On 1/30/2015 10:41 AM, James B. Byrne wrote: > I see this in our maillog: > > Jan 30 11:15:47 inet08 postfix-p25/smtpd[4796]: NOQUEUE: reject: RCPT > from unknown[69.17.131.33]: 450 4.7.1 <mail4OA.4office.com>: Helo > command rejected: Host not found; from=<x...@4office.com> > to=<y...@harte-lyne.ca> proto=ESMTP helo=<mail4OA.4office.com> > > > dig -x 69.17.131.33 > > ; <<>> DiG 9.8.2rc1-RedHat-9.8.2-0.30.rc1.el6_6.1 <<>> -x 69.17.131.33 > ;; global options: +cmd > ;; Got answer: > ;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 28665 > ;; flags: qr rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 2, ADDITIONAL: 2 > > ;; QUESTION SECTION: > ;33.131.17.69.in-addr.arpa. IN PTR > > ;; ANSWER SECTION: > 33.131.17.69.in-addr.arpa. 19371 IN PTR mail4oa.4office.com. > > The dig was run on the host rejecting the mail. Any ideas as to what > is happening here? Am I missing something obvious? > >
The helo hostname, mail4OA.4office.com, does not exist. You can tell from the "helo command rejected: host not found" in the log. -- Noel Jones
