Am 30.05.2014 13:51, schrieb Selcuk Yazar: > i think from=<> is empty or unknown
you should not think, you should learn some basics *before* setup public MTA's <> is the NULL sender used for bounces, responders and sender verifyication you *MUST* accept that sender by RFC http://en.wikipedia.org/wiki/Bounce_message > also this messages comes from log 4-5 times per second. we think some kind > attack or mallware thing. but i'm not sure RCPT from >> xedge2.campus.tue.nl <http://xedge2.campus.tue.nl/>[131.155.6.117] maybe *you are* the root cause sending out bogus mails via a hacked account or backscattering and other misconfigured servers are sending bounces instead reject > ip is real or not ? also the user in from part of log is a driver(no > offence), i 'm sure he looks mail once a day, > and he is on vacation . :) > > thanks in advance. > > On Fri, May 30, 2014 at 2:35 PM, Wietse Venema <wie...@porcupine.org > <mailto:wie...@porcupine.org>> wrote: > > Selcuk Yazar: > > May 30 10:00:04 mail postfix/smtpd[6756]: NOQUEUE: reject: RCPT from > > xedge2.campus.tue.nl <http://xedge2.campus.tue.nl>[131.155.6.117]: 450 > 4.7.1 <>: Sender address rejected: > > Access denied; from=<> to=<u...@domain.edu.tr > <mailto:u...@domain.edu.tr>> proto=ESMTP helo=< > > XEDGE2.campus.tue.nl <http://XEDGE2.campus.tue.nl>> > [three more examples rejecting mail from <>] > > Why are you rejecting mail from <>? > > TO REPORT A PROBLEM see http://www.postfix.org/DEBUG_README.html#mail > > TO (UN)SUBSCRIBE see http://www.postfix.org/lists.html > > Thank you for using Postfix.
