diff --git a/bin/easyengine b/bin/easyengine
index 092ea23a..505db325 100644
--- a/bin/easyengine
+++ b/bin/easyengine
@@ -131,6 +131,21 @@ elif [ "$EE_FIRST" = "stack" ] || [ "$EE_FIRST" = "system" ]; then
 		fi
 		# EasyEngine mail server setup
 		if [ "$EE_THIRD" = "--mail" ] || [ "$EE_THIRD" = "--all" ];then
+
+			# Check required Packages are installed or not
+			dpkg --get-selections | grep -v deinstall | grep nginx > /dev/null \
+			&& dpkg --get-selections | grep -v deinstall | grep php5-fpm > /dev/null \
+			&& dpkg --get-selections | grep -v deinstall | grep mysql > /dev/null \
+			&& dpkg --get-selections | grep -v deinstall | grep postfix > /dev/null
+			if [ $? -ne 0 ];then
+				ee_lib_error "Failed to find pre dependencies. Please install Nginx, PHP5, MySQL and Postfix using command ee stack install, exit status " 1
+			fi
+
+			dpkg --get-selections | grep -v deinstall | grep dovecot-core > /dev/null
+			if [ $? -eq 0 ];then
+				ee_lib_error "Found installed mail server, Please remove it before installation, exit status=" 1
+			fi
+
 			# Install Dovecot
 			ee_mod_install_dovecot
 
@@ -141,7 +156,7 @@ elif [ "$EE_FIRST" = "stack" ] || [ "$EE_FIRST" = "system" ]; then
 			ee_ven_install_roundcube
 
 			# Install Amavis
-			ee_mod_install_amavis
+			ee_mod_install_mailscan
 
 			# Install Sieve
 			ee_mod_install_sieve
@@ -159,7 +174,7 @@ elif [ "$EE_FIRST" = "stack" ] || [ "$EE_FIRST" = "system" ]; then
 			ee_ven_setup_roundcube
 
 			# Setup Amavis
-			ee_mod_setup_amavis
+			ee_mod_setup_mailscan
 
 			# Setup Sieve
 			ee_mod_setup_sieve
diff --git a/bin/update b/bin/update
index d332bd74..6f3f05a0 100644
--- a/bin/update
+++ b/bin/update
@@ -285,7 +285,7 @@ if [[ $EE_CURRENT_VERSION < $EE_LATEST_VERSION ]]; then
 				|| ee_lib_error "Unable to generate SSL certificate for port 22222, exit status = " $?
 
 				# Update PHP configuration
-				dpkg -l | grep php5-fpm &>> $EE_UPDATE_LOG
+				dpkg --get-selections | grep -v deinstall | grep php5-fpm &>> $EE_UPDATE_LOG
 				if [ $? -eq 0 ]; then
 					ee_lib_echo "Installing php5-xdebug package, please wait..."
 					apt-get -y install php5-xdebug \
@@ -325,7 +325,7 @@ if [[ $EE_CURRENT_VERSION < $EE_LATEST_VERSION ]]; then
 					|| ee_lib_error "Unable to add xdebug settings for debug pool, exit status = " $?
 				fi
 
-				dpkg -l | grep mysql-server &>> $EE_UPDATE_LOG
+				dpkg --get-selections | grep -v deinstall | grep mysql-server &>> $EE_UPDATE_LOG
 				if [ $? -eq 0 ]; then
 					ee_lib_echo "Installing percona-toolkit package, please wait..."
 					apt-get -y install percona-toolkit \
@@ -396,7 +396,7 @@ if [[ $EE_CURRENT_VERSION < $EE_LATEST_VERSION ]]; then
 			fi
 
 			if [[ $EE_CURRENT_VERSION = 2.0.0 ]]; then
-				dpkg -l | grep php5-fpm &>> $EE_UPDATE_LOG
+				dpkg --get-selections | grep -v deinstall | grep php5-fpm &>> $EE_UPDATE_LOG
 				if [ $? -eq 0 ]; then
 					
 					# WP-CLI change the installation method
diff --git a/src/modules/stack/install/mail/ee_mod_install_dovecot.sh b/src/modules/stack/install/mail/ee_mod_install_dovecot.sh
index 692dcad4..ed49ba86 100644
--- a/src/modules/stack/install/mail/ee_mod_install_dovecot.sh
+++ b/src/modules/stack/install/mail/ee_mod_install_dovecot.sh
@@ -3,23 +3,10 @@
 function ee_mod_install_dovecot()
 {
 	# Install Dovecot
-	dpkg -l | grep nginx > /dev/null \
-	&& dpkg -l | grep php5-fpm > /dev/null \
-	&& dpkg -l | grep mysql > /dev/null \
-	&&  dpkg -l | grep postfix > /dev/null
-	if [ $? -ne 0 ];then
-		ee_lib_error "Failed to find pre dependencies. Please install Nginx, PHP5, MySQL and Postfix using command ee stack install, exit status " 1
-	fi
-
-	dpkg -l | grep dovecot-core > /dev/null
-	if [ $? -eq 0 ];then
-		ee_lib_error "Found installed mail server, Please remove it before installation, exit status=" 1
-	fi
-
 	ee_lib_echo "Installing Dovecot, please wait..."
 	debconf-set-selections <<< "dovecot-core dovecot-core/create-ssl-cert boolean yes"
 	debconf-set-selections <<< "dovecot-core dovecot-core/ssl-cert-name string $(hostname -f)"
-	$EE_APT_GET install dovecot-core dovecot-imapd dovecot-pop3d dovecot-lmtpd dovecot-mysql dovecot-sieve dovecot-managesieved postfix-mysql \
+	$EE_APT_GET install dovecot-core dovecot-imapd dovecot-pop3d dovecot-lmtpd dovecot-mysql \
 	|| ee_lib_error "Unable to install Dovecot, exit status = " $?
 
 }
diff --git a/src/modules/stack/install/mail/ee_mod_install_amavis.sh b/src/modules/stack/install/mail/ee_mod_install_mailscan.sh
similarity index 56%
rename from src/modules/stack/install/mail/ee_mod_install_amavis.sh
rename to src/modules/stack/install/mail/ee_mod_install_mailscan.sh
index 6f72603a..d30be7ef 100644
--- a/src/modules/stack/install/mail/ee_mod_install_amavis.sh
+++ b/src/modules/stack/install/mail/ee_mod_install_mailscan.sh
@@ -1,9 +1,9 @@
 # Install Amavis package
 
-function ee_mod_install_amavis()
+function ee_mod_install_mailscan()
 {
 	# Install Amavis
-	ee_lib_echo "Installing Amavis and ClamAV, please wait..."
+	ee_lib_echo "Installing Amavis, SpamAssassin and ClamAV, please wait..."
 	$EE_APT_GET install amavisd-new spamassassin clamav clamav-daemon arj zoo nomarch cpio lzop cabextract apt-listchanges libauthen-sasl-perl  libdbi-perl libmail-dkim-perl p7zip rpm unrar-free libsnmp-perl \
-	|| ee_lib_error "Unable to install Amavis and ClamAV, exit status = " $?
+	|| ee_lib_error "Unable to install Amavis, SpamAssassin and ClamAV, exit status = " $?
 }
diff --git a/src/modules/stack/install/mail/ee_mod_install_sieve.sh b/src/modules/stack/install/mail/ee_mod_install_sieve.sh
index bf20b52e..e72503cb 100644
--- a/src/modules/stack/install/mail/ee_mod_install_sieve.sh
+++ b/src/modules/stack/install/mail/ee_mod_install_sieve.sh
@@ -4,6 +4,6 @@ function ee_mod_install_sieve()
 {
 	# Install Sieve
 	ee_lib_echo "Installing Sieve, please wait..."
-	$EE_APT_GET install amavisd-new spamassassin clamav clamav-daemon arj zoo nomarch cpio lzop cabextract apt-listchanges libauthen-sasl-perl  libdbi-perl libmail-dkim-perl p7zip rpm unrar-free libsnmp-perl \
+	$EE_APT_GET install apt-get install dovecot-sieve dovecot-managesieved \
 	|| ee_lib_error "Unable to install Sieve, exit status = " $?
 }
diff --git a/src/modules/stack/install/mail/ee_mod_setup_amavis.sh b/src/modules/stack/install/mail/ee_mod_setup_mailscan.sh
similarity index 97%
rename from src/modules/stack/install/mail/ee_mod_setup_amavis.sh
rename to src/modules/stack/install/mail/ee_mod_setup_mailscan.sh
index ce0e3177..811242e5 100644
--- a/src/modules/stack/install/mail/ee_mod_setup_amavis.sh
+++ b/src/modules/stack/install/mail/ee_mod_setup_mailscan.sh
@@ -1,6 +1,6 @@
 # Setup Amavis
 
-function ee_mod_setup_amavis()
+function ee_mod_setup_mailscan()
 {
 	# Confiure Amavis
 
diff --git a/src/modules/stack/install/mail/ee_mod_setup_postfix.sh b/src/modules/stack/install/mail/ee_mod_setup_postfix.sh
index c49b05f2..59dac0d6 100644
--- a/src/modules/stack/install/mail/ee_mod_setup_postfix.sh
+++ b/src/modules/stack/install/mail/ee_mod_setup_postfix.sh
@@ -9,6 +9,13 @@ function ee_mod_setup_postfix()
 	fi
 
 	EE_HOSTNAME=$(hostname -f)
+
+	#We previously not used this package. So, if some one don't have Postfix-MySQL installed,
+	#Postfix will not work
+	ee_lib_echo "Installing Postfix-MySQL, please wait..."
+	$EE_APT_GET install postfix-mysql \
+	|| ee_lib_error "Unable to install Postfix-MySQL, exit status = " $?
+
 	ee_lib_echo "Setting up Postfix, please wait..."
 	#Configure Master.cf
 	sed -i 's/#submission/submission/' /etc/postfix/master.cf &&