Browse free open source Anti-Spam software and projects below. Use the toggles on the left to filter open source Anti-Spam software by OS, license, language, programming language, and project status.

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  • 1
    Scrollout F1

    Scrollout F1

    An easy-to-use anti-spam email gateway

    • Designed for Linux and Windows email system administrators, Scrollout F1 is an easy to use, already adjusted email firewall (gateway) offering free anti-spam and anti-virus protection aiming to secure existing email servers, old or new, such as Microsoft Exchange, Lotus Domino, Postfix, Exim, Sendmail, Qmail and others. • Built-in multilayer security levels make configuration effort equal to a car radio. • It combines simplicity with effective protection using powerful open source with additional set of rules & filters. • Available as 64bit: - ISO image (Internet connection required during installation) - install from scratch (Internet connection required during installation). • Minimum Requirements (for 5,000 messages/day): 1 GB of RAM 30 GB storage drive 1 Processor x86/AMD64 1 Ethernet x 1 IPv4 address UDP ports: 53 123 4500 6277 24441 TCP ports: 25 80 443 2703
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    Downloads: 110,542 This Week
    Last Update:
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  • 2
    Anti-Spam SMTP Proxy Server

    Anti-Spam SMTP Proxy Server

    Anti-Spam SMTP Proxy Server implements multiple spam filters

    The Anti-Spam SMTP Proxy (ASSP) Server project aims to create an open source platform-independent SMTP Proxy server which implements auto-whitelists, self learning Hidden-Markov-Model and/or Bayesian, Greylisting, DNSBL, DNSWL, URIBL, SPF, SRS, Backscatter, Virus scanning, attachment blocking, Senderbase and multiple other filter methods. Click 'Files' to download the professional version 2.8.1 build 24261. A linux(ubuntu 20.04 LTS) and a freeBSD 12.2 based ready to run OVA of ASSP V2 are also available for download. NOTICE: V1 development has been stopped at the end of 2014 (1.10.1 build 16060). Possibly there will be done some bugfixing in future. Please upgrade to V2, which is and will be actively maintained.
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    Downloads: 44,177 This Week
    Last Update:
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  • 3
    Open source DKIM library, MTA filter implementation and associated tools.
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    Downloads: 102 This Week
    Last Update:
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  • 4
    MailCleaner

    MailCleaner

    Anti Spam SMTP Gateway

    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 comes in the form of virtual machine templates.. - fully compatible with any SMTP mail server (Exchange, Zimbra, O365,...)
    Downloads: 6 This Week
    Last Update:
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    The All-in-One Commerce Platform for Businesses - Shopify

    Shopify offers plans for anyone that wants to sell products online and build an ecommerce store, small to mid-sized businesses as well as enterprise

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  • 5
    Mailfilter

    Mailfilter

    Remote anti spam utility

    Mailfilter is a flexible utility for UNIX (-like) operating systems to get rid of unwanted spam mails, before having to go through the trouble of downloading them into the local computer. It offers support for one or many POP accounts.
    Downloads: 5 This Week
    Last Update:
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  • 6
    MsTasty is a free, PHP-based and modular IRC bot
    Downloads: 1 This Week
    Last Update:
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  • 7
    Copfilter
    Copfilter is a easy to install addon for the opensource firewall IPCop. It filters POP3, SMTP, HTTP, and FTP traffic for viruses and spam using various open source programs.
    Downloads: 0 This Week
    Last Update:
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  • 8
    DNSBL6d is a new RBL server that will be lightweight with IPv6 capiblities, MYSQL intergration, and other features. Your suggestions are welcomed.
    Downloads: 0 This Week
    Last Update:
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  • 9
    FilterBadRecruiters

    FilterBadRecruiters

    Google Apps Script to send third party recruiter email to spam

    FilterBadRecruiters is a Google Apps Script that processes new messages looking for unwanted email from known third party recruiters. When a match is found, a reply is sent informing the sender that the message is being reported as spam and will not be read. The script then logs matches to a spreadsheet and updates a pie chart displaying what percentage of these type of messages were sent from each domain.
    Downloads: 0 This Week
    Last Update:
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  • 10
    An IIS SMTP event sink manager which helps control e-mail flow and fight spam
    Downloads: 0 This Week
    Last Update:
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  • 11
    An open, all-in-one SMTP gateway, scanning your email traffic in order to prevent spam and viruses, using several anti-spam technologies. Based on Ubuntu Server.
    Downloads: 0 This Week
    Last Update:
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  • 12
    OpenSIQServer is the first OpenSource email sender reputation system, the efficiency is comparable with commercial software (more of 85% of spam email identified, less of 0.0001 false positive).
    Downloads: 0 This Week
    Last Update:
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  • 13
    RadicalSpam

    RadicalSpam

    Open Source Anti-Spam and Anti-Virus Gateway

    RadicalSpam is a free and open source package distributed under GPL v2, including products such as Postfix, SpamAssassin Amavisd-new, Clamav, Razor, DCC, Postgrey, Bind; providing a secure SMTP relay, ready to use with linux and docker environement. More information : http://www.radical-spam.org
    Downloads: 0 This Week
    Last Update:
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  • 14
    RadicalSpam Virtual Appliance

    RadicalSpam Virtual Appliance

    Virtual Appliance of RadicalSpam

    RadicalSpam Virtual Appliance takes full solution of RadicalSpam Community Edition , pre-installed in a OVF virtual machine ( Open Virtual Format ) compatible with the best virtualization platforms on the market , including VMware ESX Server. More information : http://www.radical-spam.org
    Downloads: 0 This Week
    Last Update:
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  • 15
    SSL Signature Check (SSLSigcheck) is an email filter designed to be run from within procmail. It will examine the signature and certificate of a signed email, and add header information that procmail recipes can use to filter the message.
    Downloads: 0 This Week
    Last Update:
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  • 16
    SpamCheck is an email scanner, comprising anti-virus, spam scanning and a quarantine / management interface.
    Downloads: 0 This Week
    Last Update:
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  • 17
    Spamtools is a java package designed to propose a unified and expendable library for the implementation of experimental spam filters.
    Downloads: 0 This Week
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  • 18
    The system is designed to upload phishing emails to a database where they are automatically analyzed and customized reports can be generated. UnMask was developed by ECIT Labs, Dept of Computer Science, FSU. The director of the Lab is Dr. Sudhir Aggarwal. UnMask has substantial on-line help features and should mainly be self-explanatory.
    Downloads: 0 This Week
    Last Update:
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  • 19
    This tool provides the same interface as a SiteErrorLog but provides the ability to specify who should receive error emails, what error emails are sent, and extra information to put in the headers of the error emails to provide easier mail filtering.
    Downloads: 0 This Week
    Last Update:
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  • 20
    mOTP

    mOTP

    mOTP is an Open Source alternative to SMS based One Time Passwords

    mOTP is an Open Source project building alternives to SMS Based one time passwords.
    Downloads: 0 This Week
    Last Update:
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