Now, mail expands before it's sent to filter. But, even though the alias expands, I only have one mail to pass the filter. At this time with some recipients instead of only one, See the logs.
Only one mail with ID 1EE52203E5 Sep 7 11:29:08 smail postfix/smtpd[11325]: connect from unknown[x.x.x.x] Sep 7 11:29:08 smail postfix/smtpd[11325]: 1EE52203E5: client=unknown[x.x.x.x] Sep 7 11:29:08 smail postfix/cleanup[11329]: 1EE52203E5: message-id=<00bc01d0e94f$a9757600$fc606200$@XXX> Sep 7 11:29:08 smail postfix/qmgr[11279]: 1EE52203E5: from=<sender1@mycompany>, size=8388, nrcpt=2 (queue active) Sep 7 11:29:08 smail postfix/pipe[11331]: 1EE52203E5: to=<user2@externalcompany>, orig_to=<group1@mycompany>, relay=filter, delay=0.13, delays=0.1/0.03/0/0, dsn=2.0.0, status=sent (delivered via filter service) Sep 7 11:29:08 smail postfix/pipe[11331]: 1EE52203E5: to=<user1@mycompany>, orig_to=<group1@mycompany>, relay=filter, delay=0.13, delays=0.1/0.03/0/0, dsn=2.0.0, status=sent (delivered via filter service) Sep 7 11:29:08 smail postfix/qmgr[11279]: 1EE52203E5: removed I need pass mail through the filter separately with all recipients. I don't know if it's possible, or I have to modify the filter to make it. -- Antonio