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SnappyMail App


SnappyMail is a simple, modern & fast web-based email client.

Default Setup

SnappyMail is pre-configured for use with Cloudron Email. The app automatically generates domain configuration for all the apps that have email enabled at installation time. If you enable or disable email on one or more domains, simply reconfigure the app and it will re-generate the necessary configuration.


SnappyMail has 2FA support built-in, it requires activating the "Two Factor Authentication" plugin as admin.

Activate the admin panel as explained below, log in as admin, activate the plugin. Afterwards, users can activate and configure 2FA under Settings.


Snappymail has several plugins that can be activated in the admin panel.

Rule of thumb (as for all software with plugins): Activate as little as possible for maximum stability.

Multi-domain Setup

There are two ways to use SnappyMail when using Cloudron Email with multiple domains.

  • Users can login with their email and password to access their mailbox. If the Cloudron has two domains, and, the user can login using and Aliases can be added as identities under SnappyMail settings.

  • Users can login using one of the email domains and add the other domains using the Add Account dialog. For example, user can login as and add in the Add Account dialog.

    Multiple accounts

    SnappyMail tracks accounts based on the login email. This means that in the example above, if the user logs in, the id will not show up.

External domains

To add one or more external domains, add them in SnappyMail's admin panel.


SnappyMail has simple filters built-in (see Settings - Filters).

More complex filters are possible but require knowledge of the Sieve language to as explained e.g. in these tutorials:

Vacation Email

An out of office / vacation mail message can be setup using Sieve filters.

require ["vacation"];
if true
    vacation :subject "Out of office" "Off to the alps!";

At most once a day

Vacation messages are sent at most once a day to the same sender. This setting cannot be changed.

Forwarding all emails

To forward all emails to an external mail, setup a Sieve filter as follows:

require ["copy","fileinto","vacation"];

if true
    redirect :copy "";

Admin panel

The admin panel is located at /?admin and is disabled by default.

To enable it:

  • Open a File manager and edit the file /app/data/_data_/_default_/configs/application.ini. Set the value of allow_admin_panel to On.

  • Visit on your browser. When you visit this URL, the admin password is generated at /app/data/_data_/_default_/admin_password.txt.

  • You can now login with the username admin and the password located at /app/data/_data_/_default_/admin_password.txt.

  • The file /app/data/_data_/_default_/admin_password.txt may be deleted after you made a note of the password.

  • Please change the password immediately.

Disable admin panel after use

We highly recommend disabling the admin panel after use.

Attachment size

To adjust the attachment size, change the PHP configuration and the SnappyMail configuration.

  • For PHP configuration, edit /app/data/php.ini using the File manager and add
upload_max_filesize = 40M
post_max_size = 40M
  • For SnappyMail configuration, edit /app/data/_data_/_default_/configs/application.ini using the File Manager and adjust attachment_size_limit.

Be sure to restart the app after making the above changes.

In addition to above, you also have to configure the mail server to allow large email.