Merge branch '6118-enable-receiving-inverted' into 'develop'

fix 'enable receiving' checkbox

Closes #6118

See merge request ispconfig/ispconfig3!1457

install/tpl/mysql-virtual_email2email.cf.master

@@ -2,7 +2,7 @@ user = {mysql_server_ispconfig_user}
 password = {mysql_server_ispconfig_password}
 dbname = {mysql_server_database}
 hosts = {mysql_server_ip}
-query = SELECT email FROM mail_user WHERE email = '%s' AND forward_in_lda = 'n' AND disabledeliver = 'n' AND disablesmtp = 'n' AND server_id = {server_id}
+query = SELECT email FROM mail_user WHERE email = '%s' AND forward_in_lda = 'n' AND disabledeliver = 'n' AND postfix = 'y' AND server_id = {server_id}
            AND EXISTS (SELECT domain_id FROM mail_domain WHERE domain = SUBSTRING_INDEX('%s', '@', -1) AND active = 'y' AND server_id = {server_id})
         UNION
         SELECT cc AS email FROM mail_user WHERE email = '%s' AND cc != '' AND (forward_in_lda = 'n' OR disabledeliver = 'y') AND disablesmtp = 'n' AND server_id = {server_id}