Is it possible to forward or download any undeliverable message on SMTP Log ?
Hallo Sinan and welcome to the UTM Community!
I'm not sure what you're showing us. Is this an email sent by something behind the SMTP Proxy that it couldn't deliver or???
Cheers - Bob
Hello Bob. The recipient is our microsoft tenant username firstname.lastname@example.org. I've logged on codetwo with that and buyed a licence. The email address does not exist but our supplier send email to this address and there is no way to re-send it.