Emails that could not be processed

Infos:

• Used Zammad version: 6.3.1-1721648661.efd003fa.focal
• Used Zammad installation type: (source, package, docker-compose, …)
• Operating system: Windows 11
• Browser + version: Edge, last one

Expected behavior:

• While checking on monitoring page I see this error below

Actual behavior:

• emails that could not be processed: 92

Steps to reproduce the behavior:

• Could I know what email are not processed and why?