Spamassassin

[Ugo Bellavance]

For everyone's info, I looked the descriptions of the software that can work
with MailScanner:


Spamassassin:

 The spam-identification tactics used include:

    *header analysis: spammers use a number of tricks to mask their
identities, fool you into thinking they've sent a valid mail, or fool you
into thinking you must have subscribed at some stage. SpamAssassin tries to
spot these.
    *text analysis: again, spam mails often have a characteristic style (to
put it politely), and some characteristic disclaimers and CYA text.
SpamAssassin can spot these, too.
    *blacklists: SpamAssassin supports many useful existing blacklists, such
as mail-abuse.org, ordb.org or others.


Razor:

Collaborative spam filtering network allowing users to report and filter out
matching spam.

DCC:

The DCC or Distributed Checksum Clearinghouse is a system of thousands of
clients and more than 150 servers that collects and count checksums related
to several million mail messages per day, most as seen by Internet Service
Providers. The counts can be used by SMTP servers and mail user agents to
detect and reject or filter spam or unsolicited bulk mail. DCC servers
exchange or "flood" common checksums. The checksums include values that are
constant across common variations in bulk messages, including
"personalizations."

Pyzor:

 Pyzor is a collaborative, networked system to detect and block spam using
identifying digests of messages.

Pyzor initially started out to be merely a Python implementation of Razor,
but due to the protocol and the fact that Razor's server is not Open Source
or software libre, I decided to impelement Pyzor with a new protocol and
release the entire system as Open Source and software libre.

Since the entire system is released under the GPL, people are free to host
their own independent servers. Server peering is planned for a future
release.