Autorespond using IMAP on Uberspace 7 (U7)

.qmail-test

|maildrop $HOME/.test-filter

.test-filter

############################################
# Autorespond using IMAP on Uberspace 7 (U7)
############################################

# Date: 2018-06-07

# Abstract:
# This script allows you to enable the autoresponder by creating an IMAP folder
# called "Autorespond" in the root of your IMAP folders (not in INBOX, but as
# a sibling of INBOX).
#
# Once the folder is present and it contains a message, the autoresponder is
# turned on and it will respond with the most recent message in this 
# folder. 
# 
# Limitations:
# Notice that I couldn't find a way to turn off quoting of the original message.
#
# How-to:
# In the following script, we assume that you have created a mail user test: 
# 
# uberspace mail user add test
# 
# Just replace "test" with your desired mail user name in this script.
#
# We also assume that your E-Mail-Adress is test@stardust.uber.space
# Just replace stardust with your host's name (e.g. klemola, taylor, etc), 
# don't confuse it with the name of your Uberspace 
# (the one, you have chosen yourself).
# 
# If you are using an external domain, this will work as well. E.g. for
# test@mydomain.tld. You can specify test@mydomain.tld as the sender below as well.
# 
# You should create one filter file for each autoresponder
# sender email address separately.
#
# Make sure that each filter file has access rights 600, otherwise it won't work:
# chmod 600 .test-filter
#
# Make sure that you use UNIX line-endings in this file, otherwise it won't work.
#
# Create the file .qmail-test with the following content (including the pipe):
# |maildrop $HOME/.test-filter
# 
# If you want to debug the autoresponder, turn on logging 
# by uncommenting the following line.
# 
# logfile "$HOME/test-filter.log"


# Set the default Maildir
MAILDIR="$HOME/Maildir"

# Set the sender for the autoresponse
FROM="test@stardust.uber.space"

# If you're using a separate mail user (not the primary), we setup the MAILDIR
# accordingly
import EXT
if ( $EXT )
{
	CHECKMAILDIR = `dumpvuser $EXT | grep '^Directory' | awk '{ print $2 }'`
	if ( $CHECKMAILDIR )
	{
		MAILDIR="$HOME/$CHECKMAILDIR"
	}
}

# Autoresponder rule
# 
# Note: -N is useless when using -T replydraft. I couldn't find a way to disable 
# quoting when using this reply format. Suggestions are welcome.
# See http://www.courier-mta.org/maildrop/mailbot.html

cc "| mailbot -T replydraft -l '$MAILDIR/.Autorespond' -N -A 'From: $FROM' /var/qmail/bin/qmail-inject -f ''"

# Receive the mail (the original mail goes into your INBOX)
to "$MAILDIR"

In case you want to set the FROM header automatically (e.g. if there are multiple users that should be supported by this filter, the FROM address can be constructed as follows:

import EXT
import HOST
FROM="$EXT@$HOST"