I think it's a good idea to be able to add reason, when I add a email or IP address in postfix blacklist. I trying to add firstname.lastname@example.org as blacklist sender and send from this mail. When send mail I received mail on email@example.com from mailer demon: said: 554 5.7.1 <firstname.lastname@example.org>: Sender address rejected When opening ispconfig db and find email@example.com I add after REJECT (spacekey)You are banned. REJECT You are banned. and update table. When send new messege from firstname.lastname@example.org mailer demon said: 554 5.7.1 <email@example.com>: Sender address rejected: You are banned. Sorry for my bad english..