+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
+sudo postmap hash:/etc/postfix/veli-velo.org/virtual_alias