Good evening to all,
sorry for the bad english, I'm Italian

I have a problem with piped scripts:

on a server with ZCS 7.2.0 I followed this wiki page and everything works
Configuring Postfix to work with piped scripts - Zimbra :: Wiki

on another server with ZCS 8.0, the procedure does not work, apparently the transport file is ignored and the system reports:

5.1.1 Recipient address rejected: User unknown in virtual mailbox table
I tried to solve it with /etc/aliases & /opt/zimbra/postfix/conf/virtual

here I can not make virtual to route correctly to the script in /etc/aliases

I get the error:

<mypipe@my.system.hostname>: Mail for my.system.hostname loops back to myself
any ideas?