Browse free open source Email software and projects below. Use the toggles on the left to filter open source Email software by OS, license, language, programming language, and project status.
An easy-to-use anti-spam email gateway
Anti-Spam SMTP Proxy Server implements multiple spam filters
Windows eml and mbox viewer.
The classic email sending library for PHP
Protects you from spam mails and virus mails effectively with milter
SMTP email proxy and relay server
Sync Outlook with Google, SOGo or any other CalDAV / CardDAV server
Unified Communications Server
Web and API based SMTP testing
Sync Outlook contacts and calendars with Google
A faster, leaner email client and fork of Nylas Mail
E-mails, subdomains and names
Powerful Open Source Email Marketing app with analytics & segmentation
Fast Bayesian spam filter along lines suggested by Paul Graham
Phishing Campaign Toolkit
An automated e-mail OSINT tool
Open source email software is software that has been made freely available for the public to use and modify, often at no cost. Open source email programs include those created with open source programming languages such as Linux, Apache, and MySQL. The most common type of open source email software is webmail, which provides a graphical user interface for users to send and receive internet mail. Other types of open source email programs include desktop clients like Outlook Express, Eudora, or Thunderbird and server-based systems like Postfix or Courier IMAP. These systems provide more flexibility in terms of features and customization than webmail but require significant technical know-how and are typically used by large organizations.
One of the advantages of using open source email programs is that they support more protocols than proprietary counterparts; this allows users to access their emails across different devices, networks and applications. Additionally, since open source code is publically available it can be studied in detail by developers who can then suggest improvements or create additional features based on their findings. For these reasons many businesses prefer to host their own mail servers rather than rely upon third party services — a task that often requires an open source mail program as a platform for implementation.
Despite being free to use there are some downsides associated with using open source email programs; since the codes aren't typically audited outside of its community there's the potential for security vulnerabilities to exist due to lack of thorough testing prior to releasing an update. Furthermore user support may be limited depending on the size of its user base meaning it could take longer to get any help if encountered with an issue while setting up or configuring your system — something you might expect from paid services not found here.
Open source email software typically does not cost anything. Such programs are generally available for download at no charge, with the source code being open to the public. This means that anyone can take the code, modify it as they see fit, and share it with others. Open source software provides a great opportunity for businesses to save money when selecting an email solution because there is no initial purchase price nor any licensing fees for using them. Additionally, since open source software often has more active development and comes with a larger user community than most commercial offerings, users may find that open source solutions tend to be more reliable and feature-rich in comparison. With this being said, some top-tier features of commercial email platforms may not be available from open source counterparts; however, these types of advanced features usually carry an additional cost regardless of which platform you are using.
Open source email software can integrate with a variety of different types of software. For example, calendar and contact management tools, cloud storage services such as Dropbox or Google Drive, document writing and editing programs like Microsoft Office or OpenOffice, as well as website builders like WordPress can all integrate with open source email software. Additionally, task tracking and project management solutions such as Asana and Trello are often compatible with open source emails. These third-party programs can be used to further enhance the capabilities of the open source email system.
Getting started with using open source email software is a great way to gain access to powerful and cost-effective email services. Open source tools are used by many people around the world, and are often preferred due to the flexibility they offer in terms of customization options.
The first step to getting started with open source email software is to find an alternativemail client that will suit your needs. Popular open source clients include Thunderbird, Evolution, Clover Mail, and Horde Groupware Webmail Edition. It's important to do some research into each one before you decide which one you'd like to use - this will allow you to determine which features best fit your needs.
Once you've chosen an open source client, you'll need to setup an account by creating a username and password as well as setting up any other required settings such as server information. After configuring all of the necessary settings for your mail client, it's important that you test it out with sending a few emails back and forth between yourself so that you can ensure that everything is working correctly.
After setting up your initial account configuration, it's important that you take some time familiarizing yourself with the user interface if the particular software includes one - this can help make sure that all of its features are properly utilized when sending emails or managing contacts lists. Additionally, users should check if there are any resources available from either the provider or other third-party sources; these could be helpful in understanding additional features or troubleshooting specific problems with their mail client.
Finally, keeping your mail client secure should be given priority; users should enable two-factor authentication at least for their accounts so as not to risk their personal data being hacked or compromised easily. Regularly checking for updates for the particular software along with making regular backups of any data (such as contact lists) stored on it will also help keep safe from unwanted intrusion attempts from malicious actors online. With some basic knowledge of open source email clients and proper maintenance steps taken regularly, users can safely utilize these powerful tools without worrying about security issues caused by lack of carelessness in regards to online safety procedures.