Create sieve_after handler

data/Dockerfiles/dovecot/docker-entrypoint.sh

@@ -1,8 +1,16 @@
 #!/bin/bash
 set -e
 
+# Set config parameters, escape " in db password
+DBPASS=$(echo ${DBPASS} | sed 's/"/\\"/g')
 sed -i "/^connect/c\connect = \"host=mysql dbname=${DBNAME} user=${DBUSER} password=${DBPASS}\"" /etc/dovecot/sql/*
 
+[[ ! -d /var/vmail/sieve ]] && mkdir -p /var/vmail/sieve
+cat /etc/dovecot/sieve_after > /var/vmail/sieve/global.sieve
+sievec /var/vmail/sieve/global.sieve
+chown -R vmail:vmail /var/vmail/sieve
+
+# Do not do this every start-up, it may take a very long time. So we use a stat check here.
 if [[ $(stat -c %U /var/vmail/) != "vmail" ]] ; then chown -R vmail:vmail /var/vmail ; fi
 
 exec "$@"