It's very likely that "rechnung" in the filename is actually the trigger here. There has been a deluge of phishing mails
using such attachments. Rejecting just on the name doesn't seem too smart, but spamfighing isn't an exact science...
Cheers,
Hans-Martin
Am 12. Juni 2026 12:37:47 schrieb Benoît Panizzon via mailop
<[email protected]>:
Hi Team
Lots of our customers nowadays choose to receive our invoices by email.
SPF Entry => Correct
DKIM Signature => Validation passes
DMARC Policy => Published
Sender IP => Not on any know blacklist
Microsoft / Google / GMX / Any other ESP accept the emails and don't
flag them as spam.
Only @icloud.com almost always rejects all emails containing a PDF
with the filename containing "rechnung" and text containing "rechnung".
It looks like it's a combination of the body text and PDF which causes
the emails to be rejected. Of we send only the body text, but no PDF,
the email gets through, if we only send the PDF and an empty body, it
gets throught. We tried to alter the body text in various ways, but as
soon as there are more then a dozen of lines, the whole emails is being
rejected.
Anyone an insight what could cause the issue? Any contact @ Apple to
help figure out the cause?
--
Mit freundlichen Grüssen
-Benoît Panizzon- @ HomeOffice und normal erreichbar
--
I m p r o W a r e A G - Leiter Commerce Kunden
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