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Apache James

Apache James
Developer(s)Apache Software Foundation
Stable release
3.8.2 / January 29, 2025 (2025-01-29)[1]
RepositoryJames Repository
Written inJava
PlatformJava SE
TypeMail transfer agent
LicenseApache License 2.0
Websitejames.apache.org

Apache James, or Java Apache Mail Enterprise Server, is an open source SMTP and POP3 mail transfer agent written entirely in Java.[2] James is maintained by contributors to the Apache Software Foundation, with initial contributions by Serge Knystautas.[3][4] IMAP support was added in 2010 in version 3.0-M2 (released as stable 3.0.0 in 2017), and JMAP support in version 3.6.0 in 2021. In 2021 open source company Linagora upgraded the government system providing email for every citizen of Estonia to use Apache James.[5][6]


The James project manages the Apache Mailet API which defines "matchers" and "mailets". These allow users to write their own mail-handling code, such as to update a database, build a message archive, or filter spam.[2] A matcher is used to classify messages based on some criteria, and then determines whether the message should be passed to an appropriate mailet for processing. Mailets are so-called due to their conceptual similarity to a servlet,[7] and arose because Sun Microsystems declined a proposal to include mail-handling in the servlet implementation.[4] James ships with a variety of pre-written matchers and mailets to serve common tasks.[7] Many sets of mailets and matchers can be combined to produce sophisticated and complex functional behaviour.

The Apache James project also produces pure Java libraries for implementing Sender Policy Framework (SPF), the Sieve mail filtering language, and parsing MIME content streams, independent of Sun's JavaMail API.

  1. ^ "GitHub tag: james-project-3.8.2". GitHub. Retrieved May 9, 2025.
  2. ^ a b James Server - Overview
  3. ^ "James Project - Who We Are". Archived from the original on 2011-11-01. Retrieved 2008-02-22.
  4. ^ a b Cite error: The named reference boardminutes was invoked but never defined (see the help page).
  5. ^ "Apache James". Linagora. Retrieved January 27, 2025.
  6. ^ "Highlight Track: Getting Apache James to serve 1M+ digital mailboxes of all Estonian residents". ApacheCon@Home. ApacheCon. September 21, 2021. Retrieved January 27, 2025.
  7. ^ a b Claude Duguay (2003-06-10). "Working with James". IBM. Archived from the original on 29 January 2008. Retrieved 2008-02-22.

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