Thanks for this pointer, Suresh - truly appreciated! Best,
-C. Am 27. November 2024 02:20:21 MEZ schrieb Suresh Ramasubramanian via mailop <mailop@mailop.org>: >If you haven’t already opened a ticket with icloudad...@apple.com please do so. > >--srs >________________________________ >From: mailop <mailop-boun...@mailop.org> on behalf of Mark Fletcher via mailop ><mailop@mailop.org> >Sent: Tuesday, November 26, 2024 10:54:06 PM >To: Carsten Schiefner <carsten@schiefner.berlin> >Cc: mailop@mailop.org <mailop@mailop.org> >Subject: Re: [mailop] Certain ESPs and mailing lists > >On Tue, Nov 26, 2024 at 6:23 AM Carsten Schiefner via mailop ><mailop@mailop.org<mailto:mailop@mailop.org>> wrote: > ><...@icloud.com<http://icloud.com>>: host >mx01.mail.icloud.com<http://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
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