Please read http://www.postfix.org/DEBUG_README.html#mail
Willi Am 23.06.2017 um 11:32 schrieb Zalezny Niezalezny: > Dear Colleagues, > > > I have a problem with my Postfix/Mailman configuration. Basicly everything > is working fine except one thing. > > When I`m sending message to mailman admins: > > From: u...@example.com > To: mailman-ow...@list.example.com > > > Postfix generating SMTP session failure. > > > Jun 23 10:59:25 2017 (18113) SMTP session failure: 501, 5.1.7 Bad sender > address syntax, msgid: <CAKPGuG9oNCPVcqH=UZu1SOqFCvTh= > qamdwf_azlcskelfoy...@mail.gmail.com> > > > So in this example, I have sent message > From: zalezny.niezale...@gmail.com > To: mailman-ow...@list.example.com > > > For some reason Postfix is not able to acceppt sender E-mail address " > zalezny.niezale...@gmail.com". My Mailman server is behind the firewall, > could it be that server is not able to resolve gmail.com domain and thats > why rejecting it ? How to solve it ? > > > > Cheers > > Zalezny >
