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MailCleaner Open Source Edition is now discontinued but will continue under the spamtagger project
https://github.com/SpamTagger
[antispam] MailCleaner is an anti-spam / anti-virus filter SMTP gateway with user and admin web interfaces, quarantine, multi-domains, multi-templates, multi-languages. Using Bayes, RBLs, Spamassassin, MailScanner, ClamAV. Based on Debian. Enterprise ready.
MailCleaner is an anti spam gateway installed between your mail infrastructure and the Internet.
It includes a complete GNU/Linux OS and a graphical web interface for user and administrative access. ...
...It offers Web content filters, ensuring better performance of the network, allowing users to use the service efficiently and securely, providing a deep control of the use of the Web access service, blocking access to unwanted websites, Virus, Spam, Applications and intrusion attempts. Its configuration is made entirely by the web interface.
...The feature suite includes stateful packet inspection firewall, application-level proxies for various protocols (HTTP, FTP, POP3, SMTP) with antivirus support, virus and spam-filtering for email traffic (POP and SMTP), content filtering of Web traffic and a "hassle free" VPN solution (based on both OpenVPN and IPsec).
Untangle is a Linux-based network gateway with pluggable modules for network applications like spam blocking, web filtering, anti-virus, anti-spyware, intrusion prevention, bandwidth control, captive portal, VPN, firewall, and more. Visit http://untangle.com
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Qexplore enables a Qmail server to analyze emails.
...Unlike other scanners for Qmail, such as Simscan or Qmail-Scanner which are inline scanners, Qexplore is an offline scanner that first write an email to a queue resident on disk, closing the qmail-smtpd communication.
It than (offline) analyzes this email to check for virus and/or spam. This design solves the problem of highly traffic smtp servers in wich a lot of concurrent SMTP connections can deny access of incoming/outgoing emails because the system is busy.
The program implements the CIDR merging with whitelisting (network exclusion). Output will be summarized to be as small as possible. The program has been widely used for blacklist merge and optimization.
FOSSWALL project is now merged under the Open Source Security Network (OSSN) project. Open Source Security Network is a community who are dedicated to working in different aspects of IT Security, Network Security, Application Security, Email Security etc
P3Scan is a fully transparent scanning proxy-server for email clients. It provides scanning of incoming/outgoing email messages for Virus''s, Worms, Trojans, Spam, and harmfull attachments. It can also parse messages for web-bugs.
Amber - a "grey list" for Qmail. Amber sits in the tcpserver chain, not accepting or rejecting mail but deferring connections from new IP addresses for some time (default five minutes) before it starts accepting mail from them.
kclamav is a lite and streaming version of the ClamAV virus scanner.
It is built as a Linux 2.6 kernel module and hooks via the Netfilter API.
The ClamAV virus database is loaded into kernel memory.
The library implements generic content inspection protocol API compatible with Sendmail Milter, thus allowing various applications and proxies to use Milter-compatible filters without running sendmail itself. It is here to replace Checkpoint\'s OPSEC/CV
IVS Milter is a plugin based content filtering milter. It currently supports... Virus (ClamAV) & Spam (SpamAssassin) scanning, Content-type, Attachment type & Attachment filename matching
Protect your Server/Network against spammers.
fw_spam queries a DNS-based Spam Database to detect spam listed ip-addresses.
It is a userspace daemon, wich gets the packets from the iptables QUEUE target.
You can configure the dns server, the firewall
SmartDog is anti-spam,intrution detection software for windows/linux. And, it contains many features that are all requried by a normal user to network administrator.
Visit to the home page for more clarity.
pop3filter is a transparent pop3 proxy that enable apply `on the fly' filters to
the messages that are retrieved. Enable virus detections, mail backup, spam dete
ction, mime sanitize.
IDMS DBMA is an effort to develop a highly scalable (c10k complient) plugin based mail agent aimed at fighting spam & viruses. Hopefully replacing hard-to-maintain, complex, resource hungry configurations used by small to large users today.
j-chkmail is a complete solution to mail filtering on busy SMTP gateways - it includes both behavioural filtering (rate limit, greylisting) and content filtering (statistical filtering, URL filtering, pattern matching, heuristics, ...).
Bors is a theoretical project that would use DNS blacklists like those used for spam but on a nfqueue level. It uses ideas from mblock/nfblockd but instead of a local list it uses DNS blacklists to lookup if an IP is blocked and what category it belongs.