Hi To apply SPF to control mails as well as spoofing users and more. - I have a server with postfix mail for local users which is assigned to use SASL to prevent spoofing mails. - I have a postfix mail sever face as internet gateway both cases Debian. and Bind9 the internet facing server and enable SPF to prevent from outside can send emails to my local domain as if they were internal users ?? spamassasin use and amavisd-new also As might enable it ???