DKIM fail (no key for signature)

[Guilourd]

Versions

• Windows Server Version: Windows Server 2019
• Exchange Version: 2019 CU 13
• Installed DKIM Exchange Version: 3.4

Description

DKIM is not signing messages

Steps to Reproduce

1. install and configure DKIM
2. messages arrived with dkim=fail (no key for signature)

Expected behavior:
be able to check/troublooshoot this (I don't know where are the log)
messages should be received with dkim=pass

Actual behavior:

1. install and configure DKIM
2. DKIM agent has the last priority
3. no specific transport agent
4. test send message with send-message or telnet
5. messages arrived with dkim=fail (no key for signature)

I hope you will be able to help because I don't see any reason
the installation has been done with no issue
service already restarted

[Guilourd]

it still failing
I have seen that I have a error message in event log, maybe it is linked ?

Agent 'Exchange DkimSigner' went async but did not call Resume on the new thread, while handling event 'OnCategorizedMessage'

[Guilourd]

after reinstall the tools, it is works
don't know what did happen exactly

[Guilourd]

I do not understand, some times it is works and some times it is not working.
How can I fix this once for all? can someone help me ?

dkim=fail (no key for signature)