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#! /bin/sh
# Copyright (c) The Exim Maintainers 2022
# SPDX-License-Identifier: GPL-2.0-or-later
# This is a sample script for demonstrating how to handle unknown users in
# a more friendly way than just returning a "user unknown" error. It can
# be called from a pipe transport set up like this:
# unknownuser_pipe:
# driver = pipe;
# command = "/opt/exim/util/unknownuser.sh",
# ignore_status,
# return_output,
# user = nobody
# which is specified by a smartuser director set up like this:
# unknownuser:
# transport = unknownuser_pipe,
# no_verify,
# driver = smartuser;
# Any output generated by this script is then returned to the sender of
# the message. You can run any commands you like at this point, for example,
# to attempt fuzzy matches on the local part of the address. Here we just
# give a bland message, demonstrating the availability of the variables
# $LOCAL_PART and $DOMAIN.
cat <<End
"$LOCAL_PART" is not a known user mailbox in the domain "$DOMAIN".
End
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