Greylisting, (anti)spam, etc
I've been working way too much lately, but at least I've taken the time to install a new spam filter on my mail server. It was actually only a very small patch to the qmail source that was needed to get it to filter mail through policyd. Policyd is primarily made for Postfix, but seems to work great with qmail too. That puts an end to my own greylisting project, which only greylisted on source-IP/24. The "greysmtpd" app was working as it should but there were too many spammers in the world to make it effective enough.
Greylisting
Min greylistingpatch till rblsmtpd (program under UCSPI-TCP) (under Projekt i menyn) körs aktivt på minst tre maskiner med goda resultat. Kapar genomsnittligt 90% av all spam i samband med första anslutningen.
Nästa steg är att koppla ihop det med p0f på något sätt.
DSpam
Verkar vara ett schysst antispam-verktyg som ska gå att integrera med de flesta MTAs. Själv föredrar jag av olika anledningar qmail, även om jag börjat titta på Postfix också.
chkuser
kontrollerar giltiga e-postadresser innan mailen köas i qmail. funkar med vpopmail.
qmail-rblchk i .qmail
http://morettoni.net/qmail-rblchk.en.html
Verkar schysst. Will try...