* Ralf Hildebrandt <ralf.hildebra...@charite.de>: > Which Postfix restriction generates: "Helo command rejected: Domain not > found"? > > From the log on albatross.python.org: > > Aug 21 15:07:07 albatross postfix/smtpd[15378]: NOQUEUE: reject_warning: RCPT > from qmta09.emeryville.ca.mail.comcast.net[76.96.30.96]: 554 5.0.0 > <QMTA09.emeryville.ca.mail.comcast.net>: Helo command rejected: Domain > not found; from=<rickbk...@comcast.net> to=<python-l...@python.org> > proto=ESMTP helo=<QMTA09.emeryville.ca.mail.comcast.net>
BTW, this log entry in itself proves that the DNS name must resolved back and forth, because otherwise postfix would have logged "unknown[76.96.30.96]" instead of qmta09.emeryville.ca.mail.comcast.net[76.96.30.96] -- which was also the HELO hostname! -- Ralf Hildebrandt Geschäftsbereich IT | Abteilung Netzwerk Charité - Universitätsmedizin Berlin Campus Benjamin Franklin Hindenburgdamm 30 | D-12203 Berlin Tel. +49 30 450 570 155 | Fax: +49 30 450 570 962 ralf.hildebra...@charite.de | http://www.charite.de
