LuKreme said to use: check_sender_access hash:/etc/postfix/mydomain
== mydomain example.com REJECT you cannot send on behalf of example.com .example.com REJECT you cannot send on behalf of example.com can I use: check_sender_access proxy:mysql:/etc/postfix/mysql-virtual_domains.cf and if so, what entry should I add in mysql db mail table domains? thx, Cameron