On Mon, Apr 22, 2024 at 12:21:01AM -0400, 785 243 via Postfix-users wrote:
> Recently i'm seeing a few messages deferred with status=deferred
> (bounce or trace service failure)
>
> instead of status=deferred (host .. said: 450 ...)
>
> from the logs:
>
> postfix/smtp[272605]: warning: unexpected protocol
> delivery_request_protocol from private/bounce socket (expected:
> delivery_status_protocol)
Your master.cf file has bad settings. Post the verbatim (no rewrapping
of whitespace of line breaks) output of "postconf -Mf".
The "bounce" service entries should be:
# Possibly chrooted, if Debian prefers that.
#
bounce unix - - n - 0 bounce
defer unix - - n - 0 bounce
trace unix - - n - 0 bounce
Or perhaps the "bounce" service executable has been replaced with a link
to a delivery agent? The "real" bounce service supports the expected
protocol.
--
Viktor
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