Carbonio Email Service provider

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The APPs listed below are available for download and installation on Android and iOS devices. They can communicate with either Carbonio CE or Carbonio servers.


It is the client that enables the handling of mail from iOS or Android mobile devices.

The conversations app allows users to create and access virtual meetings, conversations, and places from any location.

The Files app allows users to view, upload, and delete files in Carbonio Files. In addition, photographs and documents may be uploaded from mobile devices.

Mobile Apps Download

Preview in the Files App.

The Files App can preview the following file kinds. An unsupported file type can be accessed using an external application.

Mobile App Configuration

Please follow the instructions in this section to access your account with the Zextras mobile app. The technique is only necessary when configuring the first APP; all subsequent APPs can reuse the credentials established for the first App: in other words, access credentials are shared throughout Zextras Apps.

For example, if you install the Carbonio Mail App and set it to access the account, then you install the Carbonio Files App, you will be able to seamlessly access the files saved in Carbonio Files for that account.

The rest of the instructions are for configuring the Carbonio Mail App, but they are the same for other Apps.

Server-side configuration

The mobile application is turned on by default for all users. The following are the sole server-side requirements:

Port 443/HTTPS must be accessible from the internet.

A valid SSL/TLS certificate is required for the domain

The user with whom you log in using the Carbonio Mail App must be existent and active.

Login with Carbonio Mail.

To utilise Carbonio Mail App, follow the instructions below:

  1. Download the application (refer to the Mobile Apps Download section).
  2. Activate (see the Notifications section).
  3. Log in with the app.
  4. Email account name
  5. Password

The server name must match the FQDN. It is not essential to input the port number because 443 / HTTPS is enabled by default.


The Carbonio Mail mobile app connects to the server over HTTPS, and Carbonio answers with its certificate. This process (known as the SSL handshake) ensures data integrity and privacy for encrypted information exchanged between the client and the server, as long as the SSL certificate is current and not expired.

The Carbonio Mail App may fail to alert new messages due to Android device makers’ tight default notification settings.

To ensure that your device permits all necessary alerts, take these steps:

  1. Log out of the app.
  2. Access the device’s settings, then enter the Apps & Notifications option.
  3. Select Carbonio Mail from the list of all installed programmes.
  4. Enter the Notifications section.
  5. Enable alerts (first option at the top).
  6. Enable banner notifications in the Appointment and E-mail subsections.
  7. Log back in.

Notifications should now function.