can I ask you a random but very related question?

I have a Lenovo that I want to upgrade to Linux & can't get into the BIOS. What F-key should I use on startup?

If you need some more info, I can hit you up on #DeltaChat

Dear @Tutanota would it be technically possible for you accept the setting for #deltachat ?

Thanks in advance.

While #chatcontrol poses an existential threat to the Freiburg merlinux GmbH and distributing #deltachat apps from within the EU to all stores worldwide, it would resist any chatcontrol legislation up to the German constitutional and EuGH courts.

If the EU based company would need to fold in a few years, there would likely be forks distributed outside the EU that will *seamlessly* continue to function. Our architecture and FOSS licensing makes sure of it. See also chaos.social/@delta/1134177407…

Delta Chat

2024-11-03 07:03:02

Preventing enshittificatiom with the "Ulysses pact" from @pluralistic pluralistic.net/2024/11/02/uly…

We consider our efforts aligned: #deltachat #chatmail and #webxdc implement "right to exit" on all levels of our decentralized messaging project.

- deploy your own servers permission free and interoperable with all e-mail servers ("federation mast")
- all apps and libraries and server components are 100% Foss
- interactive chat-shared web-apps can be used in other messengers

#righttoexit

Pluralistic: Bluesky and enshittification (02 Nov 2024) – Pluralistic: Daily links from Cory Doctorow

^{pluralistic.net}

Woah! Only now did we discover a great blog post from @wq who discusses the progression from hosting a #Matrix , a #Snikket and a #SimpleX server, to now running a #chatmail relay runtimeterror.dev/self-hosted-…

It's an excellent read, with lots of good advise, including having a public "hello" profile and another unpublished chat profile for private chatting. #deltachat apps have pervasive multi-profile support (and multi-device support) so it's pretty easy to establish such a two-profile setup.

V2 #deltachat is rolling out after weeks of internal testing, a major milestone revising how end-to-end encryption works and bringing more beautiful contact and group profiles, direct access to chat-shared apps in the title bar and a "new email" action with setting a subject for those using a classic server.

Best of all, users and developers don't need to co-ordinate anything for upgrading to V2 despite the massive security rework behind the scenes :)

delta.chat/en/2025-08-04-encry…

Delta Chat: Delta Chat V2: a major security upgrade, beautified contact profiles, new email action and direct app access in chats

With Delta Chat Version 2, chats are end-to-end encrypted, always and by default. Previously it was possible that chats without green checkmarks could contain messages without end-to-end encryption...

^delta.chat

head-ups #DeltaChat users! Want to help us testing the upcoming Delta Chat 2.X release? read here:

support.delta.chat/t/android-h…

Android: Help testing upcoming Delta Chat 2.6.0 release!

Want to help us testing the upcoming Delta Chat 2.6.0 release for Android? Choose your flavor and mind your backups: 🍋 https://download.delta.chat/android/beta/deltachat-gplay-release-2.6.0.

^Delta.Chat

Telegram - because i love the pure black theme.

#Deltachat is totally bright even with the dark one.

• Telegram (30%, 128 votes)
• WhatsApp (5%, 21 votes)
• Signal (58%, 243 votes)
• Threema (6%, 27 votes)

Hey folks. I've noticed #DeltaChat hasn't got a page in #Wikipedia. Do you know sources which would prove its notability so we could create a page for it?

Boosts appreciated. If you don't know sources, someone else might.

#AskFedi #Email #IM #Messenger #chatmail #chatmailrelay #FOSS #opensource #tech #technology #software

Two of our teams just gave talks at the @passthesaltcon 2025 conference in Lille:

@Xeniax tells the story of "federated messaging" waves and her usable security research, emphasizing "availability" as a key issue
passthesalt.ubicast.tv/videos/… --

@hpk starts off with prioritizing usable security and walks through #chatmail transport layer security goals and #deltachat end-point security status, upcoming releases and prospective work on improving metadata and other goals
passthesalt.ubicast.tv/videos/…

Hice un vídeo para que puedas enviárselo a tus personas cercanas, explicando lo fácil que es dejar #WhatsApp, y por qué es importante hacerlo. 💬

fediverse.tv/w/35Lvufq1XW8ZVBT… (@ivangj@fediverse.tv)
También disponible en YouTube por si quieres evitar rozamientos 😅.

#SoftwareLibre #PeerTube #Chat #Signal #XMPP #DeltaChat #Matrix

Today at DIFF in Freiburg: DeltaTouch running on PostmarketOS on a Steam Deck (with a Win7 theme), owned by @ell1e

#DeltaTouch #DeltaChat #postmarketOS

#deltachat is secure against server-side group membership changes but for a very different reason than #signal which keeps encrypted group membership data in a central store.

Delta Chat has _no_ central store but implements a rigidly tested #p2p group membership model where servers play no role github.com/chatmail/models/tre…

Both signal and delta chat are safe against recently published attacks against #whatsapp that can add members to chats, breaking end to end encryption. arstechnica.com/security/2025/…

WhatsApp provides no cryptographic management for group messages

The weakness creates the possibility of an insider or hacker adding rogue members.

^{Dan Goodin (Ars Technica)}

@Winter blue tardis🇧🇬🇭🇺 @Jayson Smith @Nick Giannak III If you are still testing deltachat, I managed to run my #chatmail relay and it's working for a few weeks for me.
I have created a groupchat where I'd like to invite other screen reader users.
As I have posted a few times recently, #deltachat people do really care about screen reader #a11y so while testing and something is not working the way you would expect lets describe it in details, and report it properly.

Here's the link to that group chat I'm talking about
i.delta.chat/#6FE1642916908F1A…

Comparing #XMPP against #email protocols is too limited. What sets #deltachat apart is *vertical integration* and being driven by UI/UX considerations. Cross-platform Apps and Bots use the Rust core library which connects with #chatmail relays and classic email servers based on a higher level API -- abstracting over SMTP, MIME, #OpenPGP etc. See chatmail.at

#webxdc apps in turn use an even higher level stable API abstracting over email/xmpp/... see webxdc.org/docs/

Chatmail

Chatmail provides FOSS infrastructure for interoperable, secure, speedy and reliable end-to-end encrypted messaging. Check out clients as Arcane Chat, Bots or Delta Chat today!

^chatmail.at

our friends over at @rpgp just published a monster milestone, humbly tagged 0.16 😍 with

- streaming decryption and encryption

- post-quantum-cryptography

- API streamlining.

#rPGP is a full Rust implementation of #openpgp which counts among the fastest and most compliant implementations today, and includes security audits. Note: #deltachat uses a restricted subset of OpenPGP, and follows best practices (eg using the same ed25519 keys implementation as #signal) github.com/rpgp/rpgp/

GitHub - rpgp/rpgp: OpenPGP implemented in pure Rust, permissively licensed

OpenPGP implemented in pure Rust, permissively licensed - rpgp/rpgp

^GitHub

1 cent per five years .... is the current marginal hosting cost for a #chatmail address, with which #deltachat apps facilitate world-wide private messaging including interactive #webxdc apps that run end-to-end encrypted in any chat group.

<1 Million EUR per year is the estimated marginal hosting costs for 350 Million EU citizens. Such scaling requires, however, research and development, including careful UX and #cryptography work. Related writing from @gordon

newsletter.squishy.computer/p/…

The trajectory of E2E-encryption is about de-platforming: There shall be no central machines that can control the edges/peers, and the social groups and virtual centers they freely form.

Our #deltachat R&D around #chatmail relays and #webxdc apps all aim to realize such a "zero-platforms" fully E2E-encrypted interaction model. However, this is *not* just about cryptographic cleverness. Rather it is about usable anti-authoritarian designs, as explicitly stated in January delta.chat/en/2025-01-23-webxd…

Delta Chat: Replacing billionairish platforms with ZIP files

How can we evolve and deploy web apps without allowing developers or operators to become a “billionaire in the middle”? There are many ways to try to address this challenge and some involve the tec...

^delta.chat

I said it before on Mastodon. I'm reposting this again. Comparing #DeltaChat and #Matrix together, if you want hassle free and consistent messenger for private #E2EE chats, don't go for Matrix. DeltaChat is way better.

However, if you want something like a public forum, or a public chatroom, don't go for DeltaChat. Matrix is way better suited for that. And DeltaChat does not support public groups at all. In DeltaChat groups, there is no admin or moderator and everyone have got permission to remove or add the others.

I think I have to write a longer post on my personal blog about these two, comparing them together.

PS: Another Matrix encryption bug few minutes ago triggered repost of this.

#Element #IM #Messenger #Email #FOSS #opensource #freesoftware #free_software #decentralization #decentralized

Dear fans of messenger comparison sports,

How does it factor in that on #deltachat there are many apps that can be used in a chat without requiring a login or even a privacy policy ... And the apps all work like cryptpad but automatically and without requiring any server side hosting?

Editing documents and checklists and calendars are all safely end-to-end encrypted without a server and anyone can write new #webxdc apps permission free.

Which other cross-platform messenger offers this?

streamed yesterday: one-hour german #chaosradio @cccfr freiburg feature at @RDL with a deep-dive conversation about #deltachat origins, what it has and hasn't to do with e-mail, protection against server compromise, phone based compared to e-mail networking, how to conspire for baking cheese cakes, authoritarianism and sovereignty, protest and organization, how to arrange for shopping and checklists in chats ... and fun music :)

rdl.de/beitrag/chaosradio-frei…

rdl.de/sites/default/files/aud…

Chaosradio Freiburg 0xAC

Termine28.2.

^{Radio Dreyeckland}

Sensitive content Reveal/hide

So I just read the latest #DeltaChat article: blog.feld.me/posts/2025/03/del…

Can we please stop with #XMPP's supposed "very" fragmentation? That's the kind of cheap shots that annoy me. Just like summoning the almighty gtalk that doomed us all.

First, is it that bad? (myeah? "It depends")

And second, you're bound to hit some level of fragmentation as long as your policy is to allow various independent implementations on the network. IMO the *only* reason you're not fragmented *yet* is because you provide a single implementation across platforms.

#XMPP also has some of these, the first example that comes to mind being #Snikket (snikket.org).

Snikket Chat

Snikket is a simple, secure and private messaging app

^{Snikket Chat}

I wrote a #DeltaChat blog post for technical users who are skeptical about how it works

Everything You Think You Know About DeltaChat Is Wrong

blog.feld.me/posts/2025/03/del…

@delta

DeltaTouch 1.12.0 is out, highlights:

🔹 Sync deletion of messages and chats across devices
🔸 Page sized text editor for longer messages
🔹 Webxdc: Notifications (and more)
🔸 Improved integration into UT (ContentHub import/share)

Also included: Preparation for the long-awaited feature teased by @delta 😇
chaos.social/@delta/1141265297…

Full changelog: codeberg.org/lk108/deltatouch/…

Webxdc support in DeltaTouch is generously funded by @nlnet / @NGIZero, thanks!

#DeltaTouch #DeltaChat #Webxdc #UbuntuTouch

Delta Chat (@delta@chaos.social)

Attached: 1 image Release cycle completed. Please update so we can initiate the next release round with a long awaited feature ;) Generally delta apps are compatible to all currently released apps and because 15+ app stores come with all kinds of …

^chaos.social

The downside of our project approach was that we often got experts being very dismissive on re-using email and #OpenPGP ... and there still is some opposition which often subsides when actually trying #deltachat and #chatmail, looking at security audits and our strong usable security focus.

There may also be surprising upsides. The UK "Online Safety Bill" which attacks end-to-end encryption integrity seems to not apply for ... e-mail. Because everyone knows, e-mail is unencrypted, right? :)

Decentralizers, attention! :)

Last #deltachat releases introduced stable #p2p group membership not found in any other messenger. Members can add/remove peers also while being offline, and when everything comes online again, everyone has the same consistent membership view. We formalized and ran a simulation model using #TLA+ (invented by Leslie Lamport of vector clock fame):

github.com/chatmail/models/tre…

and a complementary #pytest model with more corner cases tested here:

github.com/chatmail/models/blo…

models/gmc/test_gmc.py at main · chatmail/models

Formal specifications for chatmail. Contribute to chatmail/models development by creating an account on GitHub.

^GitHub

With #deltachat #chatmail and #webxdc developments we aim to instigate a new modern foundation for secure E-Mail and a resilient Web without platforms. We are building a kind of #minecraft system for modern decentralized messaging.

But who are we building it for?

For all who need reliable trustable means of modern private communication.

While our work needs hackers and experts it's not designed for them. @tante raises interesting and important related thoughts tante.cc/2025/03/03/who-is-fre…

Who is Free Software for?

For a while I have been arguing that maybe there are some issues with the whole “Open*” movements, their founding myths and ideologies (see for example my talk at Fluconf). This criticism comes from a place of love.

^{tante (Smashing Frames)}

@maple #ArcaneChat is an android client for #DeltaChat, and Delta Chat is available for #iOS, #Windows, #Linux etc.

and now that you talk about young people, in several places people are not even allowed to get a SIM card at all until certain age, so apps like Signal that depend on phone numbers are a non-go, while I have seen several people using DeltaChat with their children, ex:

mastodon.ie/@davidbenque/11403…

@bert_hubert

I really recommend you to give a try to #DeltaChat anonymous login without any phone number or any private data required, you can create as many accounts and add as many devices as you want, all work smoothly no encryption problems with multi-device etc and it has a better interface than #matrix on the level of #WhatsApp and #Telegram super user-friendly and painless to onboard family and friends

And you LITERALLY own your data and can browse it and search it offline

@spla +1 for Deltachat. Requires an auto-crypt-compatible email address. @Tutanota , would you please add #deltachat compatible auto-crypt goodness to your offerings?

PS: I have tuta, proton, and posteo.net email addresses (and thanks for the free service!). I pay for, and favor the posteo.net one the most. Why? Because of the auto-crypt support. (BTW: I am not paid in any way to endorse one over the other.)