nextcloud/mail

πŸ’Œ Mail app for Nextcloud

1,025

stars

17,997

commits

JavaScript

primary language

Sep 11, 2026

updated

apps.nextcloud.com/apps/mail
hacktoberfest
horde
imap
nextcloud
nextcloud-vue-app
open-source
php
php-mail
single-page-app
smtp
webmail
Browse cluster: Nextcloud Apps and Extensions β†’

README

Nextcloud Mail

Downloads REUSE status GitHub Workflow Status Codecov Renovate

πŸ’Œ A mail app for Nextcloud

Why is this so awesome?

  • πŸš€ Integration with other Nextcloud apps! Currently Contacts, Calendar, Files & Tasks – more to come.
  • πŸ“₯ Multiple mail accounts! Personal and company account? No problem, and a nice unified inbox. Connect any IMAP account.
  • πŸ”’ Send & receive encrypted mails! Using the great Mailvelope browser extension or the built-in support for S/MIME encryption and signatures.
  • πŸ“‘ Message threads! Now we have proper grouping of message threads.
  • πŸ—„οΈ Mailbox management! You can edit, delete, add submailboxes and more.
  • πŸ™ˆ We’re not reinventing the wheel! Based on the great Horde libraries.
  • πŸ“¬ Want to host your own mail server? We don’t have to reimplement this as you could set up Mail-in-a-Box, Stalwart or Dovecot!

If you experience any issues or have any suggestions for improvement, use the issue tracker. Please follow the issue template chooser so we get the info needed to debug and fix the problem. Thanks!

Ethical AI Rating

Priority Inbox

Rating: 🟒

Positive:

  • The software for training and inferencing of this model is open source.
  • The model is created and trained on-premises based on the user's own data.
  • The training data is accessible to the user, making it possible to check or correct for bias or optimise the performance and CO2 usage.

Thread Summaries (opt-in)

Rating: 🟒/🟑/🟑/πŸ”΄

The rating depends on the installed text processing backend. See the rating overview for details.

Learn more about the Nextcloud Ethical AI Rating in our blog.

Maintainers

Installation

The app is distributed through the app store and you can install it right from your Nextcloud installation.

Release tarballs are hosted at https://github.com/nextcloud-releases/mail/releases.

Get on board

For new contributors, please check out ContributingToNextcloudIntroductoryWorkshop

Development setup

Just clone this repo into your apps directory (Nextcloud server installation needed). Additionally, npm to fetch Node.js is needed for installing JavaScript dependencies and composer is needed for dependency management in PHP.

Once npm and Node.js are installed, PHP and JavaScript dependencies can be installed by running:

make dev-setup

We are also available on our public Mail development chat, if you want to join the development discussion. Please report bugs here on Github and open any questions and support tickets at the community forum.

Documentation

Need help? Check out our documentation. It's split into three parts.

Credits

This project uses CKEditor, which is licensed under the GPLv2.

Contributors

(top 30 of 178)

ChristophWurst

6,418 commits

nextcloud-bot

2,177 commits

GretaD

974 commits

nextcloud/mail

πŸ’Œ Mail app for Nextcloud

1,025

stars

17,997

commits

JavaScript

primary language

Sep 11, 2026

updated

apps.nextcloud.com/apps/mail
hacktoberfest
horde
imap
nextcloud
nextcloud-vue-app
open-source
php
php-mail
single-page-app
smtp
webmail
Browse cluster: Nextcloud Apps and Extensions β†’

README

Nextcloud Mail

Downloads REUSE status GitHub Workflow Status Codecov Renovate

πŸ’Œ A mail app for Nextcloud

Why is this so awesome?

  • πŸš€ Integration with other Nextcloud apps! Currently Contacts, Calendar, Files & Tasks – more to come.
  • πŸ“₯ Multiple mail accounts! Personal and company account? No problem, and a nice unified inbox. Connect any IMAP account.
  • πŸ”’ Send & receive encrypted mails! Using the great Mailvelope browser extension or the built-in support for S/MIME encryption and signatures.
  • πŸ“‘ Message threads! Now we have proper grouping of message threads.
  • πŸ—„οΈ Mailbox management! You can edit, delete, add submailboxes and more.
  • πŸ™ˆ We’re not reinventing the wheel! Based on the great Horde libraries.
  • πŸ“¬ Want to host your own mail server? We don’t have to reimplement this as you could set up Mail-in-a-Box, Stalwart or Dovecot!

If you experience any issues or have any suggestions for improvement, use the issue tracker. Please follow the issue template chooser so we get the info needed to debug and fix the problem. Thanks!

Ethical AI Rating

Priority Inbox

Rating: 🟒

Positive:

  • The software for training and inferencing of this model is open source.
  • The model is created and trained on-premises based on the user's own data.
  • The training data is accessible to the user, making it possible to check or correct for bias or optimise the performance and CO2 usage.

Thread Summaries (opt-in)

Rating: 🟒/🟑/🟑/πŸ”΄

The rating depends on the installed text processing backend. See the rating overview for details.

Learn more about the Nextcloud Ethical AI Rating in our blog.

Maintainers

Installation

The app is distributed through the app store and you can install it right from your Nextcloud installation.

Release tarballs are hosted at https://github.com/nextcloud-releases/mail/releases.

Get on board

For new contributors, please check out ContributingToNextcloudIntroductoryWorkshop

Development setup

Just clone this repo into your apps directory (Nextcloud server installation needed). Additionally, npm to fetch Node.js is needed for installing JavaScript dependencies and composer is needed for dependency management in PHP.

Once npm and Node.js are installed, PHP and JavaScript dependencies can be installed by running:

make dev-setup

We are also available on our public Mail development chat, if you want to join the development discussion. Please report bugs here on Github and open any questions and support tickets at the community forum.

Documentation

Need help? Check out our documentation. It's split into three parts.

Credits

This project uses CKEditor, which is licensed under the GPLv2.

Contributors

(top 30 of 178)

ChristophWurst

6,418 commits

nextcloud-bot

2,177 commits

GretaD

974 commits

Languages

JavaScript

48.7%

PHP

39.5%

Vue

10.8%