Hi, > On 17 juin 2020, at 15:42, Bastian Blank > <bastian+postfix-users=postfix....@waldi.eu.org> wrote: > > On Wed, Jun 17, 2020 at 02:37:23PM +0200, Patrick Proniewski wrote: >> For some time now I notice that some messages, either originating from >> Internet or from internal servers are bounced when they arrive on the last >> hop: Exchange. >> Jun 17 12:34:20 postfix-mailgw/smtp[77347]: 57F56EB256: >> to=<login@exchg.domain>, orig_to=<userpart@domain>, >> relay=Exchange-VIP[Exchange-VIP]:25, delay=0.01, delays=0.01/0/0/0, >> dsn=5.6.7, status=bounced (SMTPUTF8 is required, but was not offered by host >> Exchange-VIP[Exchange-VIP]) > > You have the two options to > - make Exchange support SMTPUTF8 or
Not possible yet. A flag exists for Exchange 2019 but we are running 2016 now and upgrade is not scheduled for now. > - disable SMTPUTF8 in Postfix. That means disabling it everywhere and let messages bounce on MX servers. Would not really change anything in the end. patpro
