159 lines
4.3 KiB
Markdown
159 lines
4.3 KiB
Markdown
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<img width="800px" src="www/src/collage-top.png"/>
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# Chatmail services optimized for Delta Chat apps
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This repository helps to setup a ready-to-use chatmail server
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comprised of a minimal setup of the battle-tested
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[postfix smtp](https://www.postfix.org) and [dovecot imap](https://www.dovecot.org) services.
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The setup is designed and optimized for providing chatmail accounts
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for use by [Delta Chat apps](https://delta.chat).
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Chatmail accounts are automatically created by a first login,
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after which the initially specified password is required for using them.
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## Deploying your own chatmail server
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We subsequently use `CHATMAIL_DOMAIN` as a placeholder for your fully qualified
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DNS domain name (FQDN), for example `chat.example.org`.
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1. Install the `cmdeploy` command in a virtualenv
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```
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git clone https://github.com/deltachat/chatmail
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cd chatmail
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scripts/initenv.sh
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```
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2. Create chatmail configuration file `chatmail.ini`:
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```
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scripts/cmdeploy init CHATMAIL_DOMAIN
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```
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3. Setup first DNS records for your `CHATMAIL_DOMAIN`,
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according to the hints provided by `cmdeploy init`.
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Verify that SSH root login works:
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```
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ssh root@CHATMAIL_DOMAIN
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```
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4. Deploy to the remote chatmail server:
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```
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scripts/cmdeploy run
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```
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5. To output a DNS zone file from which you can transfer DNS records
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to your DNS provider:
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```
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scripts/cmdeploy dns
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```
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### Other helpful commands:
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To check the status of your remotely running chatmail service:
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```
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scripts/cmdeploy status
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```
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To test whether your chatmail service is working correctly:
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```
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scripts/cmdeploy test
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```
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To measure the performance of your chatmail service:
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```
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scripts/cmdeploy bench
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```
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## Overview of this repository
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This repository drives the development of "chatmail instances",
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comprised of minimal setups of
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- [postfix smtp server](https://www.postfix.org)
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- [dovecot imap server](https://www.dovecot.org)
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as well as custom services that are integrated with these two:
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- `chatmaild/src/chatmaild/doveauth.py` implements
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create-on-login account creation semantics and is used
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by Dovecot during login authentication and by Postfix
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which in turn uses [Dovecot SASL](https://doc.dovecot.org/configuration_manual/authentication/dict/#complete-example-for-authenticating-via-a-unix-socket)
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to authenticate users
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to send mails for them.
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- `chatmaild/src/chatmaild/filtermail.py` prevents
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unencrypted e-mail from leaving the chatmail instance
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and is integrated into postfix's outbound mail pipelines.
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There is also the `cmdeploy/src/cmdeploy/cmdeploy.py` command line tool
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which helps with setting up and managing the chatmail service.
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`cmdeploy run` uses [pyinfra-based scripting](https://pyinfra.com/)
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in `cmdeploy/src/cmdeploy/__init__.py`
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to automatically install all chatmail components on a server.
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### Home page and getting started for users
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`cmdeploy run` also creates default static Web pages and deploys them
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to an nginx web server under `https://CHATMAIL_DOMAIN`.
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- a default `index.html` along with a QR code that users can click to
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create accounts on your chatmail provider,
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- a default `info.html` that is linked from the home page,
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- a default `policy.html` that is linked from the home page.
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All `.html` files are generated
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by the according markdown `.md` file in the `www/src` directory.
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### Refining the web pages
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```
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scripts/cmdeploy webdev
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```
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This starts a local live development cycle for chatmail Web pages:
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- uses the `www/src/page-layout.html` file for producing static
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HTML pages from `www/src/*.md` files
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- continously builds the web presence reading files from `www/src` directory
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and generating html files and copying assets to the `www/build` directory.
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- Starts a browser window automatically where you can "refresh" as needed.
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## Emergency Commands to disable automatic account creation
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If you need to stop account creation,
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e.g. because some script is wildly creating accounts,
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login to the server with ssh and run:
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```
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touch /etc/chatmail-nocreate
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```
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While this file is present, account creation will be blocked.
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### Ports
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Postfix listens on ports 25 (smtp) and 587 (submission) and 465 (submissions).
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Dovecot listens on ports 143(imap) and 993 (imaps).
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Delta Chat apps will, however, discover all ports and configurations
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automatically by reading the `autoconfig.xml` file from the chatmail service.
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