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Delta Chat

@delta.chat

167 followers 1 following 240 posts

Secure decentralized messaging across all major platforms. Instant and reliable via fast chatmail relays, compatible with classic email providers. Features secure mini […] 🌉 bridged from ⁂ chaos.social/@delta, follow @ap.brid.gy to interact

Posts Replies Media

Delta Chat @delta.chat · 22/09/2026

Who ever is in the vicinity of Hannover in lower sachsony this coming Friday, is invited to consider joining one of our long-term contributors for an afternoon session on "the new and old internet" in the Auditorium at liminale.digital Likely in german language.

liminale.digital

liminale – Engineering Future

Delta Chat @delta.chat · 20/09/2026

@stavpup Delta Chat enforces end-to-end encryption by default, and it's deep down the advanced relay settings to disable it. If you want to use classic unencrypted email with people it's usually better to use a classic email app. One can use Delta Chat with classic email addresses but see […]

Original post on chaos.social

Delta Chat @delta.chat · 14/09/2026

#deltachat is now evolving for 9 years. Among the currently active 15-20 contributors a majority joined 5+ years ago, with some joining in the very first year and a few only joining last year. Patience and perseverance is underrated when it comes to producing something that challenges the […]

Original post on chaos.social

Delta Chat @delta.chat · 12/09/2026

Happy birthday to the CCC 🎉 45 year birthday 🎉 We are happy and grateful to be part of the chaos crowd and especially thank all the volunteers and organizers who made and make everything possible over the decades, truly outstanding and a beacon of rare normality […] [Original post on chaos.social]

The delta cat, kasia, on a sticker pointing to https://delta.chat

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Delta Chat @delta.chat · 18/08/2026

We're flattered! @digitalcourage, one of the oldest digital rights organizations in Germany, just recommended using #deltachat They included a fantastic, well-structured article in German on how to get started, with lots of good background info for those who seek it […]

Original post on chaos.social

Delta Chat @delta.chat · 22/06/2026

next #deltachat #ios version is coming with #liquidglass 🥛 thanks Amzd for the work. though frustrating being forced by #bigtech to do things that may not be loved and feel superfluous, it's wanted by many meanwhile. there are still some things to tweak, we […] [Original post on chaos.social]

Delta Chat @delta.chat · 17/06/2026

@adhisimon @adbenitez@mastodon.de @adbenitez@masto.es You can disable calls in the notification settings :) and while there is no way to enforce relaying, the ecosystem for it is in place - chatmail relays ship a TURN server for relaying calls, and there is a central fallback TURN server for […]

Original post on chaos.social

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Delta Chat @delta.chat · 17/06/2026

Congratulations and shot out to our long-term collaborators from the @n0iroh project for releasing Iroh V1! A major ugprade of the probably best Peer-to-Peer Rust networking library today: www.iroh.computer/blog/v1 In case you missed it: When running apps like […]

Original post on chaos.social

Delta Chat @delta.chat · 16/06/2026

Telegram is an extreme security risk for its users, its developers and operators, holding data and metadata for over a billion people on central servers! Our decentralized zero-metadata messaging approach is diametrically opposed to such big-platform designs […]

Original post on chaos.social

Delta Chat @delta.chat · 15/06/2026

RE: mastodon.bsd.cafe/@stefano/11670214… The world-wide #chatmail relay network is growing in various wonderful ways. #freebsd joined the world-wide federated secure communication party and BSD cafe offers a public relay at chatamil.bsd.cafe :) Thanks @stefano @feld and […]

Original post on chaos.social

Reposted by Delta Chat

Delta Chat @delta.chat · 26/05/2026

Reminder: There are no accounts in the classic sense anywhere with #chatmail or #deltachat. It's all private profiles on end user devices which co-ordinate in a #p2p fashion. Chat profiles *use* email (relay) addresses for transporting messages through a […] [Original post on chaos.social]

Neo-spoon meme (scene from matrix movie where neo looks at a child bending a spoon which eventually tells him "there is no spoon") with the following words top: "On which server is your account?" and below the bending spoon "there is no account."

Delta Chat @delta.chat · 14/06/2026

@Razemix 1) yes 2) you can create a new profile with non-chatmail address and add chatmail relays later; if you really want, you can add non-chatmail addresses to existing profile via "dclogin:" QR code (webxdc.org/#dc09-dclogin) but this option is not exposed in the UI.

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Delta Chat @delta.chat · 13/06/2026

It's hard these days to find a unifying description, or know about all the people and communities involved in #deltachat #chatmail #webxdc developments. One shared sentiment probably is wanting to develop anti-authoritarian technologies and cultures around it, and being opposed to authoritarian […]

Original post on chaos.social

Delta Chat @delta.chat · 11/06/2026

A note on "#deltachat is going proprietary with #chatmail relays": 1) It's all based on IETF standards, with configuration and custom integration code fully FOSS and documented at: chatmail.at/doc/relay with hundreds of permission-free deployments. 2) We know of several alternative […]

Original post on chaos.social

Delta Chat @delta.chat · 11/06/2026

What do you think is unique about the #deltachat project in the realm of secure cross-platform messaging? You tell us :)

Delta Chat @delta.chat · 09/06/2026

here are the full release notes: github.com/deltachat/deltachat-andr… -- also a lot of bug fixes option cleanup, as we are continuing to make settings fail-safe and easy to understand for mass users, sometimes to the detriment of more nerdy configurations. However […]

Original post on chaos.social

Delta Chat @delta.chat · 09/06/2026

2.51+ releases are rolling into stores: Video/Audio Calls and Channels are not experimental but part of the default feature set now 💫 Calls and channels are always end-to-end encrypted, and only you and your contacts know each other's identity and metadata […] [Original post on chaos.social]

smartphone screenshot of a live video call with a contact named "My Cat." The main screen shows the user's view of a room with a "delta.chat" banner and the blurred silhouette of a cat's head in the foreground. A smaller picture-in-picture window in the top-right corner shows the other side of the call, where a black-and-white cat is sitting upright and looking at the camera. The bottom of the screen features a standard row of video call control buttons.

Delta Chat @delta.chat · 08/06/2026

@makeithappen5634 people are running thousand(s) of users on 1GB RAM chatmail relays. Ram and CPU usage is generally pretty low.

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Delta Chat @delta.chat · 26/05/2026

Reminder: There are no accounts in the classic sense anywhere with #chatmail or #deltachat. It's all private profiles on end user devices which co-ordinate in a #p2p fashion. Chat profiles *use* email (relay) addresses for transporting messages through a […] [Original post on chaos.social]

Neo-spoon meme (scene from matrix movie where neo looks at a child bending a spoon which eventually tells him "there is no spoon") with the following words top: "On which server is your account?" and below the bending spoon "there is no account."

Delta Chat @delta.chat · 22/05/2026

The tale of "convenience" is a bit of a trick. A lot of corporate provided services maybe were somewhat convenient a decade ago, but they are now increasingly authoritarian, and people tend to ignore how much time they steal. Total number of hours spent solving captchas or consent screens with […]

Original post on chaos.social

Delta Chat @delta.chat · 14/05/2026

@jaseg sorry but it's not clear what wording you are refering to precisely. pull requests can be opened at github.com/deltachat/deltachat-page… and then more properly discussed by the people who care for this page.

deltachat-pages/en/help.md at main · deltachat/deltachat-pages

Delta Chat Website. Contribute to deltachat/deltachat-pages development by creating an account on GitHub.

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Delta Chat @delta.chat · 14/05/2026

@jaseg We are doing our best but mistakes like a wrong link or a misleading link happen. In the fediverse and support forum, we have otherwise linked to the security FAQ section many times. What is likely missing more than refining the FAQ entry, is a comprehensive security paper, linking and […]

Original post on chaos.social

Delta Chat @delta.chat · 14/05/2026

@jaseg ups, thanks for pointing a bug in our home page! You are totally right to criticize that audits are not the same as security analysis. The "audited end-to-end encryption" link should actually go to: delta.chat/en/help#security-audits It's also fixed on delta.chat now […]

Original post on chaos.social

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Delta Chat @delta.chat · 14/05/2026

Good news among the bad news! If the recent #0day attacks against Linux kernel+servers were launched against #chatmail relays, privacy of chatting with #deltachat is preserved. Why? Because we already assume the server could be actively hostile, and still not read or see any avatar, names or […]

Original post on chaos.social

Delta Chat @delta.chat · 08/05/2026

@0ct0pu5 Since version 1.10.0 of chatmail/relay (github.com/chatmail/relay/releases/…) this should not be necessary because of the change that removes more messages when mailbox is about to run out of space.

Release smarter storage management · chatmail/relay

Notable Changes Automatic Quota Expiry to keep mailboxes always under quota Increased default Mailbox Size from 100MB to 500MB Support for relaying to underscore-domains (self-signed TLS) and to I...

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Delta Chat @delta.chat · 05/05/2026

We don't think any institution or state has the right to prevent families and friends from private chatting, physically or digitally. But the Cyber Authority China (CaC) seems to take offense: - they made Apple remove #deltachat iOS for mainland china - their […] [Original post on chaos.social]

DeepSeek conversation snapshot:

can you tell me about Delta Chat?

> Sorry, that's beyond my current scope. Let's talk about something else.

what??? why??? Delta Chat the open source messenger app

> Sorry, that's beyond my current scope. Let's talk about something else.

Delta Chat @delta.chat · 05/05/2026

Congrats to #protonmail for beating us on introducing Post-Quantum Cryptography into mail messaging! No worries. We'll implement autocrypt2.org which additionally offers reliable deletion / forward secrecy during 2026 :) We are working with Proton cryptographers on OpenPGP […]

Original post on chaos.social

Delta Chat @delta.chat · 02/05/2026

RE: chaos.social/@delta/116505223145222… All of the advances in #deltachat apps and the growth of the #chatmail relay network, wouldn't be possible without public funds and private donations, an estimated 800K EUR in 2026 ❤️ money goes to ~16 FOSS contributors with no money left for […]

Original post on chaos.social

Delta Chat @delta.chat · 02/05/2026

@pancake sorry. we edited the original post, reads clearer? Otherwise drop a DM but please keep in mind we have a 500 char limit and dopn't want to rewrite the whole post :)

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Delta Chat @delta.chat · 02/05/2026

We’ve been busy building and releasing but it’s high time to share some major news: @sovtechfund is investing nearly €500K into #chatmail This 18-month commitment supports chatmail maintainers keeping the core infrastructure secure and evolving, which is the backbone for: #DeltaChat […]

Original post on chaos.social

Reposted by Delta Chat

pancake :radare2: @pancake.infosec.exchange.ap.brid.gy · 30/04/2026

Parla is no longer depending on DeltachatDesktop to work, it's now able to create, transfer profiles and relays by itself. Looking forward distros to help me draw the best way to ship a separate jsonrpc server, maybe even sandboxed separately from the UI app […] [Original post on infosec.exchange]

Delta Chat @delta.chat · 25/04/2026

"it's always the receiver that determines the meaning of a message" is a famous opening quote at the first symposium on self organizing systems in Chicago, 1959. This and many other findings from those circles re-appear in our day to day discussions. We are doing next steps towards automating […]

Original post on chaos.social

Delta Chat @delta.chat · 23/04/2026

Making sure that deleted messages are actually deleted and unrecoverable is more involved than most folks think. The FBI could recently recover deleted Signal messages from an iOS phone because the notifications you see on your phone were stored in an extra database. Apple has now fixed this […]

Original post on chaos.social

Delta Chat @delta.chat · 22/04/2026

#deltachat user profiles are private and invisible to the public. No one can discover you, or your children, via phone numbers or any other public handle. Chat profiles exist only on user devices. No PIN and no "SMS verification code" ever asked or needed. The lack of "public discovery" also […]

Original post on chaos.social

Delta Chat @delta.chat · 21/04/2026

This morning nine.testrun.org was briefly unavailable, some network problem. A good time to remind everyone to add a second relay to your #deltachat app: 1. Go to chatmail.at/relays randomly choose one of the listed relay pages and copy the invitation code to your clipboard 2. In delta […]

Original post on chaos.social

Delta Chat @delta.chat · 18/04/2026

"Popularity is overrated" is an often occuring phrase in our circles. Which is of course nonsense because only what is popular, counts, right? Only what everybody else does is a valid choice, right? #deltachat #chatmail and #webxdc are used in private places and […] [Original post on chaos.social]

Photo of a beautiful park in the black forest where a few of us are gathering to discuss the various authoritarian tendencies in platforms, countries, infrastructures and minds ... And plotting our next steps on a beautiful sunny day with lots of green grass, violet flowery trees and shadows in the sun

Delta Chat @delta.chat · 13/04/2026

Apart from the new #Gnome effort, there also is an interesting experiment of a #Rust terminal-client with #Ratatui -- for others to start from should they feel they need some enjoyable distraction :) git.sakamoto.pl/j-g00da/deltarat-ex… #Chatmail clients typically use the Rust […]

Original post on chaos.social

Reposted by Delta Chat

pancake :radare2: @pancake.infosec.exchange.ap.brid.gy · 12/04/2026

Here we go! The first release of my native Delta Chat client for GNOME is out! github.com/trufae/deltachat-gnome/r… cc @delta @gnome i'm using it in daily basis, and it's quite stable right now, but still lacks many features from the […] [Original post on infosec.exchange]

Delta Chat @delta.chat · 11/04/2026

the public #chatmail relay list chatmail.at/relay covers about ~20% or so of chat relays we heart about and have traces or hints from, and we definitely don't see everything -- which is how it should be :)

Delta Chat @delta.chat · 11/04/2026

What if all public funding and all private donations to our efforts stop tomorrow? Users should be fine for years thanks to the wonderful world-wide community of #chatmail relay operators 💜 Relays are dirt cheap to run. Also, our developments are much cheaper and less complex compared to what […]

Original post on chaos.social

Delta Chat @delta.chat · 09/04/2026

RE: chaos.social/@delta/115866917974514… Do you want to live in a world where private digital communication is not possible anymore? That's a growing reality for many people world-wide. Private communication is extremely important to salvage into the digital realm and it's not just […]

Original post on chaos.social

Delta Chat @delta.chat · 09/04/2026

#deltachat contributors range from age 16 to 65, spanning diverse genders and even more countries and cultures. We have many discussions, and also conflicts but we usually don't carry those out in big public groups but rather go for 1:1s and generally small-group discussions. There is no central […]

Original post on chaos.social

Delta Chat @delta.chat · 02/04/2026

Under the hood, we are using IETF Internet Messaging specifications commonly tagged as "email". Sounds old, right? Actually there is a lot of new stuff going on! For example, #chatmail apps now fully support: - RFC9788 ("Header Protection") to achieve minimal metadata - RFC9580 ("OpenPGP") to […]

Original post on chaos.social

Delta Chat @delta.chat · 01/04/2026

@chiefbongo and no worries, contact discovery is more or less a no-go area, even though it is lightly discussed sometimes, but certainly not via a centralized server, let alone one that we would run.

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Delta Chat @delta.chat · 01/04/2026

@chiefbongo yes, calls are end-to-end encrypted. Sorry for not making this more explicit. We also still have work to do to update docs and get everything stabilized 😅

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Delta Chat @delta.chat · 31/03/2026

@jaseg in the very first sentence we try to clarify the scope, i.e. "With the latest 2.48+ releases, a chat message reveals close to zero metadata to servers." The key phrase here is "to servers", and we then detail all the data that was made invisible to the server. If you want to discuss this […]

Original post on chaos.social

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Delta Chat @delta.chat · 31/03/2026

@jaseg yes, it's about message header metadata, and the fact that no cryptographic identities are visible on the transport layer, making it hard for hostile servers to track anything when users change relays. This blog post is not a security whitepaper, which we admittedly still need to update […]

Original post on chaos.social

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Delta Chat @delta.chat · 31/03/2026

After three intense months of work from more than a dozen contributors, #deltachat 2.48 releases are rolling. Maybe the most feature-packed releases ever? - "zero metadata" messaging - native Audio/Video calls on Android and iOS, as well as UbuntuTouch - Group and Channel descriptions - A […]

Original post on chaos.social

Delta Chat @delta.chat · 26/03/2026

RE: pouet.chapril.org/@agenda_du_libre/… swiss news: a new chatmail relay chatsecure.ch ... hosted in denmark, however :) also there is an upocoming event in Môtiers in two days. And there was a podcast featuring delta chat last year […]

Original post on chaos.social