This howto describes one way to build a scalable, secure, full-featured mail platform. It offers virtual hosting of mailboxes in maildir format with support for quotas and server-side filtering, domain aliasing, address aliasing, address forwarding, catchall addresses. Relaying is secured with STARTTLS and SMTP-AUTH. Incoming mails are checked for viruses, spam, and checked against SPF policy and DNSBL.

This tutorial shows how to set up an Ubuntu Hardy Heron (8.04 LTS) based server as a spamfilter in gateway mode. In the end, you will have a SpamSnake Gateway which will relay clean emails to your MTA. You will also be able to view your incoming queue, train your SpamSnake and carry out a few more advanced operations via MailWatch.

Ultimamente ricevo molte segnalazioni da utenti della rete in merito ad un incremento del traffico dovuto a mail di Spam ed in particolare a e-mail di errore che tornano indietro, ed arrivano nel nostro account, da vari "Mailder-Daemon" o "Postmaster" come se noi avessimo inviato quelle e-mail di Spam o Virus ad altri utenti. Vediamo come difendersi dalle e-mail di Failure-Notice inviate verso il nostro account e-mail da vari Mailder-Daemon e Postmaster, rispetto a mail che noi non abbiamo mai inviato.