Open Source Java Email Clients

K-9 Mail is an advanced, open-source email client for Android that's focused on making it easy to chew through large volumes of email. It's designed to be easy to use by both novice and power users, with plenty of useful features. It has IMAP push email support, support for multiple accounts, support for POP3 and Exchange 2003/2007 (with WebDAV), flagging, filing, signatures and more! K-9 Mail also offers a light and dark theme, keyboard shortcuts and emoji support. Like man's best friend, K-9 Mail is an email client you can depend on, and will surely be your best friend when it comes to handling your emails!

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.

G4J is a set of API that communicate to GMail. Use this API to login, retrive/search/browse message, download attachment and do others action on GMail account! An email application (Gmailer for java) is included to demonstrate the usage of the API.

CentraView - Browser based Enterprise Java (J2EE) Contact Management, Groupware, Collaboration, CRM, SFA, Project Management software. Run locally or as a hosted service. Built on Apache Tomcat, JBoss, MySQL, Linux (Fedora, RedHat and others) & Windows

LogicMail is a standalone E-Mail client designed to run on RIM BlackBerry handheld devices, providing full support for IMAP, POP, and SMTP over the device's Internet connection. Its exists to provide an alternative to the service-oriented "push" E

With Tiger Envelopes you can stop snoops from reading your email. Same email client. No extra steps. One click to install on Windows and Linux. Configures Outlook, Thunderbird, and KMail. Supports GPG, PGP, Bouncy Castle encryption.

WebMail is a Java Servlet application that gives users WWW access to their IMAP/POP mailboxes. It supports folders, multiple languages, composing messages, MIME and virtual domains.

Spamato is a spam filter system that combines several anti-spam techniques, from which thousands of users benefit. It is available as an add-on for Thunderbird and Outlook, and as a stand-alone proxy for other email clients. IMAP and POP are supported.

jwma (java webmail app) uses jakarta mail (formerly javamail) to provide access to an imap email store. Multiple users can authenticate, read, send and manipulate email storage and persist a list of contacts, email identities and their own individual preferences. It works with email stored in mbox or maildir format or stored in a derby database; it has been tested with dovecot.james and exim4. See http://jwma.sourceforge.net/ for further details.

Your own mailing system (most easiest to use with zero configuration) for the entire world (available in almost all the languages of the world) which will include Mail User Agent and Mail Transfer Agent thus trying to give maximum speed while transferrin

OlivaMail is a set of the java e-mail solutions: Webmail, Java Email Client (GUI), Command Line Utility (CLI) and the Core library.

DKIM for JavaMail is a small JAR that can be easily implemented in existing Java projects using JavaMail for sending DKIM signed emails.

JMail is a mail client written in Java. It handles attached files, HTML mails, filters and other stuff... It can be used with a LDAP directory.

Open-Xchange collaboration suite. Visit http://www.open-xchange.com/header/community_area.html to get more information about getting support and reporting bugs.

flap is a mail user agent written in pure Java. Its main distinctive feature is mounting message folders (like POP3 or IMAP) into a virtual folder tree, just like on Unix. Other features: macros language (w/ BeanShell) and extensive filter rules.

Daffodil Organizer is an e-mail client with the facility to import mails from the Microsoft Outlook's .pst files. In Daffodil Organizer mails are stored in RDBMS that provides maximum flexibility to organize your mails. You can also categorise your mail

Emailtray is a tray icon software that monitorize and notify emails on Yahoo, AOL and Gmail accounts free and apps. Work without email client software because it use web interface.

Free Java Office suite on the Web.

Special email client that works with multiple accounts. Main function - check for number of emails changed from last time, and delete selected emails. Using JavaMail for operation. Requires Java 6 to run.

IMAPWeb is web-based IMAP client. It is written using Java and uses the Enhydra platform. It supports folders, file attachments (sending and viewing), reply, forward (with attachments) and mail delete.

JAM Circle is a Kanban Application Platform on Eclipse RCP.Kanban is similar to sticky note.you can use it for GTD,Planning,Pull System using Kanban.It supports to send Card using XMPP and to define it\'s behavior using Script(JRuby and ECMAScript).

Jack Mail Client: jackmailclient: Mail Client in Java This is a simple mail client uses any mail server with a minimal configuration you will have a robost email client. Purely written in java.

Java SMTP/POP mail handling classes

Jnestor is a majordomo developed in java: it can reads an IMAP/POP3 folder (email folder), identifies the elements in it and process them, transforming them as Mantis issues. The software is still experimental, but it passed succesfully the last stages of testing and I hope I will release a stable version soon.

fruMailer is a cross platform MUA written in both Java and Perl. The GUI is based off of the toolbar-and-windows idea behind the GIMP.