[EMAIL PROTECTED] (Bruno Prior) writes: > My ISP has just pointed out to me that I was running an open relay, > which is highly embarrassing. I have been running postfix without > causing a problem until I switched to an ADSL connection. The notes in > postfix/main.cf seem to make it pretty clear what the problem is: my > ISP's subnet had been added as a trusted subnet, as ADSL counts as a > dialup connection, which meant that anyone on their network could relay > through my mail server. > > Obviously, the fault is principally mine, for not being more careful > when I set ADSL up - the information is all there if you look for it. > But I was wondering how many people would look for it. Because, if you > setup ADSL using drakconnect, you wouldn't have a clue you needed to > edit main.cf to prevent this. Would it be a good idea to either enhance > drakconnect to make this change automatically (if you could figure out a > sensible way to deduce the appropriate list of trusted clients), or at > least flag up a warning, to stop other people making this mistake?
Hi there, This is FALSE. The default postfix configuration is binded to localhost. So if, for some season, you bind your localhost to your external IP address, then your postfix is, indeed, acting as a open relay. You might have miscofigured your network ... cheers, -- Florin http://www.mandrakesoft.com http://people.mandrakesoft.com/~florin/
