Hi,
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).
Cheers,
Felix
On Sun, 7 May 2023 12:27:21 +0200
Carsten Schiefner via mailop wrote:
> So, at least for the time being, it appears that the Y! universe
> handle this in a non-deterministic manner.
>
> Lovely.
>
> On 07.05.2023 11:57, Ken Peng via mailop wrote:
> > May 7, 2023 at 2:17 PM, "Matt Palmer via mailop"
> > wrote:
> >>
> >> [...]
> >>
> >> It's deliberate, and documented:
> >>
> >> https://senders.yahooinc.com/smtp-error-codes/#unresolvable-from-domain
> >>
> >>
> >
> > Hello
> >
> > After my test, the subdomain e.mail.de can delivery messages to
> > yahoo.com. And, e.mail.de has no soa RR as well.
> >
> > $ dig e.mail.de soa +short
> >
> > gets nothing.
> >
> > I am guessing yahoo is blocking the specified subdomains, not all.
> >
> > As a comparision, I sent another mail from my alumni email,
> > alumni.nd.edu.
> >
> > This is a real zone, has soa defined.
> >
> > $ dig alumni.nd.edu soa +short
> > ns1.nd.edu. dns.nd.edu. 209 10800 3600 1209600 900
> >
> > And the message was delivered to yahoo successfully.
> >
> > Anyway yahoo should not reject a message only b/c its domain has no
> > SOA.
> >
> >
> > regards,
> > Ken Peng
___
mailop mailing list
mailop@mailop.org
https://list.mailop.org/listinfo/mailop