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Postfix

Mail transfer agent

Postfix Description
Postfix is a free and open-source mail transfer agent (MTA) that routes and delivers electronic mail.
It is released under the IBM Public License 1.0 which is a free software license.
Originally written in 1997 by Wietse Venema at the IBM Thomas J. Watson Research Center and first released in December 1998, Postfix continues to be actively developed by its creator and other contributors. The software is also known by its former names VMailer and IBM Secure Mailer.
In March 2017 in a study performed by E-Soft, Inc., approximately 33% of the publicly reachable mail-servers on the Internet ran Postfix.
A list below shows Postfix alternatives which were either selected by us or voted for by users. You can filter this list by tags and platforms

Latest version of Postfix is 3.2.2 and it was released on 2017-06-10.

Postfix Alternatives

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  • Armitage by Leo Louvre

    Armitage is a graphical cyber attack management tool for the Metasploit Project that visualizes targets and recommends exploits. It is a free and open source network security tool notable for its...

    Latest version of Armitage is 1.48 and it was released on 2013-11-21.

    Tags: Computer Network Security, Computer Security Exploits, Computer Security Software, Crossplatform Free Software, Free Security Software, Injection Exploits, Software Testing, Unix Networkrelated Software
  • WWWOFFLE

    WWWOFFLE is a proxy server and web caching software, allowing dial-up or broadband users to cache data for offline use. It can handle url=HTTP,]],]], and finger protocol, and operates on IPv4 and...

    Latest version of WWWOFFLE is 2.9j and it was released on 2016-03-23.

    Tags: Free Proxy Servers, Unix Networkrelated Software
  • Lucida by Clarity Lab, University of Michigan

    Lucida is a natural language intelligent personal assistant (IPA) notable for being open source in a field of competing proprietary IPA services. Lucida was originally developed by Clarity Lab at...

    Tags: Virtual Assistants, Natural Language Processing Software, Free Software Projects, Linux Software Projects, Unix Networkrelated Software, 2015 Software
  • SquidGuard

    SquidGuard is a URL redirector software, which can be used for content control of websites users can access. It is written as a plug-in for Squid and uses blacklists to define sites for which access...

    Latest version of SquidGuard is 1.4 and it was released on 2009-01-03.

    Tags: Contentcontrol Software, Free Networkrelated Software, Linux Security Software, Unix Networkrelated Software, Unix Securityrelated Software
  • Privoxy by Privoxy Developers

    Privoxy is a free non-caching web proxy with filtering capabilities for enhancing privacy, manipulating cookies and modifying web page data and url=HTTP]headers before the page is rendered by the...

    Tags: Internet Privacy, Proxy Servers, Free Networkrelated Software, Free Software Programmed In C, Crossplatform Software, Forward Proxy, Reverse Proxy, Proxy Server Software For Linux, Unix Networkrelated Software
  • Pound by Apsis GmbH

    Pound is a lightweight open source reverse proxy program and application firewall suitable to be used as a web server load balancing solution. Developed by an IT security company, it has a strong...

    Latest version of Pound is 2.7 and it was released on 2015-01-26.

    Tags: Free Networkrelated Software, Unix Networkrelated Software, Reverse Proxy
  • lsh by Niels Möller

    lsh is a free software implementation of the Secure Shell (SSH) protocol version 2, by the GNU Project including both server and client programs. Featuring SRP as specified in secsh-srp besides,...

    Latest version of lsh is v2.1 and it was released on 2013-06-26.

    Tags: Gnu Project Software, Unix Networkrelated Software, Free Security Software, Free Networkrelated Software, Secure Shell
  • hping by Salvatore Sanfilippo (Antirez)

    hping is a free packet generator and analyzer for the TCP/IP protocol distributed by Salvatore Sanfilippo (also known as Antirez). it is a one type of a tester for network security. It is one of the...

    Latest version of hping is hping3-20051105 and it was released on November 5, 2005.

    Tags: Free Networkrelated Software, Unix Networkrelated Software, Network Analyzers
  • Varnish by Poul-Henning Kamp,Redpill-Linpro, Varnish Software

    Varnish is an url= accelerator. Varnish is focused exclusively on ] designed for content-heavy dynamic web sites as well as heavily consumed APIs. In contrast to other web accelerators, such as...

    Latest version of Varnish is 5.1.2 and it was released on 2017-04-07.

    Tags: Reverse Proxy, Free Proxy Servers, Proxy Server Software For Linux, Unix Networkrelated Software, Free Software Programmed In C, Free Web Server Software, Crossplatform Software, Forward Proxy
  • Apache Traffic Server by Apache Software Foundation

    The Apache Traffic Server (ATS) is a modular, high-performance reverse proxy and forward proxy server, generally comparable to Nginx and Squid. It was created by Inktomi, and distributed as a...

    Latest version of Apache Traffic Server is 7.1.1 and it was released on 2017-09-07.

    Tags: Apache Software Foundation, Free Proxy Servers, Proxy Server Software For Linux, Free Software Programmed In C, Free Web Server Software, Crossplatform Free Software, Forward Proxy, Reverse Proxy, Unix Networkrelated Software
  • ArpON ARP handler inspection

    ArpON (ARP handler inspection) is a computer software project to improve network security. It has attracted interest among network managers and academic researchers and is frequently cited as a...

    Latest version of ArpON - ARP handler inspection is 3.0-ng and it was released on 2016-01-29.

    Tags: Network Analyzers, Network Management, Computer Security Software, Computer Network Security, Unix Networkrelated Software, Unix Security Software, Free Security Software, Free Network Management Software, Free Networkrelated Software, Linux Security Software, Linux Networkrelated Software, Free Software Programmed In C, Software Using The Bsd License
  • thttpd

    thttpd (tiny/turbo/throttling HTTP server) is an open source software web server from ACME Laboratories, designed for simplicity, a small execution footprint and speed. thttpd is single-threaded and...

    Tags: Free Software Programmed In C, Free Web Server Software, Crossplatform Free Software, Unix Networkrelated Software
  • Nginx by Nginx, Inc.

    Nginx (stylized as NGINX, NGiИX or nginx) is a web server which can also be used as a reverse proxy, load balancer and HTTP cache. The software was created by Igor Sysoev and first publicly released...

    Tags: 2002 Software, Companies Established In 2011, Crossplatform Free Software, Forward Proxy, Free Proxy Servers, Free Software Programmed In C, Free Web Server Software, Proxy Server Software For Linux, Reverse Proxy, Software Companies Of Russia, Software Using The Bsd License, Unix Networkrelated Software, Web Server Software For Linux
  • Hiawatha Webserver by Hugo Leisink

    Hiawatha is a web server available for multiple platforms. It has been developed by Hugo Leisink since...

    Latest version of Hiawatha Webserver is 10.6 and it was released on 2017-04-16.

    Tags: Free Web Server Software, Free Software Programmed In C, Crossplatform Free Software, Unix Networkrelated Software, Reverse Proxy, Web Server Software For Linux
  • Apache HTTP Server by Apache Software Foundation

    Apache HTTP Server, colloquially called Apache , is url= Server copies run on url=d]url=d as the dominant ] cross-platform web server software, released under the terms of Apache License 2.0. Apache...

    Tags: 1995 Software, Apache Software Foundation, Apache Software Foundation Projects, Crossplatform Free Software, Free Software Programmed In C, Free Web Server Software, Reverse Proxy, Software Using The Apache License, Unix Networkrelated Software, Web Server Software For Linux
  • TCP Wrapper by Wietse Venema

    TCP Wrapper is a host-based networking ACL system, used to filter network access to Internet Protocol servers on (Unix-like) operating systems such as Linux or BSD. It allows host or subnetwork IP...

    Tags: Unix Networkrelated Software, Bsd Software, Free Security Software, Transmission Control Protocol, Internet Protocol Based Network Software
  • SSLExplorer Community Edition by 3SP Ltd

    SSL-Explorer: Community Edition was an open source SSL VPN product developed by 3SP Ltd, a company acquired by Barracuda Networks. It is licensed under the GNU General Public License (GPL), and is...

    Latest version of SSL-Explorer: Community Edition is 1.0.0 RC17 and it was released on March 18, 2008.

    Tags: Computer Network Security, Tunneling Protocols, Free Security Software, Unix Networkrelated Software
  • Snort by Cisco Systems

    Snort is a free and open source network intrusion prevention system (NIPS) and network intrusion detection system (NIDS) created by Martin Roesch in 1998. Snort is now developed by Sourcefire, of...

    Latest version of Snort is 2.9.9.0 and it was released on 2016-12-14.

    Tags: Free Security Software, Computer Security Software, Linux Security Software, Unix Networkrelated Software, Luascriptable Software, Intrusion Detection Systems
  • Grsync

    Grsync is a graphical user interface for rsync. rsync is a differential backup and file synchronization tool widely used in Unix-like operating systems. Grsync is developed with the GTK+ widget...

    Latest version of Grsync is 1.2.6 and it was released on 2016-03-15.

    Tags: Internet Protocol Based Network Software, Unix Networkrelated Software, Data Synchronization, Free Backup Software, Backup Software For Linux, Linux Archivers And Compressionrelated Utilities, Software That Uses Gtk
  • Metasploit by Rapid7 LLC

    The Metasploit Project is a computer security project that provides information about security vulnerabilities and aids in penetration testing and IDS signature development. Its best-known...

    Latest version of Metasploit is 4.14 and it was released on 2017-02-24.

    Tags: Antiforensic Software, Computer Network Security, Computer Security Exploits, Security Testing Tools, Cryptographic Attacks, Free And Opensource Software Organizations, Crossplatform Free Software, Free Security Software, Free Software Programmed In Ruby, Injection Exploits, Software Testing, Web Security Exploits, Windows Security Software, Macos Security Software, Unix Networkrelated Software
  • IPOP

    IPOP (IP-Over-P2P) is an open-source user-centric software virtual network allowing end users to define and create their own virtual private networks (VPNs). IPOP virtual networks provide end-to-end...

    Tags: Computer Network Security, Free Security Software, Tunneling Protocols, Unix Networkrelated Software, Virtual Private Networks
  • casync

    casync (content-addressable synchronisation) is a Linux software utility designed to distribute frequently-updated file system images over the...

    Tags: Linux Software, 2017 Software, Data Synchronization, Free Backup Software, Backup Software For Linux, Free Networkrelated Software, Network File Transfer Protocols, Unix Networkrelated Software, Free File Transfer Software
  • Slirp by Danny Gasparovski, Kelly Price (maintainer)

    Slirp (sometimes capitalized SLiRP) is a software program that emulates a PPP, SLIP, or CSLIP connection to the Internet via a shell account. It is largely obsolete for its original purpose, as...

    Latest version of Slirp is 1.0.17 and it was released on January 8, 2006.

    Tags: Free Networkrelated Software, Unix Networkrelated Software, 1995 Software
  • pppd

    PPPD is the Point-to-Point Protocol daemon which is used to manage network connections between two nodes on Unix-like operating systems. It is configured using command-line arguments and...

    Latest version of pppd is 2.4.7 and it was released on August 9, 2014.

    Tags: Free Networkrelated Software, Unix Networkrelated Software
  • netsniffng toolkit by Daniel Borkmann, Tobias Klauser, Herbert Haas, Emmanuel Roullit, Markus Amend and many others

    netsniff-ng is a free Linux network analyzer and networking toolkit originally written by Daniel Borkmann. Its gain of performance is reached by zero-copy mechanisms for network packets (RX_RING,...

    Latest version of netsniff-ng toolkit is 0.6.3 and it was released on 2017-04-11.

    Tags: Network Analyzers, Free Network Management Software, Unix Networkrelated Software, Free Software Programmed In C, Free Networkrelated Software, Computer Network Security, Linuxonly Software
  • rsync by Wayne Davison

    rsync is a utility for efficiently transferring and synchronizing files across computer systems, by checking the timestamp and size of files. It is commonly found on Unix-like systems and functions...

    Tags: 1996 Software, Data Synchronization, Free Backup Software, Backup Software For Linux, Free Networkrelated Software, Network File Transfer Protocols, Unix Networkrelated Software, Free File Transfer Software
  • stunnel by Michał Trojnara

    stunnel is an open-source multi-platform application used to provide universal TLS/SSL tunneling service. stunnel can be used to provide secure encrypted connections for clients or servers that do...

    Tags: Cryptographic Software, Free Security Software, Unix Networkrelated Software, Transport Layer Security Implementation
  • Virtuoso Universal Server by OpenLink Software

    Virtuoso Universal Server is a middleware and database engine hybrid that combines the functionality of a traditional Relational database management system (RDBMS), Object-relational database...

    Latest version of Virtuoso Universal Server is 7.2.4 and it was released on April 2016.

    Tags: Atom, Big Data Products, Clientserver Database Management Systems, Columnoriented Dbms Software For Linux, Crossplatform Free Software, Crossplatform Software, Database Engines, Distributed Computing Architecture, Documentoriented Databases, Enterprise Application Integration, Free Database Management Systems, Free File Sharing Software, Free Software Programmed In C, Free Web Server Software, Ftp Server Software, Messageoriented Middleware, Metadata, Middleware, Newsql, Nosql, Online Databases, Ordbms Software For Linux, Macos Databaserelated Software, Products Introduced In 1998, Relational Database Management Systems, Rss, Semantic Web, Sql Data Access, Structured Storage, Triplestores, Unix Internet Software, Unix Networkrelated Software, Web Services, Windows Databaserelated Software, Xml Software, Xslt Processors