diff --git a/Dockerfile b/Dockerfile
index 5395bf5..c1c039f 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,4 +1,4 @@
-From ubuntu:trusty
+From ubuntu:latest
 MAINTAINER Elliott Ye
 
 # Set noninteractive mode for apt-get
diff --git a/assets/install.sh b/assets/install.sh
index 0b2aaff..140222a 100755
--- a/assets/install.sh
+++ b/assets/install.sh
@@ -27,6 +27,7 @@ tail -f /var/log/mail.log
 EOF
 chmod +x /opt/postfix.sh
 postconf -e myhostname=$maildomain
+postconf -e local_recipient_maps=
 postconf -F '*/*/chroot = n'
 
 ############
@@ -58,6 +59,7 @@ if [[ -n "$(find /etc/postfix/certs -iname *.crt)" && -n "$(find /etc/postfix/ce
   # /etc/postfix/main.cf
   postconf -e smtpd_tls_cert_file=$(find /etc/postfix/certs -iname *.crt)
   postconf -e smtpd_tls_key_file=$(find /etc/postfix/certs -iname *.key)
+  postconf -e smtpd_tls_loglevel=2
   chmod 400 /etc/postfix/certs/*.*
   # /etc/postfix/master.cf
   postconf -M submission/inet="submission   inet   n   -   n   -   -   smtpd"