diff --git a/.gitmodules b/.gitmodules
index 0ed2caff..bc127a9e 100644
--- a/.gitmodules
+++ b/.gitmodules
@@ -7,3 +7,6 @@
 [submodule "test/test_helper/bats-assert"]
 	path = test/test_helper/bats-assert
 	url = https://github.com/ztombol/bats-assert
+[submodule "target/docker-configomat"]
+	path = target/docker-configomat
+	url = https://github.com/alinmear/docker-configomat
diff --git a/Dockerfile b/Dockerfile
index 5eb466e1..677394a1 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -144,7 +144,7 @@ RUN curl -s https://letsencrypt.org/certs/lets-encrypt-x3-cross-signed.pem > /et
 
 COPY ./target/bin /usr/local/bin
 # Start-mailserver script
-COPY ./target/start-mailserver.sh /usr/local/bin/
+COPY ./target/start-mailserver.sh ./target/docker-configomat/configomat.sh /usr/local/bin/
 RUN chmod +x /usr/local/bin/*
 
 EXPOSE 25 587 143 993 110 995 4190
diff --git a/target/docker-configomat b/target/docker-configomat
new file mode 160000
index 00000000..e3e84ded
--- /dev/null
+++ b/target/docker-configomat
@@ -0,0 +1 @@
+Subproject commit e3e84ded29d88b2945c0782dbb43237c561a54a9
diff --git a/target/start-mailserver.sh b/target/start-mailserver.sh
index 1f5438d0..e2c4d5e3 100644
--- a/target/start-mailserver.sh
+++ b/target/start-mailserver.sh
@@ -316,50 +316,6 @@ function display_startup_daemon() {
 	return $res
 }
 
-function override_config() {
-	notify "task" "Starting do do overrides"
-
-	declare -A config_overrides
-
-	_env_variable_prefix=$1
-	[ -z ${_env_variable_prefix} ] && return 1
-
-
-	IFS=" " read -r -a _config_files <<< $2
-
-	# dispatch env variables
-	for env_variable in $(printenv | grep $_env_variable_prefix);do
-		# get key
-		# IFS not working because values like ldap_query_filter or search base consists of several '='
-		# IFS="=" read -r -a __values <<< $env_variable
-		# key="${__values[0]}"
-		# value="${__values[1]}"
-		key=$(echo $env_variable | cut -d "=" -f1)
-		key=${key#"${_env_variable_prefix}"}
-		# make key lowercase
-		key=${key,,}
-		# get value
-		value=$(echo $env_variable | cut -d "=" -f2-)
-
-		config_overrides[$key]=$value
-	done
-
-	for f in "${_config_files[@]}"
-	do
-		if [ ! -f "${f}" ];then
-			echo "Can not find ${f}. Skipping override"
-		else
-			for key in ${!config_overrides[@]}
-			do
-				[ -z $key ] && echo -e "\t no key provided" && return 1
-
-				sed -i -e "s|^${key}[[:space:]]\+.*|${key} = ${config_overrides[$key]//&/\\&}|g" \
-				${f}
-			done
-		fi
-	done
-}
-
 # !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
 # !  CARE --> DON'T CHANGE, except you know exactly what you are doing
 # !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
@@ -579,7 +535,7 @@ function _setup_ldap() {
 		[[ $f =~ ldap-user ]] && export LDAP_QUERY_FILTER="${LDAP_QUERY_FILTER_USER}"
 		[[ $f =~ ldap-group ]] && export LDAP_QUERY_FILTER="${LDAP_QUERY_FILTER_GROUP}"
 		[[ $f =~ ldap-aliases ]] && export LDAP_QUERY_FILTER="${LDAP_QUERY_FILTER_ALIAS}"
-		override_config "LDAP_" "${f}"
+		configomat.sh "LDAP_" "${f}"
 	done
 
 	notify 'inf' "Configuring dovecot LDAP"
@@ -598,7 +554,7 @@ function _setup_ldap() {
 		export $var=${_dovecot_ldap_mapping[$var]}
 	done
 
-	override_config "DOVECOT_" "/etc/dovecot/dovecot-ldap.conf.ext"
+	configomat.sh "DOVECOT_" "/etc/dovecot/dovecot-ldap.conf.ext"
 
 	# Add  domainname to vhost.
 	echo $DOMAINNAME >> /tmp/vhost.tmp
@@ -763,7 +719,8 @@ function _setup_ssl() {
 	case $SSL_TYPE in
 		"letsencrypt" )
 			# letsencrypt folders and files mounted in /etc/letsencrypt
-			if [ -e "/etc/letsencrypt/live/$HOSTNAME/fullchain.pem" ]; then
+			if [ -e "/etc/letsencrypt/live/$HOSTNAME/cert.pem" ] \
+			&& [ -e "/etc/letsencrypt/live/$HOSTNAME/fullchain.pem" ]; then
 				KEY=""
 				if [ -e "/etc/letsencrypt/live/$HOSTNAME/privkey.pem" ]; then
 					KEY="privkey"