On Thu, Jan 25, 2024 at 04:48:39PM -0500, Bill Cole via Postfix-users wrote:
> > - Are you expected exactly one recipient per-invocation of the
> > spamassassin filter? I'm not sure how spamc handles multiple
> > recipients after "-u".
>
> It doesn't. The argument to '-u' is a key to identify a user-specific
> ruleset. The spamc too (and SA generally) has no mechanism to split
> envelopes or to provide multiple responses to a single submission.
In that case, the OP should probably have specified a recipient limit of
1 for the transport... as well as used "--" after "-f ${sender}".
Though pipe(8) manpage does not explicitly say so, it is possible to
handle repeatable options that take a recipient address provided the
option supports a syntax that does not use whitespace:
-u{$recipient}
or
--user=${recipient}
will each be repeated as many times as there are recipients:
command -u<rcpt1> -u<rcpt2> ...
command --user=<rcpt1> --user=<rcpt2> ...
which is useful for commands that can correctly handle multiple
recipients via one option per-recipient. More typical is to
use argv positional arguments for the envelope recipients, with
resubmission via "sendmail" handled transparently internally.
--
Viktor.
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