[Exim] exim 4.24 protocol violation

Hello list,

I have many of these

SMTP protocol violation: synchronization error (input sent without waiting for
greeting): rejected connection from H=...


in my logentries, I didn't had this in exim 3.36.
Is there a configuration error in my exim ?

Thanks for any help in advance.

Thomas.

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Thomas Baumann // tirili+list.exim@???