On Fri, May 12, 2023 at 03:32:45PM +0800, lty--- via Postfix-users wrote:
>
>
> Hello
>
> The mail is transferred to the postfix service of the relay server
> through the postfix service. Occasionally, the mail will be rejected and
> the message "said: 550 Mail was identified as spam" will be returned. I
> checked the source code and found no similar error message! I cannot
> reproduce this problem, Because it is sporadic.
The *REMOTE* server rejected the message, with an SMTP response
in which it "said" that the mail was identified as spam.
Since the problem was reported by the remote system, it is not
surprising that you won't find the message in the Postfix
source code.
--
Viktor.
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