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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.

  • Gen AI apps are built with MongoDB Atlas Icon
    Gen AI apps are built with MongoDB Atlas

    The database for AI-powered applications.

    MongoDB Atlas is the developer-friendly database used to build, scale, and run gen AI and LLM-powered apps—without needing a separate vector database. Atlas offers built-in vector search, global availability across 115+ regions, and flexible document modeling. Start building AI apps faster, all in one place.
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  • deskbird is the most intuitive desk booking app for your hybrid office. Icon
    deskbird is the most intuitive desk booking app for your hybrid office.

    With deskbird, creating an efficient workplace has never been easier.

    For companies in need of a people-centric workplace management solution so employees can see who is in the office, schedule their office and work-from-home days, and book resources for office days.
    Learn More
  • 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
    Leader badge">
    Downloads: 103,575 This Week
    Last Update:
    See Project
  • 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: 41,405 This Week
    Last Update:
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  • 3
    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: 12 This Week
    Last Update:
    See Project
  • 4
    BitCrazy's Faucet-in-a-Box Mod

    BitCrazy's Faucet-in-a-Box Mod

    Mod of the original Faucet-in-a-Box faucet PHP script

    Mod of the original Faucet-in-a-Box faucet PHP script (based on its revision 69). Includes pre-installed Anti-Bot Links 5.75, full support of user balances, countdown timer and some other improvements and cool features. ======================================== Minimum requirements: PHP 5.4.4+ (5.5 recommended) MySQL (5.6 recommended) ======================================== CHANGELOG { [F] - bugfixes, [+] - new features, [!] - known issues } Current release (version 7): [+]: CACert.pem updated to latest version. [+]: FaucetHub.php was replaced with native FaucetHub library! [+]: Faucet now has page "Currency rate", where you can see USD price of selected currency. [+]: Anti-Bot Links were updated to version 5.75 [F]: + various related fixes & small changes. [!]: Script has no support for FaucetHub's "last_status" code and "checkAddress()" fn (at least, now)
    Downloads: 3 This Week
    Last Update:
    See Project
  • Melis Platform is an enterprise-grade Low Code Platform simplifying app creation, management, and delivery. Icon
    Melis Platform is an enterprise-grade Low Code Platform simplifying app creation, management, and delivery.

    Ideal for websites, apps, e-commerce, CRMs, and more

    Melis is a new generation of Content Management System and eCommerce platform to achieve and manage websites from a single web interface easy to use while offering the best of open source technology.
    Learn More
  • 5
    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: 1 This Week
    Last Update:
    See Project
  • 6
    A Very Simple Captcha

    A Very Simple Captcha

    This Plugin provides very simple and powerful captcha for your blog

    This Plugin provides very simple and powerful captcha for your blog with wide variety of logical methods and models. By displaying different logical captcha with random manner may provide high level of security. Users can select wide variety of methods to display the captcha 1. Sorting in increasing or decreasing order 2. Entering biggest or smallest number 3. Selecting Am or Am Not Spammer using combo box 4. Entering the alphabets 5. Addition or Subtraction 6. Selecting Am Not Spammer using check box
    Downloads: 1 This Week
    Last Update:
    See Project
  • 7
    A Bash script for downloading and installing additional Clamav definition files.
    Downloads: 1 This Week
    Last Update:
    See Project
  • 8
    This class is intended to block the action of spam bots or robots (as Captcha), employing inteligent tactics on human detection. Made on PHP.
    Downloads: 0 This Week
    Last Update:
    See Project
  • 9

    CIDRAM

    CIDRAM: Classless Inter-Domain Routing Access Manager.

    CIDRAM (Classless Inter-Domain Routing Access Manager) is a PHP script designed to protect websites by blocking requests originating from IP addresses regarded as being sources of undesirable traffic, including (but not limited to) traffic from non-human access endpoints, cloud services, spambots, scrapers, etc. It does this by calculating the possible CIDRs of the IP addresses supplied from inbound requests and then attempting to match these possible CIDRs against its signature files (these signature files contain lists of CIDRs of IP addresses regarded as being sources of undesirable traffic); If matches are found, the requests are blocked.
    Downloads: 0 This Week
    Last Update:
    See Project
  • Power through agendas and documents, make more informed decisions and conduct board meetings faster. Icon
    Power through agendas and documents, make more informed decisions and conduct board meetings faster.

    For team managers searching for a solution to manage their meetings

    iBabs not only captures the entire decision-making process – it takes all the paperwork out of meetings. iBabs empowers everyone who has ever organized or attended, a meeting. With a seemingly simple app that offers complete control and a comprehensive overview of all those fiddly details. With about 3000 organizations and over 300,000 users, iBabs gives you peace of mind. So you can quickly organize effective meetings, and good decisions can be made with confidence. iBabs didn’t just happen overnight. We started analyzing and simplifying board meeting processes many years ago. We understand all the work that goes into meetings, and how to streamline everything so it all flows smoothly. On any device, confidentially, securely and automatically. Make good decisions with confidence.
    Learn More
  • 10
    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:
    See Project
  • 11
    Based on the free text to image service: http://img4me.com/ You can convert text formatted email address or message into image, and send a shorten URL to share with your friends, so the search engine could not catch these information in a easy way.
    Downloads: 0 This Week
    Last Update:
    See Project
  • 12
    LVC-Adblocker-Android

    LVC-Adblocker-Android

    An InApp and Browser Adblocker based on hosts file blacklists

    An InApp and Browser Adblocker based on hosts file blacklists
    Downloads: 0 This Week
    Last Update:
    See Project
  • 13
    LVC-Adblocker-Win

    LVC-Adblocker-Win

    Perhaps the smallest system-wide Adblocker ever!

    Perhaps the smallest system-wide Adblocker ever! A Clone of HostsManager from LVC! This program allows you to update your hosts file with a downloaded blacklist. The blacklisted traffic is being redirected to a blockpage (or a IP/localhost). Therefore tracking is being reduced to a minimum. You are also being protected from spam ads and more.
    Downloads: 0 This Week
    Last Update:
    See Project
  • 14
    MsTasty is a free, PHP-based and modular IRC bot
    Downloads: 0 This Week
    Last Update:
    See Project
  • 15
    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:
    See Project
  • 16

    Pecker Scanner

    A static source code analyser for vulnerabilities in PHP.

    A scanner named pecker, written in php,It can check dangerous functions with lexical analysis. to scans files for malicious PHP Code. Github : https://github.com/cfc4n/pecker
    Downloads: 0 This Week
    Last Update:
    See Project
  • 17
    Home of the Antispam for all fields mod ! Development board > http://www.phpbbantispam.com
    Downloads: 0 This Week
    Last Update:
    See Project
  • 18
    A Bash script for downloading and installing additional Clamav definition files.
    Downloads: 0 This Week
    Last Update:
    See Project
  • 19
    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:
    See Project
  • 20

    SafeAnon

    Prevent anonymous users from posting URLs in public notes.

    MantisBT Plugin to prevent anonymous users from posting URLs in public notes. Please see instructions and additional details on GitHub.
    Downloads: 0 This Week
    Last Update:
    See Project
  • 21
    SpamCheck is an email scanner, comprising anti-virus, spam scanning and a quarantine / management interface.
    Downloads: 0 This Week
    Last Update:
    See Project
  • 22
    SpamCheetah is an OpenBSD greylisting based spam filter. It is a liveCD that can run on any machine and it does not modify your hard disk or anything else. It is a network level spam filter and you have to run a separate mail server with it.
    Downloads: 0 This Week
    Last Update:
    See Project
  • 23

    SpamCop

    Report spam to SpamCop.

    Fork of the official SpamCop plugin for SquirrelMail, containing additional features and fixes.
    Downloads: 0 This Week
    Last Update:
    See Project
  • 24

    UnSpam Me

    Unsubscirbes from newsletters, mailing lists and so on.

    UnSpam Me v1.0.2 (c) 2018 by Dennis M. Heine This program searches your IMAP eMail inbox folder and unsubscribes from all mailing lists/news letters. It uses the List-Unsubscribe mail header to get unsubscription link. If it's an URL, it will be visited. If it's an eMail address, an unsubscription mail will be sent. To get the server details, please contact your mail provider. Examples: Google Mail: https://www.lifewire.com/what-are-the-gmail-smtp-settings-1170854 GMX: https://www.pop3-imap-smtp.de/gmx/ Web.de: https://hilfe.web.de/pop-imap/imap/imap-serverdaten.html Please note: some providers do block mass sending of mails. In that case, please run the program several times, deleting all mails you dont want to be processed each time.
    Downloads: 0 This Week
    Last Update:
    See Project
  • 25

    ipblock

    Block or allow connections by country address blocks

    Ipblock allows you to select which countries you allow or block connections to and from.
    Downloads: 0 This Week
    Last Update:
    See Project
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