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mbx2mbox converts Microsoft Outlook Express .mbx files into standard mail files (mbox) that programs like Pine, Mutt, and Netscape can parse. Usage: mbx2mbox file1.mbx file2.mbx ...

milter manager protects you from spam mails and virus mails effectively with milter. milter manager has embedded Ruby interpreter to control milters flexibly.

The skem utility is a sendmail milter, that checks and maintains a list of whitelisted, temporary banned, and permanently blacklisted IP-addresses. How you obtain the entries is up to you, but the included logwatcher module provides one possibility. The list is stored in a directory, each entry being a file (usually -- zero sized) or a symlink (usually -- a "broken" one). Such entries are stored efficiently (within the directory itself) and the directories are searched using the hash tables on modern file systems. At the same time, they can be listed, added, and removed with the simple ls(1), touch(1), and rm(1). This milter does not itself filter spam, instead it memorizes the verdicts issued by your other anti-spam defenses to reduce the system load and resource consumption, by temporarily rejecting the relays suspected of spamming (banned) and, optionally, by permanently rejecting the relays "convicted" of spamming (blacklisted). The idea is to stem the spam from real spam sources, while reducing the ill effects of false-positives to merely delaying, rather than rejecting future messages.

There really isn't much to say, noattach is a milter that parses the body of email messages from sendmail and checks if the filename of attachments matches one of the regular expressions in a given pattern file and rejects those emails that match. Filenames are rfc2047 or rfc2231 decoded if needed. This program needs sendmail version 8.12.2 or newer to be compiled with libmilter.

OSBF-Lua (Orthogonal Sparse Bigrams with confidence Factor) is a Lua C module for text classification. It is a port of the OSBF classifier implemented in the CRM114 project. This implementation attempts to put focus on the classification task itself by using Lua as the scripting language, a powerful yet light-weight and fast language, which makes it easier to build and test more elaborated filters and training methods.

FuzzyOcr is a plugin for SpamAssassin which scans image attachments for spam keywords, using an Optical Character Recognition program. This plugin can be used to detect spam that puts all the real spam content in an attached image. The mail itself only random text and random html, without any URLs or identifiable information. It is also able to do approximate matches on words, so errors in recognition or attempts to obfuscate the text inside the image will not cause the detection to fail.

A Perl module used by websieve for creating Sieve scripts on an Cyrus IMAP mail server. Sometimes also referenced as 'perlsieve'.

POP3VScan is a transparent POP3-Proxy with virus-scanning capabilities. This means that all your POP3-Clients in the Network can't fetch mails from the internet without that POP3VScan have scanned it. If a virus has been found the mail is replaced with a notification and the original (infeceted) version is stored on the harddisc. Transparent means, that neither the client nor any of the used POP3-servers has to be configured.

python-policyd-spf is a Postfix SMTPd policy engine for SPF checking. It is implemented in pure Python and uses the python-spf module.

This software provides an easy and functional way to audit incoming and outgoing e-mails from a qmail server. It works by means of qmail-queue wrapping. It has a control file which allows selective auditing of sender or recipient, as well as whom the messages should be forwarded to. This control file allows regular expressions, what increases its flexibility of use.