/etc/postfix/$local_domainname/transport
sudo postmap hash:/etc/postfix/$local_domainname/transport
sudo postmap hash:/etc/postfix/$local_domainname/virtual_alias
+sudo postmap hash:/etc/postfix/chatperche.org/virtual_alias
sudo postmap hash:/etc/postfix/cyclocoop.org/virtual_alias
sudo postmap hash:/etc/postfix/lesjantesdunord.org/virtual_alias
sudo postmap hash:/etc/postfix/ptitvelo.net/virtual_alias