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# Mail And Radicale
This repo currently configures mail for `billenius.com` on `Hermes`.
## Hosts
- Mail server: `mail.billenius.com`
- Thunderbird autoconfig: `autoconfig.billenius.com`
- Outlook-style autodiscover: `autodiscover.billenius.com`
- CalDAV/CardDAV via Radicale: `cal.billenius.com`
- Apple configuration profile: `https://autoconfig.billenius.com/mobileconfig/?emailaddress=love%40billenius.com`
- Webmail via Roundcube: `https://mail.billenius.com`
## Repo Locations
- Core mail settings: `modules/nixos/mail-server/mail.nix`
- Mail autodiscovery XML: `modules/nixos/mail-server/autodiscover.nix`
- Radicale and DAV discovery: `modules/nixos/mail-server/radicale.nix`
- Roundcube: `modules/nixos/mail-server/roundcube.nix`
## What The Repo Configures
### Mail
- IMAP over SSL on `mail.billenius.com:993`
- SMTP submission with STARTTLS on `mail.billenius.com:587`
- Webmail on `https://mail.billenius.com`
- ACME certificates for the mail-related nginx hosts
### Autodiscovery
- Thunderbird mail config at `https://autoconfig.billenius.com/mail/config-v1.1.xml`
- Outlook-style mail config at `https://autodiscover.billenius.com/autodiscover/autodiscover.xml`
- Thunderbird XML also advertises:
- CardDAV: `https://cal.billenius.com/`
- CalDAV: `https://cal.billenius.com/`
### Radicale
- Radicale is reverse proxied on `https://cal.billenius.com/`
- Authentication uses the same mail accounts and password hashes as the mail server
- DAV discovery redirects are served on:
- `https://mail.billenius.com/.well-known/caldav`
- `https://mail.billenius.com/.well-known/carddav`
- `https://cal.billenius.com/.well-known/caldav`
- `https://cal.billenius.com/.well-known/carddav`
This repo does not manage the apex website host for `billenius.com`. If the public website should also expose DAV redirects on `/.well-known/caldav` and `/.well-known/carddav`, that has to be configured on the separate nginx host serving `billenius.com`.
### Apple Mobileconfig
- The canonical Apple profile entrypoint is:
- `https://autoconfig.billenius.com/mobileconfig/?emailaddress=<url-encoded-email>`
- Apple profiles are hosted from `autoconfig.billenius.com`
- A small landing page is available at:
- `https://autoconfig.billenius.com/mobileconfig/`
- Account-specific profiles are always available at:
- `https://autoconfig.billenius.com/mobileconfig/<sanitized-email>.mobileconfig`
- If there is exactly one configured mail account, the profile is also available at:
- `https://autoconfig.billenius.com/mobileconfig/billenius.mobileconfig`
The profile configures:
- IMAP on `mail.billenius.com:993`
- SMTP submission on `mail.billenius.com:587`
- CalDAV on `cal.billenius.com:443`
- CardDAV on `cal.billenius.com:443`
Passwords are not embedded in the profile.
## DNS
These records are expected for good client discovery.
### Host Records
- `mail.billenius.com`
- `cal.billenius.com`
- `autoconfig.billenius.com`
- `autodiscover.billenius.com`
`cal.billenius.com`, `autoconfig.billenius.com`, and `autodiscover.billenius.com` can point at the same host as `mail.billenius.com`.
### Mail SRV
```dns
_imaps._tcp.billenius.com. SRV 0 0 993 mail.billenius.com.
_submission._tcp.billenius.com. SRV 0 0 587 mail.billenius.com.
```
### DAV SRV/TXT
```dns
_caldavs._tcp.billenius.com. SRV 0 0 443 cal.billenius.com.
_carddavs._tcp.billenius.com. SRV 0 0 443 cal.billenius.com.
_caldavs._tcp.billenius.com. TXT "path=/"
_carddavs._tcp.billenius.com. TXT "path=/"
```
## iOS Setup
The preferred setup path on Apple devices is to open the hosted profile in Safari:
```text
https://autoconfig.billenius.com/mobileconfig/?emailaddress=love%40billenius.com
```
Install the profile, then enter the password when prompted.
The manual steps below are the fallback path.
### Mail
iOS does not reliably do full self-hosted IMAP setup from the same discovery flow that Thunderbird uses. The hosted `.mobileconfig` profile is the best path for one-step Apple setup.
1. Open `Settings`
2. Go to `Apps` -> `Mail` -> `Mail Accounts` -> `Add Account`
3. Choose `Other`
4. Choose `Add Mail Account`
5. Use:
- Email: full mail address, for example `love@billenius.com`
- Incoming host: `mail.billenius.com`
- Outgoing host: `mail.billenius.com`
- Username: full mail address
- Password: the mail password
6. iOS should use:
- IMAP SSL on `993`
- SMTP submission on `587`
### Calendar
1. Open `Settings`
2. Go to `Apps` -> `Calendar` -> `Calendar Accounts` -> `Add Account`
3. Choose `Other`
4. Choose `Add CalDAV Account`
5. Use:
- Server: `cal.billenius.com`
- Username: full mail address
- Password: the mail password
### Contacts
1. Open `Settings`
2. Go to `Apps` -> `Contacts` -> `Contacts Accounts` -> `Add Account`
3. Choose `Other`
4. Choose `Add CardDAV Account`
5. Use:
- Server: `cal.billenius.com`
- Username: full mail address
- Password: the mail password
If the goal is a single Apple setup flow that provisions mail, calendars, and contacts together, use the hosted `.mobileconfig` profile on `autoconfig.billenius.com` instead of adding the accounts manually.
## Thunderbird Setup
### Mail
Thunderbird should discover mail automatically from the email address alone.
1. Open Thunderbird
2. Add a new mail account
3. Enter the email address and password
4. Thunderbird should pick up `mail.billenius.com` from `autoconfig.billenius.com`
### Contacts
Thunderbird's mail account wizard does not reliably attach CardDAV address books automatically, even when the XML, SRV/TXT records, and `/.well-known` endpoints exist.
The reliable path is:
1. Open `Address Book`
2. Choose `New Address Book` -> `Add CardDAV Address Book`
3. Use:
- Username: full mail address
- Location: `https://cal.billenius.com/`
4. Authenticate
5. Select the discovered address books
### Calendars
The reliable path is:
1. Open `Calendar`
2. Choose `New Calendar`
3. Choose `On the Network`
4. Use:
- Username: full mail address
- Location: `https://cal.billenius.com/`
5. Choose `Find Calendars`
6. Subscribe to the discovered calendars
## Verification
### Thunderbird XML
```bash
curl https://autoconfig.billenius.com/mail/config-v1.1.xml
curl https://autodiscover.billenius.com/autodiscover/autodiscover.xml
```
### DAV Well-Known
```bash
curl -I https://mail.billenius.com/.well-known/caldav
curl -I https://mail.billenius.com/.well-known/carddav
curl -I https://cal.billenius.com/.well-known/caldav
curl -I https://cal.billenius.com/.well-known/carddav
```
Each should return a `301` redirect to `https://cal.billenius.com/`.
### DNS
```bash
dig +short SRV _imaps._tcp.billenius.com
dig +short SRV _submission._tcp.billenius.com
dig +short SRV _caldavs._tcp.billenius.com
dig +short SRV _carddavs._tcp.billenius.com
dig +short TXT _caldavs._tcp.billenius.com
dig +short TXT _carddavs._tcp.billenius.com
```
## Current Limitation
The standards-based discovery in this repo is good enough for:
- Thunderbird mail autodiscovery
- DAV discovery for many clients
- manual but short setup flows on iOS and Thunderbird
It is not enough to guarantee that:
- Thunderbird's mail wizard will also attach calendars and contacts automatically
- iOS will provision mail, contacts, and calendars in one combined login flow
For that, the next likely improvement is an Apple `mobileconfig` profile and, if needed, client-specific setup documentation.