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

  • MongoDB Atlas runs apps anywhere Icon
    MongoDB Atlas runs apps anywhere

    Deploy in 115+ regions with the modern database for every enterprise.

    MongoDB Atlas gives you the freedom to build and run modern applications anywhere—across AWS, Azure, and Google Cloud. With global availability in over 115 regions, Atlas lets you deploy close to your users, meet compliance needs, and scale with confidence across any geography.
    Start Free
  • Simple, Secure Domain Registration Icon
    Simple, Secure Domain Registration

    Get your domain at wholesale price. Cloudflare offers simple, secure registration with no markups, plus free DNS, CDN, and SSL integration.

    Register or renew your domain and pay only what we pay. No markups, hidden fees, or surprise add-ons. Choose from over 400 TLDs (.com, .ai, .dev). Every domain is integrated with Cloudflare's industry-leading DNS, CDN, and free SSL to make your site faster and more secure. Simple, secure, at-cost domain registration.
    Sign up for free
  • 1
    Windows MBox Viewer

    Windows MBox Viewer

    Windows eml and mbox viewer.

    Free Windows Mbox Viewer. Gain access to mbox archives or single eml messages. View attachments and export single mails in eml format. Access large mbox files such as Google Takeout or Mozilla Thunderbird Archives. Development of mbox viewer continues now at github: https://github.com/eneam/mboxviewer **NOTE**: Windows Defender may sometimes report incorrectly that mbox-viewer contains malware. Please report the case to the development. Development will ask Windows Security to update Windows Defender rules to resolve the issue. Last time the incorrect detection was corrected by Microsoft Security within few hours. User will need to run Windows Update to install the latest updated detection rules.
    Leader badge
    Downloads: 1,421 This Week
    Last Update:
    See Project
  • 2
    SquirrelMail
    SquirrelMail is a PHP-based Web email client. It includes built-in pure PHP support for IMAP and SMTP, and renders all pages in pure HTML 4.0 for maximum compatibility across browsers. It has strong MIME support and a flexible plugin system.
    Leader badge
    Downloads: 392 This Week
    Last Update:
    See Project
  • 3
    phpList

    phpList

    Powerful Open Source Email Marketing app with analytics & segmentation

    phpList delivers Open Source email marketing, including analytics, list segmentation, content personalisaton and bounce processing. Extensive technical features and a secure and stable codebase are the result of over 17 years of continuous development. Used in 95 countries, available in 20+ languages, and used to send 25 billion email campaigns last year. Deploy it with your own SMTP server, or get a free hosted account at http://phplist.com.
    Leader badge
    Downloads: 248 This Week
    Last Update:
    See Project
  • 4
    Untangle
    Untangle is a Linux-based network gateway with pluggable modules for network applications like spam blocking, web filtering, anti-virus, anti-spyware, intrusion prevention, bandwidth control, captive portal, VPN, firewall, and more. Visit http://untangle.com
    Downloads: 24 This Week
    Last Update:
    See Project
  • Our Free Plans just got better! | Auth0 Icon
    Our Free Plans just got better! | Auth0

    With up to 25k MAUs and unlimited Okta connections, our Free Plan lets you focus on what you do best—building great apps.

    You asked, we delivered! Auth0 is excited to expand our Free and Paid plans to include more options so you can focus on building, deploying, and scaling applications without having to worry about your security. Auth0 now, thank yourself later.
    Try free now
  • 5
    base64 RFC1113 Vanilla ANSI-C Code for a portable stand-alone file encode/decode utility. In 2001, I asked people to 'Help me break it!' Since then, 10+years later, the code remains unbroken and is in wide production use world-wide. It has been ported to all major architectures and been used as a template for ports to different computer and human languages. This is very mature and stable code. Although this comes from a project that was constrained by export controls and is used in secure systems, it is not security code per-se. I have therefore altered the 'Export Controls' category.
    Downloads: 26 This Week
    Last Update:
    See Project
  • 6
    vtenext - Holistic CRM (CRM + BPM + AI)
    vtenext, holistic CRM is not for you if you are looking for: - a classic CRM separated by departments, a copy of the closed source CRM but open source - a solution that permit to you to avoid to pay any kind of support for the CRM of your company - a second choice CRM, cause you have not enough budget for the closed source. So please, save time and save energy. Don’t DOWLOAD VTE If you are looking for: - a new age of CRM applications - a solution that has the right balance between performance and user licenses - an holistic application that manage all the customer processes, including the internal customers Please go on and have fun. For any support feel free to contact us and to have more information regarding the installation procedure visit: http://usermanual.vtenext.com/books/installation-requirements/page/installation-requirements-vtenext-1812
    Downloads: 13 This Week
    Last Update:
    See Project
  • 7
    MH-E is the Emacs interface to the MH mail system. It offers all the functionality of MH, the visual orientation and simplicity of use of a GUI, and full integration with Emacs, including thorough configuration and online help. Since MH-E 8.6 was released in 2016, its development migrated to the Emacs repository. Thus, if you install an Emacs package, or check out and compile the Emacs source, then you will be running the latest version of MH-E. Consequently, we will retire this site once all of the tickets are resolved. Therefore, please help us out and submit new tickets with M-x report-emacs-bug. MH-E is now only supported in the version of GNU Emacs in which it appears. It is no longer supported in XEmacs. It is compatible with MH versions 6.8.4 and higher, all versions of nmh, and GNU mailutils 1.0 and higher.
    Leader badge
    Downloads: 5 This Week
    Last Update:
    See Project
  • 8
    Collection of utilities specifically designed for use with Firebird RDBMS.
    Downloads: 6 This Week
    Last Update:
    See Project
  • 9
    smtptrapd is a multi-threaded daemon written in C that provides a RFC 2821 compliant SMTP service that always returns a 4xx soft error to the RCPT TO verb. It can be deployed as a secondary MX to reduce the amount of inbound spam.
    Downloads: 4 This Week
    Last Update:
    See Project
  • Keep company data safe with Chrome Enterprise Icon
    Keep company data safe with Chrome Enterprise

    Protect your business with AI policies and data loss prevention in the browser

    Make AI work your way with Chrome Enterprise. Block unapproved sites and set custom data controls that align with your company's policies.
    Download Chrome
  • 10
    Signify is a small program that allows a random signature to be generated from a set of rules. Each "section" can be one of an unlimited number of possibilities and be placed next to each other vertically to create columns.
    Downloads: 2 This Week
    Last Update:
    See Project
  • 11
    Set of pure useful Java utilities taking care of common tasks and avoiding re-write of code
    Downloads: 2 This Week
    Last Update:
    See Project
  • 12
    A privacy and security aware mailing list manager, perfect for allowing closed groups to interact on the Internet without interference from outsiders and former insiders.
    Downloads: 2 This Week
    Last Update:
    See Project
  • 13
    Gmail Notifier

    Gmail Notifier

    Multiple account (or label) Gmail notifier (without storing passwords)

    Gmail Notifier (restartless) is an open-source project that notify you about incoming emails from all your Google Mail accounts and labels. Features: 1. No requirement to enter your credentials. 2. Multiple account support 3. Multiple label support 4. Low bandwidth usage by using RSS technology 5. Mark as read, report span, trash or archive massages right from toolbar
    Downloads: 1 This Week
    Last Update:
    See Project
  • 14
    We provide a Hebrew version of Mozilla Firefox, Mozilla Thunderbird, SeaMonkey and Mozilla Application Suite. SeaMonkey/Mozilla Suite are also available for download from here, while the latest Firefox & Thunderbird are available only from mozilla.com.
    Downloads: 1 This Week
    Last Update:
    See Project
  • 15
    This is the advanced upload and email script. Features include 1) File upload 2) Upload via Url 3) Email files 4) Email Files as attachments 5) Zip and email files 6) Split Files 7) Join Files 8) Compare files using md5 9) Edit Email
    Downloads: 0 This Week
    Last Update:
    See Project
  • 16

    CRM114 MILTER

    CRM114 milter for sendmail

    This is a milter which scans emails with CRM114
    Downloads: 0 This Week
    Last Update:
    See Project
  • 17
    CookMail is a powerful HTML email form CGI handler. It provides custom HTML output and email messages without the hassle of programming.
    Downloads: 0 This Week
    Last Update:
    See Project
  • 18
    Enigmail

    Enigmail

    OpenPGP addon for Mozilla Thunderbird

    Addon for Mozilla Thunderbird and SeaMonkey providing OpenPGP-based encryption and authentication. Enigmail requires GnuPG.
    Downloads: 0 This Week
    Last Update:
    See Project
  • 19
    Access Yahoo Mail from your email client (Outlook, Thunderbird, etc.). The IMAP ID proxy adds an "IMAP ID command" needed to get Yahoo to provide IMAP access.
    Downloads: 0 This Week
    Last Update:
    See Project
  • 20
    JFormMail is a generic HTML form to e-mail gateway that parses the results of any form and sends them to the specified users. This servlet has many formatting and operational options, most of which can be specified within each form, meaning you don't nee
    Downloads: 0 This Week
    Last Update:
    See Project
  • 21
    JMultiSend

    JMultiSend

    A simple and fast cross-platform solution to send mass emails.

    JMultiSend is a simple and fast solution to send mass emails (Bulk E-mail); it only needs to load the list of addresses, the message (HTML or TXT), the data and then send. It is possible also to manage mailing lists subscribtions simply by emails, to send personalized messages with username and to schedule delays up to 24h (86400 secs); all this also from command-line. Since it is developed in Java it is a cross-platform application and does not need installation but needs only the Java Virtual Machine (version 6 or higher) that, in the case, is very easy to download and install.
    Downloads: 0 This Week
    Last Update:
    See Project
  • 22
    MIST for TntConnect

    MIST for TntConnect

    Easily import email into TntConnect

    Quickly and easily imports email into TntConnect history from IMAP and Gmail accounts. Runs natively on Windows, macOS and Linux - no CrossOver required! Works with all TntConnect 3.1+ and 4.x databases.
    Downloads: 0 This Week
    Last Update:
    See Project
  • 23
    MailForm is a generic backend for CGI scripts, which takes form input and delivers the results via e-mail.
    Downloads: 0 This Week
    Last Update:
    See Project
  • 24
    NaSMail

    NaSMail

    NaSMail is a standards-based webmail package written in PHP

    NaSMail is a standards-based webmail package written in PHP. It includes built-in pure PHP support for the IMAP and SMTP protocols, and all pages render in HTML 4.01 with minimal JavaScript and CSS. It has very few requirements and is very easy to configure and install. NaSMail has all the functionality you would want from an email client, including strong MIME support, address books, and folder manipulation. NaSMail is based on SquirrelMail 1.4.x.
    Downloads: 0 This Week
    Last Update:
    See Project
  • 25
    a public email form writen in php with template design ... file transfers, session support, XHTML compient with default templates, selectable to addresses AND hidden true email addresses, MX record checking for false email addresses
    Downloads: 0 This Week
    Last Update:
    See Project
  • Previous
  • You're on page 1
  • 2
  • Next