we also have the same or at least a similar problem. However not with every
mail but with most. We were so far also unable to find the root cause for this
and can't see any distinctive differences between mails that fail to restore
and those that don't. In our specific setup piler is using a postfix server as
smart host which then redirects the messages to exchange online via a transport
rule. EXO accepts the restored messages our postfix sends but never delivers
them to the inbox.
Looking at the message trace in EXO shows that the message is beeing recived
but there are no detailed trace infos available.
Out first guess was also that EXO doesn't like recveiving messages with the
same message ID multiple times. We haven't tried REWRITE_MESSAGE_ID yet but
based on what Alex wrote this seems to not solve the problem.
Von: Karl Rossing <karl.ross...@gmail.com>
Gesendet: Freitag, 16. April 2021 17:54
An: Piler User
Betreff: Re: Restore to O365 fails
We have had the same problem. I meant to open a ticket with Microsoft but so
far have not.
On Fri, Apr 16, 2021 at 8:53 AM Alexander Noack
I do realize that this is very likely not a Piler issue but rather O365
related… but maybe somebody already came across this issue and knows how to
When I restore a deleted email in my O365 account, the message transfer always
550 4.3.2 QUEUE.TransportAgent; message deleted by transport agent
The Piler server is setup as a connector in Exchange Online. The Smarthost is
Mails seem to be originating from
The error states that there is an NDR sent to that address, but even after
assigning that address to myself, no NDR is ever received.
I have set $config['REWRITE_MESSAGE_ID'] = 1;
Any help is greatly appreciated!