Permission Error #40
Description
I have SMTP2GRAPH running on Windows Server 2025 as a Service. With a local admin account running the service. And the local admin account has full control of the SMTP2GRAPH directories. And the relay is connected to M365 via Application Registration. So far this system has worked great and I am using it daily probably processing 100 emails.
I have an issue with one of my systems, when SMTP2GRAPH gets the emails for it. They get stuck in the temp folder and never move to queue. The logs show a permission error when attempting to rename and move the file to the queue folder. Attached are logs and eml files that failed. I did have a EDR running on the server and thought it may have been putting a file lock on the file. But I disabled the EDR and the issue still occurs. The system sending the email to SMT2GRAPH may be sending a batch of 5 emails at the same time. And it seems 1 always fails. No pattern to the sender besides they are always in BCC. I do not have a threshold configured on max emails sent out. Also below is my config file with the sensitive info removed.