DownloadThe 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 23131.
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.
Features
- Multiple Weighted DNSBLs
- Multiple Weighted URIBLs
- Greylisting
- Weighted Regular Expression Filtering
- Bayesian
- Penalty Box
- SenderBase
- SSL/TLS
- SPF/SRS
- Attachment Blocking
- ClamAV and FileScan
- Blocking Reporting
- LDAP support
- Backscatter Detection
- recipient replacement / GUI user access rights management
- MIME charset conversion / DKIM check and signing
- multi DB support for all hashes / level based open plugin support
- transparent TCP proxy support
- Plugins: archive, full attachment check and replacement, OCR
- damping (steal spammers time)
- AUTH to relay host / POP3 collector
- configuration value and file synchronization
- Block Reports design could be customized
- Razor2 and DCC support using Plugin
- SNMP support (monitoring, configuring, controll-API)
- user group import (file or LDAP or command based)
- automatic crash analyzer Hidden Markov Model
- IPv6 socket support
- word stemming (several languages) for Bayesian analyzer
- Perl module autoupdate via PPM or CPAN
- Hidden Markov Model spam detection engine
- full unicode support
- DMARC support
- privat Whitelist (legacy, domain based, user based)
- privat IP and Domain lists (legacy, domain based, user based)
- CPU affinity settings
- web file commander
- graphical statistic output (SVG)
- native SSL support for target hosts
- client SSL-certificate validation
- privat SMIME signing
- corporate SMIME signing, using a single privat certificate
- content based executable attachment blocking
- content based compressed attachment blocking
- BATV check and signing
- Message-ID signing and check FBMTV
- remote support
- Authenticated Received Chain (ARC) processing and signing
- RSS feeds for blocked emails using Plugin
- zero day virus detection
- VirusTotal API
Project Samples
License
GNU General Public License version 2.0 (GPLv2)Follow Anti-Spam SMTP Proxy Server
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User Reviews
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ASSP is a free and open-source SMTP delegate server that is expected to filter spam and other unwanted messages. It is suitable with Windows, Linux, and other Unix-like working systems. One of the main benefits of ASSP is how well it removes spam and other unwanted emails. The item uses a blend of different systems, including blacklists, whitelists, and simulated intelligence computations, to recognize and obstruct unfortunate messages. Users are free to configure the software in any way they see fit because ASSP can be customized to meet the needs of specific organizations as well as individual users. Another benefit of ASSP is its simplicity of use. The software has an intuitive web interface that simplifies configuration and administration. Because it is compatible with a wide range of email clients and servers, ASSP can also be incorporated into a variety of email systems. Additionally, ASSP is extremely adaptable. Users have the ability to configure the software to use a variety of spam filters, modify the scoring system used to identify spam and create individualized rules to deal with specific types of emails. However, it is essential to keep in mind that ASSP may require some technical expertise and knowledge for proper setup and configuration. Additionally, the software may require initial tuning, which can take some time, in order to perform at its best. As a whole, ASSP is an effective and highly customizable SMTP proxy server for removing spam and other unwanted emails. It is an excellent choice for businesses and individuals looking to improve their email security and reduce the number of unwanted messages they receive because of its ease of use and compatibility with a large number of email clients and servers. However, customers should be willing to put in some effort and time to properly set up and design the product.
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This is quite a decent anti-spam platform. It does however take some finesse in configuring it. The interface is clean and functional but can be a little confusing until you get used to using it. I have not experienced many crashes. And of coarse its open source and free and it works so theres three positives.
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Excellent results if configured correctly.
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Excellent product, you need time to handle it, but after some time you recognize that the gui is really functional and the product is designed to get you out of the spam trap. Dont give up because of the overhelming gui at the start.