Mobile Application Programmes

Mobile Application Programmes

On mobile devices running iOS or Android, the following APPs may be downloaded and installed. They can be used to communicate with Carbonio servers or Carbonio CE.


The client is what allows users of iOS or Android mobile devices to manage their mail.


conversations The Chats software ensures that wherever the user is, conversations, virtual meetings, and places may be created and used.


The user may read, upload, and even delete files stored in Carbonio Files using the Files app. Additionally, mobile device uploading of photos and documents is possible.

Downloading mobile apps
Mobile Clients Features
Mail App

Carbonio Mail is Zextras official and free app for Carbonio and Carbonio CE users and allows you to access all your Carbonio E-mails, calendars, and contacts from your mobile devices.

These are the main features of the Carbonio Mail app:

  • Complete e-mail management with default Inbox, Drafts, Junk, and Trash folders

  • Send later functionality

  • Customizable swipe actions from the preview of the email

  • Text formatting options

  • Set priorities to the outgoing emails

  • Attachment management

  • Create new folders

  • Manage your settings

  • Manage contacts

  • Full management of calendars and appointments

  • Search for emails or contacts in the unified Search tab

  • Dark theme

  • Tag e-mails

Chats App

The Carbonio Chats App is Zextras official and free app for Carbonio users and allows you to chat with colleagues and access shared spaces from your mobile devices.

The main features of the Carbonio Chats app are:

  • Send and receive text messages and emoticons

  • Manage, modify, and moderate 1-to-1 Chats and Group Chats, including the possibility to invite or remove attendees

  • Create or participate in virtual meetings

  • Share files in the chats

  • Enable or Disable Push Notifications

  • Dark mode supported

Files App

The Carbonio Files App is Zextras official and free app for Carbonio users, which allows to manage files and documents on Carbonio Files and share them with colleagues.

The main features of the Carbonio Files App are:

  • Securely access any file or folder in Carbonio Files from your smartphone

  • Move, copy, and delete files or folders

  • Upload new files

  • Edit file’s metadata (name, description)

  • Access shared files and folder

  • Manage trash folder

  • Manage links for sharing files and folders

  • UI support for tablets

  • Preview of multimedia files directly into the app

Preview in Files App

A preview of the following file types can be viewed in the Files App. An external application can be used to open unsupported file types.

  • iWork

  • Microsoft Office Documents

  • RTF documents

  • PDF

  • Images / Video / Audio files

  • TXT

  • OpenDocument (odt, ods, odp)

  • PDF

  • Images / Video / Audio files

  • TXT (coming soon)

  • OpenDocument (coming soon)

Configuration of mobile applications

This section provides instructions on how to access your Zextras account from a mobile app. All other Zextras applications will be able to use the credentials configured for the first app once the procedure has been completed.

For instance, if you install the Carbonio Mail App and set up access to the account, you will instantly be able to view the files saved in Carbonio Files for the same account after you install the Carbonio Files App.

The Carbonio Mail App is configured in the remaining sections, but the instructions apply to other Apps as well.

Configuration on the server side

All users have the mobile application activated by default. The only server-side needs are as follows:

  • Internet connectivity must be available for Port 443/HTTPS.
  • There must be an active SSL/TLS certificate for the domain.


Directions to install a valid certificate can be found in section Deploy an SSL Certificate.

  • The Carbonio Mail App requires that you connect in with an active and current user.
Use Carbonio Mail to log in.

Use Carbonio Mail App by doing the following actions:

  1. Download the programme (see the section on downloading mobile apps).
  2. Activate (see the Section for Notifications)
  3. Use an app to log in.


Login screen of Carbonio Mail app

enter the following date to log in:

  • Name of the email account
  • Password
  • The server name must be identical to the FQDN. The port number 443 and HTTPS are already configured, therefore there is no need to input them.

The HTTPS secure connection used by the Carbonio Mail mobile app connects to the server, and Carbonio replies with its certificate. If the SSL certificate is active and not expired, this process (also known as the SSL handshake) ensures data integrity and data privacy for the encrypted information sent between the client and the server.


Android device makers have stringent default settings that limit which apps may display notifications, which occasionally prevents the Carbonio Mail App from notifying users of new messages.

Observe these measures to ensure that your device permits all necessary notifications:

  1. Logging off the app
  2. Go to Settings on the smartphone, then choose the Apps & Notifications tab.
  3. From the list of all installed apps, choose the Carbonio Mail app.
  4. enter the section for notifications
  5. Activate the notifications (top-left option).
  6. Activate the banner notice on the Email and Appointment subsections.
  7. Re-log in

Now, notifications ought to function!


For push notifications to work on the device, the Carbonio server must be able to communicate with the service on port 443 (The exact URL to which notifications are sent is: )