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 remediate it.
When I restore a deleted email in my O365 account, the message transfer
always fails:
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 <tenant-domain>.mail.protection.outlook.com.
Mails seem to be originating from
MicrosoftExchange329e71ec88ae4615bbc36ab6ce41109e@<tenant>.onmicrosoft.com
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!
Alex
