Il 2017-10-02 18:13 Noel ha scritto: [..]
DKIM will stop forged senders in your domain, but it won't stop mail to a random recipient in your domain. Each server *must* have a list of valid recipients. The secondary MX will use relay_recipients_maps for this. You can still use postscreen independently on both servers, but the two postscreen instances can't share information. For further info on postfix config, please see the postfix docs or ask on the postfix-users list since this is off-topic for spamassassin. -- Noel Jones
Perfect! Very very thanks Noel and all of you! Davide