And how to set them up? I tried to prescribe the alias, in the /etc/postfix/aliase test: user1@mydomen.su.
Then executes the command: postalias /etc/postfix/aliase and /etc/init.d/postfix reload
when sending error is presented on test@mydomen.su - Recipient address rejected: User unknown in virtual mailbox table.
That is, the user receives a mail if user1@mydomen.su send an email to - test@mydomen.su. I use LDAP to connect to the AD