Thank you all for replying. I really do appreciate your input. When the first extract from the log is pretty obvious as it says scan, the second one is not really clear to me. Did the client try to connect in order to send mail? Does postfix/smtp/smtpd mean sending out? I just assume it but I am not sure. For example when mail arrives I see postfix/smtpd when it goes out I see postfix/submission/smtpd and this is understandable, but seeing postfifix/smtp/smtpd makes me confused a little...
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