[actual quote from qmail non-delivery notification, address anonymized]
> <[email protected]>:
> Remote host said:
> 550 5.7.1 Spam not accepted here.
> [BODY]
>
> --- Below this line is a copy of the message.
>
> Received: from [etc...]
[actual Postfix configuration details]
> header_checks:
> /Subject: VvVvV/ REJECT Spam not accepted here.
>
> body_checks:
> /VvVvV/ REJECT Spam not accepted here.
The string "[BODY]" is not sent by Postfix. Instead, it is added
by qmail. You can prove this by looking at the SMTP conversation
with a network sniffer, and see that the string "[BODY]" does not
appear in the Postfix response.
If you don't want to see the string "[BODY]" in qmail's non-delivery
notification, then you need to modify the qmail server so that it
does not add that string.
Wietse