Merge branch 'patch-3' into 'stable-3.1'

Fix Catchall Greylisting

See merge request !647

Author: Till Brehm

install/tpl/mysql-virtual_policy_greylist.cf.master

@@ -1,5 +1,5 @@
 user = {mysql_server_ispconfig_user}
 password = {mysql_server_ispconfig_password}
 dbname = {mysql_server_database}
-query = SELECT 'greylisting' FROM (SELECT greylisting, source AS email FROM mail_forwarding WHERE server_id = {server_id} UNION SELECT greylisting, email FROM mail_user WHERE server_id = {server_id}) addresses WHERE addresses.email='%s' AND addresses.greylisting='y'
+query = SELECT 'greylisting' FROM (SELECT greylisting, source AS email FROM mail_forwarding WHERE server_id = {server_id} UNION SELECT greylisting, email FROM mail_user WHERE server_id = {server_id}) addresses WHERE addresses.email='%s' AND addresses.greylisting='y' UNION SELECT 'greylisting' FROM `mail_forwarding` f CROSS JOIN `mail_user` u ON u.email = f.destination WHERE f.type = 'catchall' AND u.greylisting = 'y' AND u.server_id = {server_id} AND f.source = '@%s'
 hosts = {mysql_server_ip}