Tomas Garijo (Click): > Jul 16 13:01:28 smtp1 postfix/qmgr[936]: AC7442600BD: from=<>, size=4982, > nrcpt=1 (queue active)
If the remote mail server rejects mail from <>, then it does not fully implement the SMTP protocol. Meanwhile, you need to find out why YOUR machine is sending such mail. Perhaps you are accepting mail for users that don't exist? Don't do that. Your system will be blacklisted. Wietse