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Post-Office Software

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

  • Enterprise-Grade Monitoring - Zero Compromises Icon
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    Comet Backup - Fast, Secure Backup Software for MSPs

    Fast, Secure Backup Software for Businesses and IT Providers

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  • 1
    The Courier mail transfer agent (MTA) is an integrated mail/groupware server based on open commodity protocols such as ESMTP, IMAP, POP3, LDAP, SSL, and HTTP. Courier provides ESMTP, IMAP, POP3, Webmail, calendaring, and mailing list services.
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    Downloads: 624 This Week
    Last Update:
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  • 2
    Fetchmail - the mail-retrieval daemon

    Fetchmail - the mail-retrieval daemon

    Client daemon to move mail from POP and IMAP to your local computer

    Fetchmail is a mail retrieval daemon that can download messages from POP3, IMAP, ODMR and ETRN-based stores, with SSL/TLS security including certificate verification, and pass downloaded mail to a local SMTP or LMTP server, or a message delivery agent such as maildrop.
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    Downloads: 491 This Week
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  • 3
    SwithMail
    Send SMTP email silently from command line (CLI), or a batch file using Exchange, Gmail, Hotmail, or Yahoo! Plus. Supports XML settings files, variables, or all settings explicitly from the command line. Now supporting Exit Codes for batch file use (will return "0" for successful delivery, or "1" for error delivering) - handle your batch file accordingly.
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    Downloads: 52 This Week
    Last Update:
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  • 4

    HERMES Mail

    The cult-favourite eMail client formerly known as Qualcomm Eudora

    eMail traffic is on the rise. With over 100 man-years of development time behind it and a clean, intuitive interface that makes handling messages a breeze, Hermes Messenger (formerly known as QUALCOMM Eudora) is more than a way to send and receive mail: it's a powerful management tool with features to increase your productivity and enhance your communications. It is the best eMail program for people who get lots of it. If you're not yet one of them, you soon will be. Take control of your eMail before it takes control of you! Hermes provides industrial-strength communication, free of ads and free of cost.
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    Downloads: 28 This Week
    Last Update:
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  • Create and run cloud-based virtual machines. Icon
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  • 5
    PopTray is a mail notifier written in Delphi for the Windows platform. It sits in your tray notification area and check mail from multiple accounts on a timer interval. Preview, Delete, Rules, Plug-ins and translated into more than 30 languages.
    Downloads: 20 This Week
    Last Update:
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  • 6
    YPOPs! is an application which emulates a POP3/SMTP mail server and provides free POP3 and SMTP access to Yahoo! Mail. It does not depend on Yahoo's POP3/SMTP mail server. You can use a mail client of your choice!
    Downloads: 10 This Week
    Last Update:
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  • 7
    Columba
    Columba is an email client written in Java, featuring a user-friendly graphical interface with wizards and internalionalization support. Its a powerful mail management tool with features to enhance your productivity and communication.
    Downloads: 16 This Week
    Last Update:
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  • 8
    OpenPop.NET

    OpenPop.NET

    Robust open source POP3 client and MIME parser written in C#

    .NET library written in C# with a full implementation of a POP3 client. Easy to use but yet powerful. Includes a robust MIME parser backed by several hundred test cases. The easiest way to install OpenPop.NET is via NuGet. In Visual Studio's Package Manager Console, simply enter the following command: Install-Package OpenPop.NET Our homepage (http://hpop.sourceforge.net/) includes examples, documentation and a general introduction for email. For more information, visit our project homepage. Code is hosted on GitHub (https://github.com/foens/hpop).
    Downloads: 7 This Week
    Last Update:
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  • 9

    Isync

    mailbox synchronizer

    A command line utility for synchronizing remote IMAP mailboxes and local maildir-style mailboxes. This is useful for working in disconnected (off-line) mode, such as on a laptop, but also for mirroring mailboxes between servers.
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    Downloads: 37 This Week
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  • The All-in-One Commerce Platform for Businesses - Shopify Icon
    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

    Shopify is a leading all-in-one commerce platform that enables businesses to start, build, and grow their online and physical stores. It offers tools to create customized websites, manage inventory, process payments, and sell across multiple channels including online, in-person, wholesale, and global markets. The platform includes integrated marketing tools, analytics, and customer engagement features to help merchants reach and retain customers. Shopify supports thousands of third-party apps and offers developer-friendly APIs for custom solutions. With world-class checkout technology, Shopify powers over 150 million high-intent shoppers worldwide. Its reliable, scalable infrastructure ensures fast performance and seamless operations at any business size.
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  • 10
    ZMail allows you to send email from anyone, to anyone. You can use ZMail to send fake or anonymous emails. Have fun!
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    Downloads: 20 This Week
    Last Update:
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  • 11
    FreePOPs is a webmail to pop3 conversion daemon. It is extensible to support other webmail using the scripting language LUA. See the homepage for supported webmails.
    Downloads: 7 This Week
    Last Update:
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  • 12
    IndiMail
    Highly scalable/configurable Messaging Platform allowing users in a domain to be distributed on multiple hosts, has multiple queues. Provides virtual domains/users in MySQL. Modern MSP class qmail replacement with ESMTP, POP3/IMAP, QMTP, QMQP support
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    Downloads: 6 This Week
    Last Update:
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  • 13
    hMailServer is a SMTP/POP3/IMAP server for Windows. Data is stored in MySQL/MSSQL database and is easily accessed using the COM library. Project info, trackers and downloads has moved to www.hmailserver.com.
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    Downloads: 16 This Week
    Last Update:
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  • 14
    New Maintainer wanted! I'm looking for a new maintainer for this project because I'm not able to attend it anymore. If you want to help please write to kuddel-fl. KShowmail is a POP3 mail checker for the KDE with these features: show number, size and more information about mails on pop3 servers in a list view, show the mail headers or complete mails, delete unwanted mail from server by configurable filters.
    Downloads: 9 This Week
    Last Update:
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  • 15
    Convert Webmail to POP3.Is also included a SMTP/POP3 tunneling system that allow send and receive email in a private network HTTP PROXY based. All connection are plugin based. Over 450 email server supported and tested, GMAIL POP3/SMTP over Proxy Network.
    Downloads: 3 This Week
    Last Update:
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  • 16
    Hastymail
    Hastymail is a fast, secure, rfc-compliant, cross-platform IMAP/SMTP client application written in PHP providing a clean web interface for sending and reading E-mail. This version of Hastymail is no longer being developed. We are now working on a new version, Hastymail 3, AKA, "Cypht". http://cypht.org
    Downloads: 4 This Week
    Last Update:
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  • 17
    Java SMTP/POP EMail Server
    Provide an Open Source Java Email Server that supports POP3/SMTP.
    Downloads: 6 This Week
    Last Update:
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  • 18
    jwSMTP, Send email programmatically (C++ code/lib). Linux, BSD, Windows etc. Attachments, Multiple recipients, Cc/Bcc recipients supported. MX lookup or send to an SMTP server direct. LOGIN and PLAIN authentication now supported. Html or plain text forma
    Downloads: 5 This Week
    Last Update:
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  • 19
    Set of pure useful Java utilities taking care of common tasks and avoiding re-write of code
    Downloads: 8 This Week
    Last Update:
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  • 20
    An advanced qmail distribution based on qmail-sql which has SMTP, SMTPS, POP3, POP3S, IMAP, IMAPS services, a content scanner, spoofing protections, SMTP AUTH support, SMTP-after-POP/IMAP, PHP5 API, SPF support and much more...
    Downloads: 4 This Week
    Last Update:
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  • 21
    Rumble Mail Server
    Rumble is a mail server suite for SMTP (ESMTPSA), HTTP, POP3 and IMAP4v1 with an extensive C/C++ and Lua API for scripting. It comes with support for SSL/TLS, SQLite and MySQL and has a web-based administration and webmail feature. Additional included modules feature greylisting, DNS blacklisting, SpamAssassin support and dynamic performance scaling as well as a multithreaded structure that allows for clustering of multiple servers for one or all domains, and with the ease of the Lua API, you can create your own new server mailing lists, CRM software, e-marketing and other extensions within minutes.
    Downloads: 3 This Week
    Last Update:
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  • 22
    hotwayd/hotsmtpd are POP3/SMTP-HTTPMail gateway daemons. The HTTPMail protocol is used by the mail servers Hotmail, Lycos, Spray and MSN. The hotway suite you can receive and send mail via these services using any POP3/SMTP compliant mail reader.
    Downloads: 7 This Week
    Last Update:
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  • 23
    liberopops is useful for users of Libero provider who cannot read email due to its change of policy. It acts as a POP3 server which interfaces itself to the webmail service still available.
    Downloads: 5 This Week
    Last Update:
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  • 24
    smm is a anti-spam, mail-shaper, delete-on-server software thought for users who have a slow dialup connection and are sick and tired of downloading 1MB a day of spam and Win32-worm-attached messages.
    Downloads: 5 This Week
    Last Update:
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  • 25
    gavamail is a POP3/IMAP server implemented in JAVA for reading your gmail e-mail with your favorite mail client. Currently only POP3 is implemented but I hope to implement IMAP too. Libraries provided by the g4j and libgmail projects are used.
    Downloads: 4 This Week
    Last Update:
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Guide to Open Source Post-Office Software

Open source post-office software is a type of program that enables users to manage their own mail delivery services. It can be used for both personal and business applications, and it can offer features such as allowing multiple users to collaborate on the same project or enabling customers to track their packages in real time. The primary benefit of open source post-office software is its cost savings since there are no licensing fees associated with the use of this type of program.

The open source nature of post-office software means it is accessible to anyone who has an internet connection and access to the necessary tools. This allows users to customize the software according to their needs, rather than having them purchase a pre-packaged product that may not entirely meet all their requirements. Additionally, any bugs or issues found in the program can be fixed by developers within the community because the code is accessible for everyone, meaning fixes can take place at a much faster rate than proprietary software updates.

The main disadvantage of using open source post-office software, however, lies in its lack of support from vendors compared to proprietary solutions. Although mistakes can be readily corrected by community members due to open access, more complex problems may require better expertise than what exists in volunteer networks. Furthermore, certain features that exist in proprietary products may be absent from open source options which might also limit usage depending on individual circumstances.

Features of Open Source Post-Office Software

  • Mail Delivery: Post-office software provides the ability to deliver mail quickly and reliably. It handles both incoming and outgoing mail, ensuring that messages arrive in a timely fashion. Messages can be sent through various protocols like SMTP and IMAP.
  • Message Filtering: Post-office software offers powerful message filtering capabilities. It can automatically detect spam, viruses, and other malicious content before they reach their destination. It also provides a range of options for blocking unwanted emails such as specifying certain domains or keywords.
  • Authentication & Access Control: Post-office software allows administrators to control who has access to particular mailboxes or features within their system. It also offers authentication measures such as password protection or multi-factor authentication for added security.
  • Search & Retrieval: Post-office software allows users to easily search for messages from specific senders, subjects, or date ranges with its intuitive search tools. This makes it easy to find important emails without having to manually scroll through your inboxes.
  • Backup & Archiving: Post-office software allows administrators to back up their data regularly in order to safeguard against data loss due to technical errors or malicious attacks. Additionally, it can archive messages so they do not take up space on an active server but are still accessible if needed in the future.

What Are the Different Types of Open Source Post-Office Software?

  • Web-based Email Clients: These open source post-office software solutions provide a graphical interface for email management. They can include features for sending and receiving emails, creating folders and organizing individual messages, attaching files to emails, connecting via POP3 or IMAP protocols to access existing email accounts, configuring spam filters, etc.
  • Command Line Mail Transfer Protocol Drivers: A command line mail transfer protocol driver is a type of program that provides server-side support for managing email. It’s typically used by system administrators to automate tasks such as sending and retrieving emails from external systems or setting up mailing lists.
  • Message Transfer Agents (MTAs): MTAs are server applications that help manage the delivery of emails between different servers. Their primary purpose is to ensure that an email is delivered quickly and reliably from one server to another. The most common type of MTA used in open source post-office software is sendmail.
  • Email Filtering Software: Many open source post-office programs offer the ability to filter incoming emails based on various criteria such as sender address, subject lines, content keywords, etc. This helps reduce the amount of junk mail received in user inboxes and can also be used to provide additional security against malicious threats or viruses contained within certain messages.
  • Server Management Applications: This type of software provides tools for configuring and managing email servers. Such applications may include modules for setting permissions on accounts/folders, monitoring system utilization statistics, adding new users/domains/aliases/accounts, backing up data files, testing outbound connections through SMTP AUTH encryption protocols , etc.

Open Source Post-Office Software Benefits

  1. Cost-Effective: Open source post-office software is free or very low cost and can be used to manage post office operations with no additional expenses.
  2. Flexible and Customizable: Open source post-office software can be easily tailored to the needs of each individual organization, making it much easier for users to make use of the features that best meet their specific requirements.
  3. Easy to Use: Because these solutions are open source, they are often easy to install and configure, making them ideal for organizations that don’t have extensive IT budgets.
  4. Scalable: This type of software provides scalability, allowing businesses to quickly add or remove users from a single instance so that their post-office operations can grow or shrink as needed.
  5. Secure: Open source post-office software generally utilizes secure encryption protocols and other safeguards so that customer data is safe from outside intruders.
  6. Automated Processes: These solutions can automate processes such as billing, order processing, tracking shipments, and more so that businesses can reduce manual labor costs while maintaining accuracy and efficiency.

Who Uses Open Source Post-Office Software?

  • Small-Business Owner: These are business owners who want to use open source mail server software to help manage their online correspondence, such as sending emails and managing contact lists.
  • Home User: These users need reliable software for personal use without the hassle of having to pay for a subscription. Open source post office software allows them to self-host their own email accounts and manage all of their correspondence in one place.
  • Corporate User: Corporate users often have a large volume of emails coming in daily, so having an open source back-end to handle this process is often beneficial. This type of user may also require additional security features that are not available with free or paid services.
  • Web Developer: Web developers will find open source post office software useful for quickly setting up websites that include a secure email system or contact forms. They can customize the codebase and modify it as needed in order to fit the needs of their clients or projects.
  • Security Analyst/Security Researcher: Security analysts and researchers prefer using open source post office software because it allows them to more easily audit the codebase themselves, ensuring they can provide better security recommendations when needed.
  • System Administrator/IT Professional: System administrators and IT professionals may use open source mail server software to create an infrastructure with more control over its operation than they could get from third-party providers or web hosts. This can be used by companies looking for full control over their servers, message routing, protocols, etc.

How Much Does Open Source Post-Office Software Cost?

Open source post-office software is free to use. The only costs would come from installing, customizing and maintaining the software. Depending on the size and complexity of your post-office operations, there may be additional costs for hardware, software licenses and IT professionals to install, maintain and extend the open source system. Some post office systems can be installed without the need of professional help if you have technical capabilities in house, while others require more technical expertise to set up properly. If professional services are required then those costs will vary depending on how much customization is needed. Additionally, if a support plan is desired then additional fees may be applicable depending on the level of service agreement purchased.

What Does Open Source Post-Office Software Integrate With?

Open source post-office software can integrate with many types of software. For instance, customer relationship management (CRM) software is designed to manage customer data and automate tasks such as lead generation, contact management and order processing. This type of software can facilitate communication between the post office staff and customers. Accounting software helps to track purchase orders, invoices and other expenses related to postal operations. Human resources (HR) systems can provide information about employee schedules, payrolls and time off requests. Additionally, document management systems are essential for storing postal documents securely in an organized fashion. Furthermore, digital asset management solutions help organize digital assets used by the team such as images, videos or logos for printing applications. Finally, task automation tools allow workflow processes to be automated efficiently so that tasks can be completed faster without any human intervention. All these types of software are capable of integrating with open source post-office software in order to improve operational efficiency, accuracy and customer satisfaction.

Recent Trends Related to Open Source Post-Office Software

  1. Increased Flexibility: Open source post-office software provides increased flexibility, allowing the user to customize the software to their specific needs. This makes it easier for businesses to tailor their systems to their particular requirements.
  2. Easier Collaboration: The open source post-office software allows users to collaborate on projects with other users, making working on projects together easier.
  3. Reduced Cost: Open source post-office software is often free or very low cost, compared to traditional office suites, which can be expensive. This allows businesses to save money on acquiring office suites and instead use the open source software.
  4. Improved Security: Open source software is often more secure than closed-source counterparts due to its transparent nature and ability to be audited by anyone. This makes it a better choice for businesses who want to ensure that their data is secure.
  5. Easier Maintenance: Open source post-office software is typically easier to maintain than traditional office suites due to its modular design and ability for users to customize it as needed. This makes it much easier for businesses to keep their systems up-to-date without needing expensive technical resources.
  6. Increased Community Support: Many open source post-office software projects have vibrant communities of users who are willing to help each other out when they run into issues or have questions about the software. This is a great resource for businesses who are just getting started with a new system, as they can get help from experienced users quickly and easily.

Getting Started With Open Source Post-Office Software

  1. Getting started with open source post-office software can seem daunting at first, but it's actually quite simple and straightforward. First, you need to locate the right version of the post-office software that is compatible with your operating system and computer setup. You should also consider what features you will need and make sure they are available in the version you choose. Once you have selected a compatible version, you can download it from its official website or any reliable third-party sources.
  2. Once the software is installed on your computer, it’s time to get familiarized with how everything works. You should read through the instructions provided as part of installation so that you understand all of the basic features and functions. Additionally, there are usually tutorials or training materials available online that can help give insight into how to use all of the tools within the software package most efficiently.
  3. You might also want to take some time to explore any additional features offered by your post-office software. Some of these may include more advanced options such as automated email sending, bulk mailing capabilities, custom message templates, data integration etc., depending on what product you opt for in particular. It's important to investigate all possible options so that you know exactly what capabilities are available before making a decision.
  4. Once everything is set up and configured according to your needs and preferences, it’s time to start using your new open source post-office software. Depending on which specific application you selected, some basic tasks could include composing messages (including attachments if needed), organizing contacts lists for easy mail delivery management and analyzing various metrics for tracking purposes (such as deliverability rate). With a little practice and patience soon enough you'll be an expert at managing your open source post office system.