diff --git a/upgrade_roundcube.sh b/upgrade_roundcube.sh
index 3aadb44..a113aa3 100755
--- a/upgrade_roundcube.sh
+++ b/upgrade_roundcube.sh
@@ -230,6 +230,15 @@ fi
 [[ -n "$DB_NAME" ]] || DB_NAME="$DEFAULT_DB_NAME"
 [[ -n "$DB_USER" ]] || DB_USER="$DEFAULT_DB_USER"
 
+[[ -n "$POSTFIX_DB_TYPE" ]] || fatal "Plugin password: Database Type for Password Database (POSTFIX_DB_TYPE) not given!"
+if [[ "$POSTFIX_DB_TYPE" != "pgsql" ]] && [[ "$POSTFIX_DB_TYPE" != "mysql" ]]; then
+   fatal "Unknown Database Type '$POSTFIX_DB_TYPE' for Password Database (POSTFIX_DB_TYPE)"
+fi
+[[ -n "$POSTFIX_DB_HOST" ]] || POSTFIX_DB_HOST="localhost"
+[[ -n "$POSTFIX_DB_NAME" ]] || POSTFIX_DB_NAME="postfix"
+[[ -n "$POSTFIX_DB_USER" ]] || POSTFIX_DB_USER="postfix"
+[[ -n "$POSTFIX_DB_PASSWD" ]] || fatal "Plugin password: Password for Password Database (POSTFIX_DB_PASSWD) not given!"
+
 [[ -n "$MYSQL_DEBIAN_INSTALLATION" ]] || MYSQL_DEBIAN_INSTALLATION=false
 
 
@@ -301,6 +310,20 @@ if [[ "$DB_TYPE" = "mysql" ]]; then
    echo -e   "\tMySQL Credentials (root access)......: $MYSQL_CREDENTIALS"
 fi
 echo ""
+if [[ "$POSTFIX_DB_TYPE" = "mysql" ]]; then
+   echo -e   "\tDatabase type of Postfix Database....: MySQL"
+   echo -e   "\tMySQL from Debian Package System.....: $MYSQL_DEBIAN_INSTALLATION"
+else
+   echo -e   "\tDatabase type of Postfix Database....: PostgreSQL"
+fi
+echo -e   "\tHost of Roundcube Database...........: $POSTFIX_DB_HOST"
+echo -e   "\tName of Roundcube Database...........: $POSTFIX_DB_NAME"
+echo -e   "\tUser of Roundcube Database...........: $POSTFIX_DB_USER"
+echo -e   "\tPassword of Roundcube Database.......: $POSTFIX_DB_PASSWD"
+if [[ "$DB_TYPE" = "mysql" ]]; then
+   echo -e   "\tMySQL Credentials (root access)......: $MYSQL_CREDENTIALS"
+fi
+echo ""
 echo -e   "\tCrontab backup file..................: $crontab_backup_file"
 
 echo ""
@@ -354,6 +377,27 @@ elif [[ "$DB_TYPE" = "pgsql" ]]; then
 	fi
 fi
 
+echononl "   Backup existing Database '$POSTFIX_DB_NAME'"
+if [[ "$POSTFIX_DB_TYPE" = "mysql" ]]; then
+	echo -n " (MySQL).."
+	mysqldump $MYSQL_CREDENTIALS --opt $POSTFIX_DB_NAME > ${WEBSITE_BASEDIR}/${POSTFIX_DB_NAME}.$backup_date.sql  2> $log_file
+	if [[ $? -eq 0 ]]; then
+		echo_ok
+	else
+		echo_failed
+		error "$(cat $log_file)"
+	fi
+elif [[ "$POSTFIX_DB_TYPE" = "pgsql" ]]; then
+	echo -n " (PostgreSQL).."
+	su - postgres -c "pg_dump -c $POSTFIX_DB_NAME" > ${WEBSITE_BASEDIR}/${POSTFIX_DB_NAME}.$backup_date.sql 2> $log_file
+	if [[ $? -eq 0 ]]; then
+		echo_ok
+	else
+		echo_failed
+		error "$(cat $log_file)"
+	fi
+fi
+
 
 echononl "   Backup existing web-directory .."
 if [[ -d "$CUR_INSTALL_DIR" ]]; then