the existence of a spam trap address. However there are other postmasters with the same pain who privately collect IP addresses and domains of those services. Maybe I'll get around to compile them into a clean list and share them. -- BR Oliver ________________________________ dmTECH GmbH Am dm-Platz 1, 76227 Karlsruhe * Postfach 10 02 34, 76232 Karlsruhe Telefon 0721 5592-2500 Telefax 0721 5592-2777 dmt...@dm.de<mailto:dmt...@dm.de> * www.dmTECH.de<http://www.dmtech.de> GmbH: Sitz Karlsruhe, Registergericht Mannheim, HRB 104927 Geschäftsführer: Christoph Werner, Martin Dallmeier, Roman Melcher ________________________________ Datenschutzrechtliche Informationen Wenn Sie mit uns in Kontakt treten, beispielsweise wenn Sie an unser ServiceCenter Fragen haben, bei uns einkaufen oder unser dialogicum in Karlsruhe besuchen, mit uns in einer geschäftlichen Verbindung stehen oder sich bei uns bewerben, verarbeiten wir personenbezogene Daten. Informationen unter anderem zu den konkreten Datenverarbeitungen, Löschfristen, Ihren Rechten sowie die Kontaktdaten unserer Datenschutzbeauftragten finden Sie hier<https://www.dm.de/datenschutzerklaerung-kommunikation-mit-externen-493832>. _______________________________________________ mailop mailing list mailop@mailop.org https://list.mailop.org/listinfo/mailop
