diff --git a/NGINX-Installer.sh b/NGINX-Installer.sh
index f5f7f91..f712891 100644
--- a/NGINX-Installer.sh
+++ b/NGINX-Installer.sh
@@ -192,12 +192,12 @@ ln -s /usr/share/phpmyadmin /var/www/"$domain"/html/database
 #    Postfix    #
 ##-------------##
 
-debconf-set-selections <<< "postfix postfix/mailname string $domain"
+debconf-set-selections <<< "postfix postfix/mailname string $hostname"
 debconf-set-selections <<< "postfix postfix/main_mailer_type string 'Internet Site'"
 apt install -y mailutils
 sed -i 's/#inet_interfaces = all/inet_interfaces = loopback-only/g' /etc/postfix/main.cf
 sed -i 's/mydestination/#mydestination/g' /etc/postfix/main.cf
-sed -i 's/relayhost =/mydestination = '$domain', localhost.'$domain', '$domain'/g' /etc/postfix/main.cf
+sed -i 's/relayhost =/mydestination = '$hostname', localhost.'$hostname', '$hostname'/g' /etc/postfix/main.cf
 cat <<EOF > /etc/aliases
 # See man 5 aliases for format
 postmaster:    root