add first chatmail landing page

en/chatmail.md

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+---
+title: Chatmail for instant, interoperable and privacy-preserving messaging 
+lang: en
+---
+
+## What are chatmail servers? 
+
+Chatmail servers are optimized for messaging with Delta Chat
+to provide a convenient, privacy-preserving and speedy user experience.
+
+The Delta Chat project operates the default open-signup chatmail server 
+at [nine.testrun.org](https://nine.testrun.org)
+which has been stable since the [December 2023 Chatmail announcement](https://delta.chat/en/2023-12-13-chatmail).  
+
+In addition, there are **community-run chatmail servers - tap to join there instead of nine.testrun.org:**
+
+- [mehl.cloud](https://mehl.cloud) is geared towards german speaking
+  users and has been stable since January 2024. 
+
+- [mailchat.pl](https://mailchat.pl) is geared towards polish speaking
+  users and has been stable since January 2024. 
+
+- [bcc.chat](https://bcc.chat) operates in the US and has been
+  stable since February 2024. 
+
+All chatmail servers are fully and securely interoperable with each other,
+and provide instant notifications to mobile users. 
+
+## How are chatmail servers different from e-mail servers? 
+
+Chatmail servers are minimal e-mail servers designed for speed, security and convenience:
+
+- **Convenience:** Onboard automatically in a few seconds and receive push notifications 
+
+- **Privacy:** No questions asked, no name, numbers or e-mail needed
+
+- **Speed:** Message delivery in well under a second, end-to-end
+
+- **Reliability:** No annoying spam-checking or rate-limits 
+
+- **Security:** Outbound messages are required to be end-to-end encrypted,
+  incoming messages are strictly checked for authenticity. 
+
+## Can i also use a regular e-mail server instead? 
+
+Yes, many users successfully use regular e-mail servers
+especially if they want to handle their regular e-mail communications with Delta Chat. 
+See the [provider database](https://providers.delta.chat) for options. 
+Note that Delta Chat has multi-account support so 
+it's fine to have one account configured with your regular e-mail address,
+and another account for chatting.
+
+## How can i trust any chatmail server? 
+
+Each chatmail server provides additional privacy information on their web page.
+Typically, it only sees encrypted messages and 
+implements automatic, unconditional message deletion after at most 40 days.
+
+Delta Chat provides [guaranteed end-to-end encryption](https://delta.chat/en/2023-11-23-jumbo-42)
+which means that in most use cases, server operators can never read your messages even if they try,
+a guarantee backed up by a recent [security analysis from ETH Zuerich](https://delta.chat/en/2024-03-25-crypto-analysis-securejoin). 
+
+
+## How are chatmail servers run? 
+
+All chatmail servers are automatically deployed and updated using
+[the public chatmail development repository](https://github.com/deltachat/chatmail). 
+Chatmail servers are composed of proven standard e-mail server components,
+[Postfix](https://postfix.org) and [Dovecot](https://dovecot.org),
+and configured to run unattended and to require very low maintenance effort. 
+Chatmail servers happily run on low-end hardware like a Raspberry Pi. 
+
+# How are chatmail servers funded? 
+
+Chatmail servers are designed to be very cheap to run,
+and they are generally self-funded by the operators. 
+Please see the front page of each chatmail server for further information. 
+
+To support chatmail development and the running of the default onboarding server
+you are very welcome to chip in. 
+
+[Donate Money](donate){: .cta-button}