Added error handling

src/modules/stack/install/mail/ee_mod_setup_postfix.sh

@@ -4,8 +4,9 @@ function ee_mod_setup_postfix()
 {
 	ee_lib_echo "Configuring Postfix, please wait..."
 	#Configure Master.cf
-	sed -i 's/#submission/submission/' /etc/postfix/master.cf
-	sed -i 's/#smtps/smtps/' /etc/postfix/master.cf
+	sed -i 's/#submission/submission/' /etc/postfix/master.cf &&
+	sed -i 's/#smtps/smtps/' /etc/postfix/master.cf \
+	|| ee_lib_error "Unable to setup details in master.cf file, exit status = " $?	
 
 	#Configure main.cf
 	#postconf "#smtpd_tls_session_cache_database = btree:${data_directory}/smtpd_scache"
@@ -37,7 +38,9 @@ function ee_mod_setup_postfix()
 
 	# Setting up Postfix MySQL configuration
 	mkdir -p /etc/postfix/mysql
-	cp -av /usr/share/easyengine/mail/virtual_alias_maps.cf /etc/postfix/mysql/virtual_alias_maps.cf
-	cp -av /usr/share/easyengine/mail/virtual_domains_maps.cf /etc/postfix/mysql/virtual_domains_maps.cf
-	cp -av /usr/share/easyengine/mail/virtual_mailbox_maps.cf /etc/postfix/mysql/virtual_mailbox_maps.cf
+	cp -av /usr/share/easyengine/mail/virtual_alias_maps.cf /etc/postfix/mysql/virtual_alias_maps.cf &&
+	cp -av /usr/share/easyengine/mail/virtual_domains_maps.cf /etc/postfix/mysql/virtual_domains_maps.cf &&
+	cp -av /usr/share/easyengine/mail/virtual_mailbox_maps.cf /etc/postfix/mysql/virtual_mailbox_maps.cf \
+	ee_lib_error "Unable to copy Postfix MySQL configuration files, exit status = " $?
+
 }