> On 07.05.2023 at 18:54 Felix Fontein via mailop wrote: > > maybe this is related to in-berlin.de being on the Public Suffix List? > This might explain why Yahoo treats subdomains of in-berlin.de > differently than for subdomains of other domains (like e.mail.de > mentioned by Ken).
To put it more technically or in mail related terms: e.mail.de belongs to the same organizational domain as mail.de and mail.de has a SOA record. So e.mail.de as its subdomain is fine. foo.in-berlin.de on the other hand does not belong to the same organizational domain as in-berlin.de or bar.in-berlin.de, if you take the private area of the PSL into account. Hence foo.in-berlin.de needs its own SOA record and does not inherit it from in-berlin.de or .de. While I’m not affiliated with Yahoo, I see no reason to bash them in this regard. To reduce spam they don’t want to accept emails from made-up / non-existing domains, which is a legit concern. They query for SOA records to verify whether a given domain exists, which is unusual but actually less strict than requiring additional A or MX records. Even without the help of Yahoo the issue can be fixed by removing in-berlin.de from the PSL or by not spanning a single DNS zone across unrelated domains which are in no trust relationship to each other. — BR Oliver ________________________________ dmTECH GmbH Am dm-Platz 1, 76227 Karlsruhe * Postfach 10 02 34, 76232 Karlsruhe Telefon 0721 5592-2500 Telefax 0721 5592-2777 [email protected]<mailto:[email protected]> * 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 [email protected] https://list.mailop.org/listinfo/mailop
