Hi Today I got an emergency call from our security team: their mailing list was "spammed" from a bot (aka ticket system) - as the ticket system address (which looks it was in CC of one Email to the list) generated an Email to the list - getting an answer from mlmmj that it is not subscribed, which generated a new ticket with an automated answer, which was answered by mlmmj... (I think you got the loop) As result, I created /etc/postfix/sender_access with : $EMAIL DROP inside, did "postmap /etc/postfix/sender_access" and adapted /etc/postfix/main.cf : smtpd_recipient_restrictions = [...],check_sender_access hash:/etc/postfix/sender_access For the moment, this seems to successful break the loop, but as I'm neither the maintainer of the system nor sure that this is a good/stable solution, I hope that I simply did not break too much... Feel free to adjust/remove/whatever with the above information. Maybe someone has already a better idea...? with kind regards, Lars -- To unsubscribe, e-mail: heroes+unsubscribe@opensuse.org To contact the owner, e-mail: heroes+owner@opensuse.org