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[exim.git] / src / util / unknownuser.sh

diff --git a/src/util/unknownuser.sh b/src/util/unknownuser.sh
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+#! /bin/sh
+# $Cambridge: exim/src/util/unknownuser.sh,v 1.1 2004/10/07 10:39:03 ph10 Exp $
+
+# 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
+
+
+