On Tue, Nov 26, 2024 at 6:23 AM Carsten Schiefner via mailop < mailop@mailop.org> wrote:
> > <...@icloud.com>: host mx01.mail.icloud.com[17.56.9.31] said: 554 5.7.1 > [CS01] Message rejected due to local policy. Please visit > https://support.apple.com/en-us/HT204137 (in reply to end of DATA > command) > > There it reads "iCloud Mail authenticates all inbound emails using SPF > and DKIM" - is this 'and' a strict requirement? As in: "All inbound > emails must have proper SPF *and* DKIM"? If so then I already know to > whom to talk to... > > No idea. We've had SPF and DKIM forever, and would still see CS01 errors. Here's the (maybe incomplete) list of all errors we've seen and (possibly wrong) delivery interpretations wrt group email delivery: CS01 - Will be accepted by many/most recipients CS02 - Something wrong with the email, will be rejected by all recipients HM07 - Something wrong with the email, will be rejected by all recipients HM08 - Will be accepted by many/most recipients AB01 - You're being blocked, all email to Apple will fail I've seen some instances of HM07 where it seems the reason is that they contain Constant Contact links. Cheers, Mark
_______________________________________________ mailop mailing list mailop@mailop.org https://list.mailop.org/listinfo/mailop
