I suspect this is due to a "reject_unknown_sender_domain" instruction in the smtpd_recipient_restrictions clause. As long as your whitelist check comes first, you can skip the requirement.
Assuming it fits the facts, maybe try something like: check_sender_access hash:/etc/postfix/sender_access Rich Shepard <[email protected]> wrote: > There is a domain being rejected by postfix because 'host not found.' I >put that domain name in /etc/postfix/rhsbl_sender_exceptions with an 'OK'. >This has resolved the issue for many other domains, but not this one. A >typical log entry is: > >Jul 6 04:42:19 salmo postfix/smtpd[20260]: connect from >mail.hornady.com[69.20.192.122] >Jul 6 04:42:21 salmo postfix/smtpd[20260]: NOQUEUE: reject: RCPT from >mail.hornady.com[69.20.192.122]: 450 4.7.1 <barracuda.hornady.com>: Helo >command rejected: Host not found; from=<> to=<[email protected]> >proto=ESMTP helo=<barracuda.hornady.com> >Jul 6 04:42:21 salmo postfix/smtpd[20260]: disconnect from >mail.hornady.com[69.20.192.122] > > Is this a mal-formed message at the sender's end (notice noting in the >from=<> in the 5th line)? > > Please suggest how I can tweak postfix to receive messages from this >domain. > >Thanks, > >Rich > >_______________________________________________ >PLUG mailing list >[email protected] >http://lists.pdxlinux.org/mailman/listinfo/plug _______________________________________________ PLUG mailing list [email protected] http://lists.pdxlinux.org/mailman/listinfo/plug
