diff --git a/debian/control b/debian/control
index 27d818ec..e827aee3 100644
--- a/debian/control
+++ b/debian/control
@@ -29,7 +29,7 @@ Homepage: http://www.alternc.org/
 Package: alternc-slave
 Architecture: all
 Pre-depends: debconf (>= 0.5.00) | debconf-2.0
-Depends: debianutils (>= 1.13.1), apache2, libapache2-mod-php5, courier-ssl, courier-imap-ssl, courier-pop-ssl, php5-mysql, phpmyadmin, postfix, proftpd-mod-mysql, proftpd-basic, squirrelmail, postfix-tls, bind9, wget, rsync, quota, courier-authmysql | courier-authlib-mysql, ca-certificates, locales, perl-suid, perl, postfix-mysql, wwwconfig-common, sasl2-bin, libsasl2-modules, php5-cli, lockfile-progs (>= 0.1.9), gettext (>= 0.10.40-5), adduser, mysql-client, postgrey, sudo
+Depends: debianutils (>= 1.13.1), apache2, libapache2-mod-php5, courier-ssl, courier-imap-ssl, courier-pop-ssl, php5-mysql, phpmyadmin, postfix, proftpd-mod-mysql, proftpd-basic, squirrelmail, postfix-tls, bind9, wget, rsync, quota, courier-authmysql | courier-authlib-mysql, ca-certificates, locales, perl-suid, perl, postfix-mysql, wwwconfig-common, sasl2-bin, libsasl2-modules, php5-cli, lockfile-progs (>= 0.1.9), gettext (>= 0.10.40-5), adduser, mysql-client, sudo
 Recommends: apache2
 Conflicts: alternc-admintools, alternc-awstats (<= 0.3.2), alternc-webalizer (<= 0.9.4), alternc
 Provides: alternc
diff --git a/etc/alternc/postfix.cf b/etc/alternc/postfix.cf
index 600685b1..7abe2257 100644
--- a/etc/alternc/postfix.cf
+++ b/etc/alternc/postfix.cf
@@ -31,4 +31,4 @@ virtual_minimum_uid = 1000
 virtual_gid_maps = proxy:mysql:/etc/postfix/mygid.cf
 virtual_uid_maps = static:33
 default_privs = www-data
-smtpd_recipient_restrictions = reject_unlisted_recipient, permit_mynetworks, permit_sasl_authenticated, reject_non_fqdn_recipient, reject_unauth_destination, check_policy_service inet:127.0.0.1:60000, reject_rbl_client zen.spamhaus.org
\ No newline at end of file
+smtpd_recipient_restrictions = permit_mynetworks, permit_sasl_authenticated, reject_invalid_hostname, reject_non_fqdn_hostname, reject_non_fqdn_sender, reject_rbl_client zen.spamhaus.org, reject_non_fqdn_recipient, reject_unknown_sender_domain, reject_unknown_recipient_domain, reject_unauth_pipelining, reject_unlisted_recipient, reject_unauth_destination
diff --git a/install/alternc.install b/install/alternc.install
index 62d8b942..29ad5302 100644
--- a/install/alternc.install
+++ b/install/alternc.install
@@ -253,6 +253,17 @@ if [ -e /etc/postfix/myalias.cf -o -e /etc/postfix/mydomain.cf -o -e /etc/postfi
     chmod 640 /etc/postfix/my*
 fi
 
+if [ ! -f /etc/postfix/main.cf ]
+then
+    echo "****************************************"
+    echo "POSTFIX is NOT configured properly"
+    echo "please launch dpkg-reconfigure -plow postfix" 
+    echo "and choose 'Internet Site'"
+    echo "then reinstall alternc"
+    echo "****************************************"
+    exit 1
+fi
+
 # configure postfix appropriatly for our needs
 if [ "$slave" = "1" ]; then
     postfix_conf=/etc/alternc/postfix-slave.cf