for some reason I’d like to use SMTP authentication with an internal SMTP-Gateway, which is a Exchange 2016.
However, the server replies with a
(The username/credentials are double checked).
My Libre server is using this NTLM Negotiation Message (from what a tcpdump told me):
AUTH NTLM TlRMTVNTUAABAAAABzIAAAAAAAAgAAAAAAAAACAAAAA=
So far I have debugged, that a NTML Negotiation Message of (SMTP embedded)
AUTH NTLM TlRMTVNTUAABAAAAt4II4gAAAAAAAAAAAAAAAAAAAAAFAs4OAAAADw==
AUTH NTLM TlRMTVNTUAABAAAABzIAAAYABgArAAAACwALACAAAABXT1JLU1RBVElPTkRPTUFJTg==
would work, because the Exchange server would reply with a
SMTP 334 containing the NTLM challenge message.
(When base64-decoding, all these strings begin with “NTLMSSP”… which seems pretty OK…)
I guess that the code for this NTML authentication is not LibeNMS, but the laravel framework…
However, is there somebody who can give me a hint how to change this behavior or where to adress it to?
Is there somebody who can confirm that NTML is working/not working with Exchange 2016?
(Yes, I do agree that I sould look into the Exchange logs… but there’s no way for me to do so…)
Thanks a lot for your help!