[Exim] connection from [194.136.69.18] refused (failed to fi…

Hello, exim-users.

I am sorry for this dumb question, but how to tell my Exim 3.3x
to not refuse mail from IP address without hostname. I know, it
should be easy, but I have not found it in docs :)

Please CC answer to my email, I am not subscribed to exim-users.

Thanks!

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mike@???, ICQ: 9664018