On 26/11/2024 14:16, Carsten Schiefner via mailop wrote:
For the most part, in my experience, the largest ESPs are very good.
[...] Apple iCloud is also good, although their bounce reasons are
very opaque. [...]
They are precisely the reason that I started this (sub-) thread - as
even after multiple attempts I failed to extract the exact reason from
the webpage referred to in:
<[email protected]>: 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)
My experience of this particular error message from Apple iCloud is that
it's content related and generally a blacklisted URL or domain in the
body of the email.
Andy
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