On 11/21/2019 10:18 AM, Fazzina, Angelo wrote:
Thank you for clearing that up.
Since this client I have is having trouble and I am trying to determine if the 
clients IP is the one generating these log entries do you think these to 
settings will give me more info in the logs for smtpd related data ?

   debug_peer_level (x)
and
   debug_peer_list (y)


For the unknown[unknown] connections, postfix doesn't know the peer, so the above won't give any additional information.

You might be able to use a packet sniffer such as tcpdump or wireshark to see the connecting IP before it drops.


  -- Noel Jones

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