Hi, I'm using smtpd_sender_restrictions = check_sender_access hash:/etc/postfix/allowed_sender
to make sure, my senders only send out with pre-defined and allowed domains. Now i noticed, that if my users acknowledge "read confirmations" in clients, mails in the following form arrive at postfix: from=<> to=<m...@customer.tld> proto=ESMTP helo=<W8PPCN130916> and will be rejected as empty mail from is not allowed by check_sender_access. Howto deal with that?
