> Le 9 juil. 2015 à 20:09, Viktor Dukhovni <postfix-us...@dukhovni.org> a écrit > : > > On Thu, Jul 09, 2015 at 07:43:17PM +0200, Alexandre Ellert wrote: > >> I have an inbound MX in front of an Exchange Server and I?d like to DISCARD >> email when Exchange answer "554 5.1.0 Sender Denied" (and avoid backscatter) >> Is it possible to do something like that with Postfix ? > > No. Instead work with the Exchange administrators to not do that, > the relevant access control policy should be implemented in the > public MX host, rather than on internal mail relays. > > -- > Viktor.
This error message appears when an Outlook end user right click on an email and choose Junk -> Block sender. I will ask the Exchange admin if it’s possible to retrieve a list and then upload it to a Postfix access table. Alexandre
