Following on from Rich’s post about grey-listing I ran off to the website and downloaded a copy of greyfix.
I quickly installed it, and setup postfix. I immediately noticed a difference in /var/log/mail I now receive about 20 spam messages a day, rather than over 900 a day. What an improvement.
Like Rich, I had been looking at grey listing but caved in when trying to set it up. This is so easy I’m sure most anyone could get it working. My only change from the default install is to lower the retry time from 3480 secs (58 minutes) to a lower threshold. As of yet I am still to receive a mail from an IPV6 host so I am not too worried about that limitation just yet.
