diff --git a/install.sh b/install.sh
index 2194879..7d65d33 100755
--- a/install.sh
+++ b/install.sh
@@ -55,7 +55,7 @@ mysql -e "GRANT ALL PRIVILEGES ON vmail.* TO 'vmail'@'localhost';"
 mysqladmin flush-privileges
 
 # install mail server software
-DEBIAN_FRONTEND=noninteractive apt-get -y install exim4-daemon-heavy spf-tools-perl spamassassin srs libclass-dbi-mysql-perl dovecot-core dovecot-imapd dovecot-mysql dovecot-pop3d dovecot-lmtpd
+DEBIAN_FRONTEND=noninteractive apt-get -y install exim4-daemon-heavy spf-tools-perl spamassassin srs libclass-dbi-mysql-perl dovecot-core dovecot-imapd dovecot-mysql dovecot-pop3d dovecot-lmtpd mailutils
 
 # configure system users
 DEBIAN_FRONTEND=noninteractive apt-get -y install ssl-cert
@@ -161,7 +161,7 @@ systemctl enable vmail-cron.timer
 systemctl start vmail-cron.timer
 
 # enable email ports in firewalld
-[[ -d /etc/firewalld/ ]]; then
+if [[ -d /etc/firewalld/ ]]; then
   firewall-cmd --permanent --zone=public --add-service=smtp
   firewall-cmd --permanent --zone=public --add-service=smtp-submission
   firewall-cmd --permanent --zone=public --add-service=smtps