Fix Mailman so it would not require too permissive Postfix settings
In order for Mailman to work properly, the localhost addresses should be whitelisted, and "permitmynetworks" directive specified in the "smtpdclient_restrictions" of Postfix configuration.
However, these setting let the unauthenticated users sending SPAM via PHP scripts.
Thank you for your input!
As far as I know, Mailman hasn’t any ability to authorize itself on mail servers, so the server IP should be whitelisted on the mail server. Please forward your request to Mailman developers.
Sorry, we are closing the request as it doesn’t include improvement proposal for Plesk.