This is a port of Emmanuel Dreyfus' milter-greylist.
Grey listing is a wonderful spam filtering technique, which uses a behavior
trick: spammers never resend a message when they get a temporary error,
whereas real MTA do. The idea is to refuse any mail on first attempt, and
accept it after some time has elapsed.
milter-greylist is a stand-alone milter written in C that implement grey
qSheff is a wrapper for the qmail queue that scans email for viruses and
spam. Infected messages are rejected before they reach the queue, so the
server doesn't perform any job for them. After checking the message, it
will wake the qmail queue. Some of the supported features:
- Antivirus executing (ClamAV)
- Header and body filtering
- Subject filtering
- Attachment blocking
- Quarantine support
- White/black lists
- Single line logging for qmail
- Basic DoS attack prevention
- And much more...
hinfo is a utility that will display information about a host. It is
primarily designed to find the owner of an IP block in order to direct
spam complaints to where they may do some good.
(maintainer's note: the DATAFILES are updated without the port version
necessarily being updated. Expect drift on distinfo. See hinfo-update.)
Although the home page of the software is at www.blars.org/hinfo.html,
that page is not reachable from the FreeBSD.org domain.
Yadis is a service discovery system allowing relying parties
(aka identity consumers or membersites) to determine automatically,
without end-user intervention, the most appropriate protocol to use.
Examples of such services are:
* Single sign-on across web sites
* Profile exchange and form filling
* Blog anti-spam
Yadis provides the first step for any service that uses identifiers for
authentication, accountability, privacy controlled data exchange and more.
dbacl is a digramic Bayesian text classifier. Given some text,
it calculates the posterior probabilities that the input resembles
one of any number of previously learned document collections.
It can be used to sort incoming email into arbitrary categories
such as spam, work, and play, or simply to distinguish an English text
from a French text. It fully supports international character sets,
and uses sophisticated statistical models based on the
Maximum Entropy Principle.
It's a lightweight, fast and reliable Sendmail milter that implements
a real-time Sender e-Mail Address Verification technology. This technology
can stop some kinds of SPAM with a spoofed sender's e-Mail address.
Also it implements a real-time Recipient e-Mail Address Verification
technology. It can be useful if your machine is a backup MX for the recipient's
domains or if your machine forwards all e-Mail messages as a relay host for your
domains to another internal or external e-Mail servers.
It's a lite alternative for the spamilter, milter-sender and milter-ahead
This is a simple sendmail milter which adds an X-RBL-Warning header to
any emails that are received that come from an open relay as
determined by your choice of RBL checking service (i.e. bl.spamcop.net).
This is useful if you'd rather have the mail user agent (MUA) deal with
potential spam rather than just blocking it in case you loose
legitimate messages. Note that the X-RBL-Warning header is only set if
the site was found to be an open-relay.
This plugin implements logging functionality for your webmail interface.
You can choose to log to a database, a file, your system log, or any
combination thereof. You can also choose which kinds of events to log,
including login events, logout events, login error events, all outgoing
messages, possible outgoing spam messages, and other error events.
Also included is monitoring functionality that will send alert emails to
the administrator when certain events trigger.
If you use the timeout_user plugin, logout events caused by user timeouts
will be captured.
Log message format is also completely custom-defined to meet your needs
in the configuration file.
E-MailRelay is a simple SMTP proxy and store-and-forward message transfer
agent (MTA). When running as a proxy all e-mail messages can be passed
through a user-defined program, such as a spam filter, which can drop, re-
address or edit messages as they pass through. When running as a store-
and-forward MTA incoming messages are stored in a local spool directory,
and then forwarded to the next SMTP server on request.
E-MailRelay can also run as a POP3 server. Messages received over SMTP
can be automatically dropped into several independent POP3 mailboxes.
pxytest is a command line utility to test a host for open proxies
that are vulnerable to spammer abuse. It is written in perl.
Unsecured proxies currently are the most significant conduit of
junk email. This is a particularly vexing problem, because open
proxies, unlike open mail relays, hide the origin of the spam,
making it impossible to trace. This utility tests a host to
see if it is vulnerable to such abuse.
See http://www.unicom.com/sw/pxytest for more information.
pxytest was written by Chip Rosenthal.