How do fix a good solution against spam..

[roberto at redix.it]

> Heya folks
>
> First of all, sorry if this isn't the correct list, but yet, I think spam
> is a kind of network attack and should be treated as a security issue..
> I run a working mail server using Postfix, MySQL, Courier-IMAP,
>SpamAssassin and ClamAV (amavisd-new)
...
> Regards,
> Jesper Wallin
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I'm trying to solve the spam problem on my email server too.

I'm glad to share my and your ideas on the topic.

At the moment I can suggest the following:

 1) use Realtime Black List (see http://spamhaus.org for example);
 2) use Sender Policy Framework (see http://spf.pobox.com);
 3) accept email only after the sender had confirmed your reply;
 4) use spamassasin;

N.B.: only 1,2 save your bandwidth as the SMTP transaction is blocked if
necessary;

Any comments are welcome,
Regards,
Roberto