Foire aux questions

Vous n'avez pas le temps ? Vous pouvez lire la rubrique d'aide dès que vous aurez un peu de tranquillité, puisqu'elle reste accessible sur votre application à tout moment et sans connexion internet.

Qu’est-ce que Delta Chat ?

Delta Chat is a reliable, decentralized and secure messaging app, available for mobile and desktop platforms.

Delta Chat feels like Whatsapp or Telegram but you can also use and regard it as an e-mail app. You can signup anonymously to a variety of interoperable chatmail servers which are minimal e-mail servers optimized for fast and secure operations. Or you may use classic e-mail servers and an existing e-mail account in which case Delta Chat acts as an e-mail app.

Comment puis-je trouver des gens avec qui discuter ?

To securely setup contact with others scan an invite QR code or share an invite link. This is required when using a (default) chatmail-based chat profile because chatmail servers reject un-encrypted outgoing messages.

If you create a chat profile with a classic e-mail address you may manually create a contact if you know their e-mail address and then write a message to them even if the recipient is not using Delta Chat.

Quels sont les avantages de Delta Chat par rapport aux autres messageries ?

Et si j’attends un message de quelqu’un avec qui je n’ai encore jamais échangé ?

Delta Chat prend-il en charge les images, vidéos et autres pièces jointes ?

Oui. En plus du texte brut, toutes les pièces jointes aux courriels sont affichées sous forme de messages séparés. Les messages sortants expédient automatiquement les pièces jointes que vous ajoutez.

What are profiles? How can I switch between them?

A profile is a name, a picture and some additional information for encrypting messages. A profile lives on your device(s) only and uses a chatmail or a classic e-mail server to transport messages.

On first installation of Delta Chat a first profile is created.

Later, you can tap your profile image in the upper left corner to Add Profiles or to Switch Profiles.

You may want to use separate profiles for political, family or work related activities, or e. g. for a dedicated “spam-profile” with which you register at websites and platforms that tend to cause unsolicited messages (“spam”) sooner or later.

You may also wish to learn how to use the same profile on multiple devices.

Qui peut voir ma photo de profil ?

Dans les paramètres vous pouvez ajouter une photo de profil. Si vous écrivez à vos contacts ou que vous les ajoutez via le QR code, ils la verront automatiquement comme votre photo de profil.

Can I set a Signature Text/Status/Motto with Delta Chat?

Yes, you can do so under “Settings > Profile > Signature Text”. Your contacts who use Delta Chat will see it when they view your contact details. To everyone else, It will appear as an e-mail signature below the text of all your messages.

Que signifient “épingler”, “sourdine” et “archiver” ?

Ces options vous permettent d’organiser et trier vos discussions :

Pour archiver ou épingler une discussion, faites un appui long sur la discussion concernée (Android), ouvrez le menu de la conversation (Android/application de bureau), ou balayez vers la gauche (iOS) ; pour mettre une discussion en sourdine, ouvrez le menu de la conversation (Android/application de bureau) ou le profil de la discussion (iOS).

Que signifie le point vert ?

How do disappearing messages work?

You can turn on “disappearing messages” in the settings of a chat, at the top right of the chat window, by selecting a time span between 1 minute and 5 weeks.

Until the setting is turned off again, each chat member’s Delta Chat app takes care of deleting the messages after the selected time span. The time span begins when the receiver first sees the message in Delta Chat. The messages are deleted both in each email account on the server, and in the app itself.

Note that you can rely on disappearing messages only as long as you trust your chat partners; malicious chat partners can take photos, or otherwise save, copy or forward messages before deletion.

Apart from that, if one chat partner uninstalls Delta Chat, the messages will not get deleted from their email account. They will most likely also not be decryptable anymore (as long as they were encrypted in the first place).


Création d’un groupe

Ajouter une personne à un groupe

J’ai quitté un groupe par accident.

Je ne souhaite plus recevoir les messages d’un groupe.

Que signifient les coches affichées à côté des messages sortants ?

Que se passe-t-il si j’active l’option “Supprimer les anciens messages sur le serveur” ?

Que se passe-t-il si j’active l’option “Supprimer les anciens messages de l’appareil” ?

Instant message delivery and Push Notifications

What are Push Notifications? How can I get instant message delivery?

Push Notifications are sent by Apple and Google “Push services” to a user’s device so that an inactive Delta Chat app can fetch messages in the background and show notifications on a user’s phone if needed.

Push Notifications work with all chatmail servers on

As of May 2024, classic e-mail servers do not support Push Notifications for Delta Chat users.

Are Push Notifications enabled on iOS devices? Is there an alternative?

Yes, Delta Chat automatically uses Push Notifications for chatmail profiles. And no, there is no alternative on Apple’s phones to achieve instant message delivery because Apple devices do not allow Delta Chat to fetch data in the background. Push notifications are automatically activated for iOS users because Delta Chat’s privacy-preserving Push Notification system does not expose data to Apple that it doesn’t already have.

Are Push notifications enabled / needed on Android devices?

If a “Push Service” is available, Delta Chat enables Push Notifications to achieve instant message delivery for all chatmail users. If you are using a classic e-mail provider instead of chatmail servers, Push Notifications are not available.

In the Delta Chat “Notifications” settings for “Instant delivery” you can change the following settings effecting all chat profiles:

Both “Background Connection” options are energy-efficient and safe to try if you experience messages arrive only with long delays.

How private are Delta Chat Push Notifications?

Delta Chat Push Notification support avoids leakage of private information. It does not leak e-mail, IP address or message content (not even encrypted) to any system involved in the delivery of Push Notifications.

Here is how Delta Chat apps perform Push Notification delivery:

As of May 2024, chatmail servers know about “device tokens” but we plan to encrypt this information to the notification proxy such that the chatmail server never learns the device token.

The central Delta Chat notification proxy is small and fully implemented in Rust and forgets about device-tokens as soon as Apple/Google/etc processed them, usually in a matter of milliseconds.

Resulting from this overall privacy design, even the seizure of a chatmail server, or the full seizure of the central Delta Chat notification proxy would not reveal private information that Push services do not already have.

Why does Delta Chat integrate with centralized proprietary Apple/Google push services?

Delta Chat is a free and open source decentralized messenger with free server choice, but we want users to reliably experience “instant delivery” of messages, like they experience from Whatsapp, Signal or Telegram apps, without asking questions up-front that are more suited to expert users or developers.

Note that Delta Chat has a small and privacy-preserving Push Notification system that achieves “instant delivery” of messages for all chatmail servers including a potential one you might setup yourself without our permission. Welcome to the power of the interoperable and massive chatmail and e-mail system :)

Encryption and Security

Which standards are used for end-to-end encryption?

Autocrypt is used for automatically establishing end-to-end encryption with contacts and group chats. Autocrypt uses a limited and secure subset of the OpenPGP standard. End-to-End encrypted messages are marked with a padlock padlock.

Secure-Join protocols are used for establishing chats with guaranteed end-to-end encryption which protects against network attacks and compromised servers. Chats marked with a green checkmark green checkmark guarantee end-to-end encrypted messages.

How can i know if messages are end-to-end encrypted?

All end-to-end encrypted messages carry a padlock:

padlock in bubble

End-to-end encryption is guaranteed if there is a green checkmark next to the chat title:

green checkmark in title

How can I get guaranteed end-to-end encryption and green checkmarks?

If you have a second communication channel with your chat partner, like a video chat or a different messenger, you can generate an invite link.

If you are together in person, you can show a QR code to your chat partner.

Let your chat partner scan the QR image with their Delta Chat app, or click “Copy” or “Share” to create an invite link and share it with your chat partner.

Now wait while Secure-Join network messages are exchanged between both devices.

Congratulations! You now will automatically use guaranteed end-to-end encryption with this contact and both of you can add each other to green-checkmarked groups green checkmark, thereby automatically spreading guaranteed end-to-end encryption among its members.

What does the green checkmark and “guaranteed end-to-end encryption” mean?

Chat titles with green checkmarks green checkmark mean that all messages in the chat will be end-to-end encrypted and can not be read or altered by compromised e-mail servers or Internet providers. Joining green-checkmarked group chats safely spreads everybody’s encryption information (and green checkmarks) in a manner that guarantees end-to-end encryption in the group and among members.

Contact profiles with green checkmarks green checkmark mean that messaging a contact is currently guaranteed to be end-to-end encrypted. Every green-checkmarked contact either did a direct QR-scan with you or was introduced by a another green-checkmarked contact. Introductions happen automatically when adding members to groups. Whoever adds a contact to a green-checkmarked group becomes an introducer to those members who didn’t yet know about the added contact. In a contact profile you can tap on the “Introduced by …” text repeatedly until you get to the one with whom you directly did a QR-scan.

Note that in a contact profile you may see and tap introducers but there is no green checkmark in the profile title. This usually means that the contact “sent a message from another device”.

For more in-depth discussion of “guaranteed end-to-end encryption” please see Secure-Join protocols and specifically read about “Verified Groups”, the technical term of what is called here “green-checkmarked” or “guaranteed end-to-end encrypted” chats.

A contact “sent a message from another device”, what can i do?

Your chat with a contact lost guaranteed end-to-end encryption. The green checkmark was removed for this chat and contact when you see this warning. If you find the sudden drop of guaranteed end-to-end encryption surprising for this contact then don’t accept the warning! Instead check with your contact through a second channel like a video call, other messenger or a phone call, to find out what happened.

If your contact actually caused the drop of guaranteed end-to-end encryption please see the next paragraphs for common reasons and their mitigations. Regardless, all other green-checkmarked chats remain guaranteed end-to-end encrypted even if the contact is a member there.

Your contact is using Delta Chat on a second device (phone or laptop)

If they have another device with a Delta Chat app running, they should remove the profile from the new device and add it as a second device as described here. As soon as they message you afterwards, the warning will be gone and guaranteed encryption is established with both devices of your contact.

Your contact reinstalled Delta Chat using their old account login

If they have a backup file, they should remove the profile from the new device and rather import the backup file to re-create their profile. As soon as they message you afterwards, the warning will be gone and guaranteed encryption is re-established for this contact.

If they don’t have a backup file, it’s best to perform a QR scan with your chat partner to re-establish guaranteed end-to-end encryption.

Your contact sent a mail through a webmail interface or another e-mail app and will get back to using Delta Chat soon again.

If you are sure that the contact sometimes uses webmail, or another mail app lacking end-to-end encryption, then you may accept the warning. As soon as your contact uses Delta Chat again, guaranteed end-to-end encryption will be automatically re-established.

Your contact stopped using Delta Chat entirely

Sometimes remaining in contact is more important than end-to-end encryption. “Transport Layer Encryption” (TLS) may still meaningfully protect the confidentiality of your messages between your device and the e-mail server. But without end-to-end encryption you and your contact are trusting your e-mail server to not read or manipulate your messages, and to not hand them to third parties.

In any case, you can not do much else than accept the warning. Please also remove the contact from any active green-checkmarked group which you can find in “Shared chats” in the Contact profile. This spares your contact from getting “unreadable” messages.

If the contact removed Delta Chat because of buggy or undesirable behaviour, please consider posting to our support forum to help us identify and address common problems. Thanks!

Are attachments (pictures, files, audio etc.) end-to-end encrypted?


When we talk about an “end-to-end encrypted message” we always mean a whole message is encrypted, including all the attachments and attachment metadata such as filenames.

Is OpenPGP secure?

Yes, Delta Chat uses a secure subset of OpenPGP and only displays a padlock security indicator on a message if the whole message is properly encrypted and signed. For example, “Detached signatures” are not treated as secure.

OpenPGP is not insecure by itself. Most publically discussed OpenPGP security problems actually stem from bad usability or bad implementations of tools or apps (or both). It is particularly important to distinguish between OpenPGP, the IETF encryption standard, and GnuPG (GPG), a command line tool implementing OpenPGP. Many public critiques of OpenPGP actually discuss GnuPG which Delta Chat has never used. Delta Chat rather uses the OpenPGP Rust implementation rPGP, available as an independent “pgp” package, and security-audited in 2019.

We aim, along with other OpenPGP implementors, to further improve security characteristics by implementing the new IETF OpenPGP Crypto-Refresh which was thankfully adopted in summer 2023.

Did you consider using alternatives to OpenPGP for end-to-end -encryption?

Yes, we are following efforts like MLS or Saltpack but adopting them would mean breaking end-to-end encryption interoperability with all other e-mail apps that typically support OpenPGP encryption. So it would not be a light decision to take and there must be tangible improvements for users.

Delta Chat takes a holistic “usable security” approach and works with a wide range of activist groupings as well as renowned researchers such as TeamUSEC to improve actual user outcomes against security threats. The wire protocol and standard for establishing end-to-end encryption is only one part of “user outcomes”, see also our answers to device-seizure and message-metadata questions.

Is Delta Chat vulnerable to EFAIL?

No, Delta Chat never was vulnerable to EFAIL because its OpenPGP implementation rPGP uses Modification Detection Code when encrypting messages and returns an error if the Modification Detection Code is incorrect.

Delta Chat also never was vulnerable to the “Direct Exfiltration” EFAIL attack because it only decrypts multipart/encrypted messages which contain exactly one encrypted and signed part, as defined by the Autocrypt Level 1 specification.

Is a message exposed in cleartext if end-to-end encryption is not available?

Even if your messages are not guaranteed to be end-to-end encrypted, they are still protected from Internet providers like cell or cable companies. However, your and your recipient’s e-mail providers may read, analyze or even modify your messages, including any attachments, if they are not end-to-end encrypted.

Delta Chat by default uses strict TLS encryption which secures connections between your device and your e-mail provider. All of Delta Chat’s TLS-handling has been independently security audited. Moreover, the connection between your and the recipient’s e-mail provider will typically be transport-encrypted as well. If the involved e-mail servers support MTA-STS then transport encryption will be enforced between e-mail providers in which case Delta Chat communications will never be exposed in cleartext to the Internet even if the message was not end-to-end encrypted.

Note that maintaining guaranteed end-to-end encryption on top of TLS encryption provides pervasive safety between your and the recipient’s devices. Not even your e-mail or Internet provider will be able to read or modify your messages.

How does Delta Chat protect metadata in messages?

Delta Chat protects most message metadata by putting the following information into the end-to-end encrypted part of messages:

E-Mail servers do not get access to this protected metadata but they do see the message date as well as the message size, and, more importantly, the sender and receiver addresses. E-mail servers need receiver addresses to route and deliver messages to recipient’s devices.

How to protect metadata and contacts when a device is seized?

Both for protecting against metadata-collecting e-mail servers as well as against the threat of device seizure we recommend to use a chatmail server to create pseudonymous temporary profiles through QR-code scans. Note that Delta Chat apps on all platforms support multiple profiles so you can easily use situation-specific profiles next to your “main” profile with the knowledge that all their data, along with all metadata, will be deleted. Moreover, if a device is seized then contacts using temporary profiles can not be identified easily, as compared to messengers which reveal phone numbers in chat groups which in turn are often associated with legal identities.

How can i check encryption information?

You may check the end-to-end encryption status manually in the “Encryption” dialog (user profile on Android/iOS or right-click a user’s chat-list item on desktop). Delta Chat shows two fingerprints there. If the same fingerprints appear on your own and your contact’s device, the connection is safe.

How can I check the encryption status of messages?

A little padlock in a message bubble denotes that the message was properly end-to-end encrypted from the given sender. If there is no padlock, the message was not properly end-to-end encrypted most likely because the sender uses an app or webmail interface without support for end-to-end–encryption.

Why do I see unencrypted messages?

If a contact uses a non-Autocrypt e-mail app, all messages involving this contact (in a group or 1:1 chat) will not be end-to-end encrypted, and thus not show a “padlock” with messages. Note that even if your contacts use Delta Chat on their account, they might also use a non-Autocrypt e-mail app on that account which then may cause intermittently unencrypted messages. Replying unencrypted to unencrypted messages is mandated by Autocrypt to prevent unreadable messages on the side of your contacts and their non-Autocrypt e-mail app.

How can i get an end-to-end encrypted chat with a Delta Chat contact who sometimes uses webmail or another non-Autocrypt e-mail app?

If you need a safely end-to-end encrypted chat with a contact who is using their e-mail account both with Delta Chat and non-Autocrypt apps (e.g. webmail), it’s best to setup guaranteed end-to-end encryption with them and then create a guaranteed end-to-end encrypted group chat with you two as members. In this group chat all messages will be end-to-end encrypted even if the direct chat between you two has a “… sent a message from another device” warning.

How can I ensure message end-to-end encryption and deletion?

The best way to ensure every message is end-to-end encrypted, and metadata deleted as quickly as possible is using chats with guaranteed end-to-end encryption and turning on disappearing messages.

Guaranteed end-to-end encrypted chats protect against MITM attacks and turning on disappearing messages deletes the messages on the server after a user-configured time.

If you don’t need a longer-lived copy of your messages on the server, you can also turn on “delete messages from server automatically”.

Does Delta Chat support Perfect Forward Secrecy?

No, Delta Chat doesn’t support Perfect Forward Secrecy (PFS). This means that if your Delta Chat private decryption key is leaked, and someone has collected your prior in-transit messages, they will be able to decrypt and read them using the leaked decryption key.

Note, however, that if anyone obtains to your decryption keys, they will typically also be able to obtain your messages, irrespective if Perfect Forward Secrecy is in place or not. The typical real-world situation for leaked decryption keys is device seizure which we discuss in our answer on metadata and device seizure.

It is possible that Delta Chat evolves to support Perfect Forward Secrecy, because OpenPGP is just a container for encrypted messages but encryption key management (and thus key rotation or key “ratcheting”) could be organized in flexible ways. See Seqouia’s PFS prototype for existing experiments in the OpenPGP implementor community.

Is end-to-end encryption of Delta Chat as safe as Signal?

It depends on what is important to you. Delta Chat does not support PFS like Signal does but it provides guaranteed end-to-end encrypted chats that are safe against compromised servers or corrupted networks. Signal and most other PFS-supporting messengers do not provide a practical scheme for protecting chat groups from network attacks which are arguably more worrysome than a potential attacker who seizes your phone and private encryption setup but somehow not your messages, yet has a full record of all past encrypted messages.

In any case, Delta Chat’s end-to-end encryption uses a secure subset of OpenPGP which has been independently security-audited.

Puis-je ré-utiliser ma clé privée existante ?

Oui. The best way is to send an Autocrypt Setup Message from the other e-mail client. Look for something like Start Autocrypt Setup Transfer in the settings of the other client and follow the instructions shown there.

Alternatively, you can import the key manually in “Settings -> Advanced settings -> Import secret keys”. Caution: Make sure the key is not protected by a password, or remove the password beforehand.

If you don’t have a key or don’t even know you would need one - don’t worry: Delta Chat generates keys as needed, you don’t have to hit a button for it.

Je n’arrive pas à importer ma clé PGP existante dans Delta Chat.

L’origine la plus probable de ce problème est que votre clé est chiffrée ou requiert un mot de passe, ou les deux. Ce type de clés n’est pas géré par Delta Chat. Vous pouvez tenter de retirer le chiffrement et le mot de passe puis réessayer l’importation.

Another common error is having the wrong file ending. Use the ASCII armored format and an .asc file ending.

Delta Chat gère les formats de clé privée OpenPGP les plus communs, néanmoins il est peu probable que les clés privées générées par toutes les sources soient prises en charge. Mais l’objectif principal de Delta Chat n’est pas là. En pratique, la majorité des nouveaux utilisateurs ne possèdent pas de clés de chiffrement avant d’utiliser Delta Chat. Néanmoins, nous essayons de gérer les clés privées d’autant de sources que possible.

La méthode pour retirer le mot de passe de la clé privée dépend du logiciel que vous utilisez pour gérer vos clés GPG. Avec Enigmail, vous pouvez définir votre mot de passe en laissant le champ vide dans la fenêtre de Gestion des Clés. Avec GnuPG, vous pouvez le définir avec la ligne de commande. Pour les autres programmes, vous devriez pouvoir trouver la solution en ligne.

Est-ce qu’un audit indépendant des failles de sécurité a été réalisé sur Delta Chat ?

The Delta Chat project underwent four independent security audits and one independent security analysis, from most recent to older:


Puis-je utiliser Delta Chat sur plusieurs appareils en même temps?

Oui. Delta Chat 1.36 comes with a new, experimental function for using the same profile on different devices:

Contrairement à de nombreuses autres messageries, une fois le transfert terminé, les deux appareils sont complètement indépendants. L’un n’a pas besoin de l’autre pour pouvoir fonctionner.


Manual Transfer

Recourez à cette méthode uniquement si les instructions ci-dessus pour “Ajouter un deuxième appareil” ont échoué.

Le lancement d’un client Web Delta Chat est-il prévu ?

webxdc apps

In Delta Chat, you can share webxdc apps, attachments with an .xdc file extension. They can do very different things, and make Delta Chat a truly extendable messenger.

How private are webxdc apps?

Where can I get webxdc apps?

How can I create my own webxdc apps?

Fonctionnalités expérimentales

We are very grateful for feedback on these features - do you want to share your ideas? Join the Forum to contribute. You may conveniently login via Delta Chat and a QR code scan, another rather stable experiment we run on the side (sic!).

Comment passer des appels audio/vidéo avec Delta Chat ?

Que sont les listes de diffusion et comment les utiliser ?

Comment partager ma géolocalisation avec mes contacts ?

Que protège réellement le chiffrement expérimental de base de données ?

Pourquoi peut-on choisir de ne consulter que le dossier Delta Chat ?

Il s’agit d’un paramètre expérimental à destination des personnes qui expérimentent avec des règles côté serveur. Tous les fournisseurs ne le prennent pas en charge, mais certains permettent de déplacer tous les courriels avec un en-tête “Chat-Version” dans le dossier DeltaChat. Normalement, cette action est réalisé par l’application Delta Chat.

Activer l’option “Ne consulter que le dossier Delta Chat” est intéressant si vous avez à la fois :

Si ces deux conditions sont remplies, Delta Chat n’a pas besoin de surveiller la boîte de réception, seulement le dossier Delta Chat.

Comment changer mon compte pour une adresse courriel différente ?

  1. Change your address in “Settings → Advanced → Password and Account” and enter the password of your new e-mail account (and if necessary, server settings). You will get an information notice about the fact that you are moving to a new address. An additional notice will also show up in your “Device messages” chat.

  2. If possible, let your old e-mail provider forward all messages to your new address.

  3. Tell your contacts that you changed your address. Writing to guaranteed end-to-end encrypted chats and groups, will make them notice your move automatically and they will continue chatting with you using your new address.

Note that Delta Chat will not retrieve messages anymore from your old e-mail provider. If you didn’t configure your e-mail provider to forward messages (step 2.) only those contacts to whom you sent a message in a guaranteed end-to-end encrypted chat will send messages to your new address.

To learn more about this the details behind this, read our blogpost on it.


De quelles autorisations Delta Chat a-t-il besoin?

Selon le système d’exploitation utilisé, il vous sera peut-être demandé d’accorder des autorisations à l’application. Voici ce que fait Delta Chat avec ces autorisations:

Est-ce que Delta Chat fonctionne avec mon fournisseur de courriel ?

Je veux administrer mon propre serveur courriel pour Delta Chat : que me conseillez-vous ?

Pourquoi dois-je entrer le mot de passe de mon compte de courriel dans Delta Chat ? Est-ce sécurisé ?

Comme pour les autres clients de courriel, Thunderbird, FairEmail, K9-Mail, Outlook, etc, celui-ci a besoin des identifiants / mots de passe pour recevoir et envoyer des courriels. Bien sûr le mot de passe est uniquement stocké sur votre appareil. Et il est utilisé uniquement pour vous authentifier auprès de votre fournisseur de courriel, qui a, rappelons-le, accès à vos courriels non chiffrés.

Si vous utilisez un fournisseur de courriel qui prend en charge OAuth2, comme ou, il n’est pas nécessaire de stocker votre mot de passe sur votre appareil. Dans ce cas, seul un jeton d’accès est utilisé.

Comme Delta Chat est un logiciel libre, vous pouvez étudier le code source pour vérifier que vos identifiants / mots de passe sont utilisés de façon sécurisée. Nous sommes très heureux d’avoir des retours pour renforcer la sécurité de l’application.

Quels sont les messages qui apparaissent dans Delta Chat ?

Par défaut, Delta Chat affiche tous les courriels.

At “Settings → Advanced → Show Classic E-Mails”, you can change this. You have these options:

Est-ce que Delta Chat gère les courriels en HTML ?

Yes, incoming HTML messages come with a “Show full message” button. Outgoing messages always use plain text.

Can I set the E-Mail Subject with Delta Chat?

Delta Chat sets (and encrypts!) the classic e-mail subject automatically to the group name or to the sender name.

So if you want to set the subject yourself, for example for a formal e-mail to a business contact, you can create a group with only yourself and the recipient(s). Set the Chat Title to the Subject you want, and then send your e-mail as the first message. If the recipients don’t use Delta Chat, it will look like a normal, formal e-mail to them. You will get bonus professionalism points if you set a signature text.

Quel est l’intérêt du paramètre “M’envoyer une copie”?

Envoyer une copie de vos messages à vous-même garantit que vous recevez vos propres messages sur tous les appareils. Si vous avez de multiples appareils et que vous ne l’activez pas, vous voyez seulement les messages des autres personnes et les messages que vous avez envoyé depuis l’appareil en cours.

La copie est envoyée dans la Boîte de réception puis déplacée dans le dossier DeltaChat; elle n’est pas mise dans le dossier “Envoyés”. Delta Chat ne téléverse jamais quelque chose dans le dossier Envoyés car ça signifierait de le téléverser deux fois (une fois via SMTP, puis une fois dans le dossier Envoyés via IMAP).

The default setting for “Send Copy to Self” is “on”.

Pourquoi puis-je choisir de regarder le dossier “Envoyés”?

La seule raison de regarder le dossier Envoyés est si vous utilisez un autre programme de courriel (tel que Thunderbird) en parallèle de votre application Delta Chat, et que vous voulez que votre client de messagerie participe aux discussions.

Cependant, nous recommandons d’utiliser le client de bureau Delta Chat; vous pouvez le télécharger sur L’option de regarder le dossier “Envoyés” pourrait disparaître dans le futur. Elle a été introduite à une époque où il n’y avait pas de client de bureau Delta Chat disponible sur toutes les plateformes.

Pourquoi puis-je choisir de ne pas regarder le dossier Delta Chat?

Certaines personnes utilisent Delta Chat comme un client de messagerie normal, et veulent utiliser la Boîte de réception pour leurs mails au lieu d’utiliser le dossier DeltaChat. Si vous désactivez “Surveiller le dossier DeltaChat”, vous devriez aussi désactiver “déplacer les messages de discussions dans DeltaChat”. Sinon, la suppression de messages dans une configuration multi-appareils pourrait ne pas marcher correctement.

Delta Chat est-il compatible avec Protonmail / Tutanota / Criptext ?

Comment supprimer mon compte ?

Étant donné que vous utilisez Delta Chat à travers un compte courriel, la façon dont vous pouvez supprimer votre compte dépend de votre fournisseur de courriel. Comme nous n’exerçons aucun contrôle sur votre compte courriel, nous ne sommes pas en mesure de vous aider à le supprimer.

Si vous souhaitez conserver votre compte mais désinstaller Delta Chat, nous vous recommandons de quitter toutes les discussions de groupe avant de procéder à la désinstallation.

Les détails techniques m’intéressent. Pouvez-vous m’en dire plus ?

Comment est financé le développement de Delta Chat ?

Delta Chat ne reçoit par de fonds en capital-risque, n’est pas endetté et ne subit aucune pression pour générer de gros profits ou vendre ses utilisateurs et utilisatrices - en même temps que leurs amis et leur famille - à des annonceurs (ou pire). Nous préférons utiliser des fonds provenant d’institutions publiques, jusqu’à présent basées en Europe ou aux États-Unis, pour soutenir nos efforts de développement d’un système de messagerie diversifié et décentralisé, basé sur les contributions de la communauté du libre et de l’open-source.

Jusqu’à présent, le développement de Delta Chat a été financé par les sources suivantes :

Faire un don

Les financements mentionnés précédemment sont gérés principalement par merlinux GmbH à Fribourg (Allemagne) et redistribués à plus d’une douzaine de contributeurs et contributrices du monde entier.

N’hésitez pas à consulter les Canaux de contribution à Delta Chat Contribution pour en savoir plus sur les différentes manières de contribuer, financières ou non.