Francesc Pe?alvez: > There are some ips that when wanting to connect with my postfix it is > impossible to do so when connecting in the same second they disconnect > without sending any data > for example: > > Sep 26 21:20:47 ns postfix / smtpd [4679]: connect from > mail2.segurcaixaadeslas.es [195.77.158.25] > Sep 26 21:20:47 ns postfix / smtpd [4679]: disconnect from > mail2.segurcaixaadeslas.es [195.77.158.25]
This requires a network recording, because the client does not send any commands (I assume that you have Postfix 3.0 or later). See http://www.postfix.org/DEBUG_README.html Wietse