Open Source Mac Email Servers
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Email Servers for Mac
View 10 business solutionsBrowse free open source Email Servers and projects for Mac below. Use the toggles on the left to filter open source Email Servers by OS, license, language, programming language, and project status.
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PHPMailer
The classic email sending library for PHP
PHPMailer – A full-featured email creation and transfer class for PHP. Support for UTF-8 content and 8bit, base64, binary, and quoted-printable encodings. SMTP authentication with LOGIN, PLAIN, CRAM-MD5, and XOAUTH2 mechanisms over SMTPS and SMTP+STARTTLS transports. Validates email addresses automatically. Many PHP developers need to send email from their code. The only PHP function that supports this directly is mail(). However, it does not provide any assistance for making use of popular features such as encryption, authentication, HTML messages, and attachments. Formatting email correctly is surprisingly difficult. There are myriad overlapping (and conflicting) standards, requiring tight adherence to horribly complicated formatting and encoding rules – the vast majority of code that you'll find online that uses the mail() function directly is just plain wrong, if not unsafe! -
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MailHog
Web and API based SMTP testing
Inspired by MailCatcher, easier to install. Built with Go, MailHog runs without installation on multiple platforms. Run it from Docker Hub or using the provided Dockerfile. The SMTP server starts on port 1025, the HTTP server starts on port 8025, in-memory message storage. ESMTP server implementing RFC5321. Support for SMTP AUTH (RFC4954) and PIPELINING (RFC2920). Web interface to view messages (plain text, HTML or source). Supports RFC2047 encoded headers. Real-time updates using EventSource. Release messages to real SMTP servers. Chaos Monkey for failure testing. HTTP API to list, retrieve and delete messages. See APIv1 and APIv2 documentation for more information. HTTP basic authentication for MailHog UI and API. Multipart MIME support. Download individual MIME parts. In-memory message storage. MongoDB and file based storage for message persistence. Lightweight and portable. No installation required. -
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smtp4dev
The fake smtp email server for development and testing
smtp4dev - the fake SMTP email server for development and testing. A dummy SMTP server for Windows, Linux, Mac OS-X (and maybe elsewhere where .NET Core is available). Lets you test your application without spamming your real customers. -
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PostfixAdmin is a Web Based Management tool created for Postfix. It is a PHP based application that handles Postfix Style Virtual Domains and Users that are stored in MySQL, PostgreSQL or SQLite
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Mail-in-a-Box
Take back control of your email with this mail server in a box
Mail-in-a-Box helps individuals take back control of their email by defining a one-click, easy-to-deploy SMTP+everything else server, a mail server in a box. Mail-in-a-Box lets you become your own mail service provider in a few easy steps. It’s sort of like making your own gmail, but one you control from top to bottom. Technically, Mail-in-a-Box turns a fresh cloud computer into a working mail server. But you don’t need to be a technology expert to set it up. Our goals are to make deploying a good mail server easy, promote decentralization, innovation, and privacy on the web, have automated, auditable, and idempotent configuration, not make a totally unhackable, NSA-proof server, and not make something customizable by power users. Mail-in-a-Box turns a fresh Ubuntu 18.04 LTS 64-bit machine into a working mail server by installing and configuring various components. It is a one-click email appliance. There are no user-configurable setup options. It "just works." -
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Zentyal, Linux Small Business Server
Zentyal is a Linux Small Business Server
Zentyal Server is an easy to use and affordable Linux server, specially designed to meet the needs of small and medium businesses Thanks to Zentyal's Samba integration, Zentyal provides native compatibility with Microsoft Active Directory, allowing you to join Microsoft clients to a domain and manage them easily. Zentyal Server incorporates all the network services required in a small and medium business environment: * Directory & Domain Server with native compatibility with Microsoft Active Directory * Mail Server with ActiveSync and webmail * Gateway with firewall and proxy * Infrastructure Server with DNS/DHCP server, Certification Authority and Virtual Private Networks For more information and download, please access the project's home page. -
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Inbucket
Disposable webmail server (similar to Mailinator) with built in SMTP
Inbucket is an email testing application; it will accept messages from any email address and make them available to view via a web interface. When you need to test your webapp's outbound emails with Mailinator but are stuck behind a firewall, Inbucket provides the solution. It allows you to keep your new application development secret until it's time to release it. Inbucket is ideal for validating that emails go out as part of your integration test suite, sending links to coworkers to demonstrate an email without sharing your Gmail password, and load testing your application without overwhelming your corporate Exchange server. You can use production data in your test environment without the risk of test messages leaking to an end user, and preview emails in multiple desktop email clients. Use Inbucket for all these needs and more. -
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Postal
A fully featured open source mail delivery platform for incoming
Postal is a complete, open-source mail delivery platform for managing massively scalable outgoing email infrastructure—designed as a self-hosted alternative to SendGrid, Mailgun, or Postmark. It provides a web UI for managing email streams, logs, and delivery infrastructure. Postal is highly scalable and intended for developers and businesses needing reliable email dispatch. -
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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!
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PostfixAdmin
Web based virtual user administration interface for Postfix mail
PostfixAdmin is a web-based interface for managing mail domains, mailboxes, and aliases for Postfix mail servers. It allows administrators to add and configure virtual domains and email users easily, supporting MySQL, PostgreSQL, and SQLite as backend databases. It's widely used in self-hosted email setups for simplifying email management. -
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mailcow
mailcow: dockerized
With the Nightly Branch, it is now possible to use an external Identity Provider as an additional authentication source. mailcow utilizes the OIDC (OpenID Connect) protocol to authenticate only mailbox users. You can also get a SAL which is a one-time payment with no liabilities or returning fees. mailcow makes use of various open-source software. Please assure you agree with their license before using mailcow. Any part of mailcow itself is released under GNU General Public License, Version 3. -
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DKIMproxy is an SMTP-proxy that implements the DKIM and DomainKeys standards, to sign and verify email messages using digital signatures and DNS records. It can be used to add DKIM support to nearly any existing SMTP mail server.
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HyperPool is a 100% pure Java project for network services management. TCP (HTTP/1.1, HTTPS, FTP, SMTP, POP3), UDP and SOCKS5 protocols support. Configurations: proxy, web server, mail server, download manager, port mapping.
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Collabsuite
Linux Mail Server with Calendaring and IM
Collabsuite is an open source mail and collaboration software which is highly integrated and cost-effective. It provides comprehensive Linux mail server with calendaring and instant messaging functionality for enterprise. With all its high-end functionality, it is a great alternative to MS Exchange and other proprietary and expensive solutions. The Server is built on GNU/Linux Debian and makes use of various free software such as Postfix, Dovecot, Ejabberd, Darwin Calendarserver and SOGo. The Webclient is based on the popular Roundcube webmail software, while the Archiver is based on the open source edition of Mail Archiva and is bundled with the Dojo Toolkit for the Chat Archive Interface. -
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PhpXmail the web based management software for the Xmail mail server and GUI of it's administration extensions.
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A web based easy to use interface for creating Sieve scripts on an Cyrus Imapd mail server as well as allowing users to set access controls, create new mailboxes and view their mail quota. Also give administrators full administrative capabilities(quota,ac
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Aeromys is a webmail application designed for extremely fast access to email through the web. It accomplishes this goal by using predictive caching, meaning that information is retrieved from the mail server before it is requested by the user.
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AfterLogic WebMail Lite
Fast and easy-to-use webmail front-end for your existing mail server.
Fast and easy-to-use webmail front-end for your existing IMAP mail server, Plesk or cPanel. Install it on your web servers for personal or commercial use, redistribute, integrate with other software, or alter the source code (provided that you contribute your changes back to the community). For free. -
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The project is designed to automate the installation of QMail mail server in Debian Linux operating system
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This is a project initiated by the community around Stalkers CommuniGate Pro email server. The project is to maintain and develop an opensource WebSkin (interface) to the server. Platforms: Most UNIX's, AS/400, Windows etc. Look at Stalker.com.
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CheckeredFlag
CheckeredFlag is a super simple mail server.
CheckeredFlag is a super simple mail server. The intended use is for local application development that needs to be able to send email. CheckeredFlag runs on the local machine and doesn't need a network connection nor any special set up. Just run it and that is all. SMTP, POP, and webmail are provided, which means you can send email with any email client and recieve email with just about every email client. -
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Docker Mailserver
Production-ready fullstack but simple mail server
docker-mailserver provides a production-ready, all-in-one email server in a single container, focused on simplicity and maintainability. It bundles the core mail stack—Postfix for SMTP and Dovecot for IMAP/POP3—then layers in optional anti-spam and anti-virus services, DKIM/DMARC signing and verification, and rate-/abuse-protection tooling. The project emphasizes secure defaults while exposing configuration via environment variables and mounted files, allowing you to define users, aliases, domains, and sieve filters without rebuilding images. It integrates smoothly with Let’s Encrypt for TLS, supports LDAP and other auth backends, and ships with scripts to validate DNS records and common misconfigurations. Persistent volumes keep mailboxes and state, making upgrades straightforward and rollbacks less risky. Administrators appreciate the clear docs, test suite, and opinionated conventions that help avoid fragile bespoke setups. -
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The attachment grabber reads all emails from an IMAP or POP3 email server, extracts and saves the selected attachments from the emails in a folder on your hard drive or server.
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Foedus Mail is a mail server written in Java. The goal is to produce stable IMAP, SMTP, and POP3 support and then to build upon and refine it.
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WAP Email Server designed to take full advantage of the WAP protocol for reading email stored in a POP server from mobile devices in a fast and easy way.
