Hello, I believe my request is very simple, but I don't find how I can do that. When you receive a NDR from postfix server, the mail is sent by MAILER-DAEMON@hostname.local. I would to change the sender. I've seen you can modify master.cf, by adding "null_sender=" values in a pipe, but it does not work. Is it really possible?
Here you can find an example:
maildrop unix - n n - - pipe
flags=DRhu null_sender=jean...@gmail.com user=vmail
argv=/usr/local/bin/maildrop -d ${recipient}
Thanks,
Jean-Luc
