Some last changes

port-check.sh

@@ -2,9 +2,11 @@
 
 . mailcow.conf
 
+if [[ -z $(which ss) ]]; then echo "Please install the ss util first."; exit 1; fi
+
 for port in ${SMTP_PORT} ${SMTPS_PORT} ${SUBMISSION_PORT} ${IMAP_PORT} ${IMAPS_PORT} ${POP_PORT} ${POPS_PORT} ${SIEVE_PORT} 443; do
 	if [[ ! -z $(ss -tlnp "( sport = :$port )" 2> /dev/null | grep LISTEN | grep -vi docker) ]]; then
-		echo "Port $port is in use by other process."
+		echo "Port $port is in use by another process."
 		err=1
 	fi
 done