egroupware/doc/REST-CalDAV-CardDAV/Mail.md

# EGroupware REST API for Mail

Authentication is via Basic Auth with username and a password, or a token valid for:
- either just the given user or all users
- CalDAV/CardDAV Sync (REST API)
- E-Mail application

> Currently only implemented is sending mail or launching interactive compose windows.

Implemented requests (relative to https://example.org/egroupware/groupdav.php)

- ```GET /mail``` get different mail accounts available to user
<details>
  <summary>Example: Querying available identities / signatures</summary>

```bash
curl -i https://example.org/egroupware/groupdav.php/mail --user <user> -H 'Accept: application/json'
HTTP/1.1 200 OK
Content-Type: application/json

{
        "responses": {
"/ralf/mail/1": "Ralf Becker boulder.egroupware.org <ralf@boulder.egroupware.org>",
"/ralf/mail/52": "Ralf Becker  <sysop@testbox.egroupware.org>",
"/ralf/mail/85": "Ralf Becker  <RalfBeckerKL@gmail.com>"
        }
}
```
</details>

- ```POST /mail[/<id>]``` send mail for default or given identity <id>
<details>
  <summary>Example: Sending mail</summary>

The content of the POST request is a JSON encoded object with following attributes
- ```to```: array of strings with (RFC882) email addresses like ```["info@egroupware.org", "Ralf Becker <rb@egroupware.org"]```
- ```cc```: array of strings with (RFC882) email addresses (optional)
- ```bcc```: array of strings with (RFC882) email addresses (optional)
- ```replyto```: string with (RFC822) email address (optional)
- ```subject```: string with subject
- ```body```: string plain text body (optional)
- ```bodyHtml```: string with html body (optional)
- ```attachments```: array of strings returned from uploaded attachments (see below) or VFS path ```["/mail/attachments/<token>", "/home/<user>/<filename>", ...]```
- ```attachmentType```: one of the following strings (optional, default "attach")
  - "attach" send as attachment
  - "link" send as sharing link
  - "share_ro" send a readonly share using the current file content (VFS only)
  - "share_rw" send as writable share (VFS and EPL only)
- ```shareExpiration```: "yyyy-mm-dd" or e.g. "+2days", default not accessed in 100 days (EPL only)
- ```sharePassword```: string with password required to access share, default none (EPL only)
- ```folder```: folder to store send mail, default Sent folder
- ```priority```: 1: high, 3: normal (default), 5: low

```
curl -i https://example.org/egroupware/groupdav.php/mail --user <user> \
  -X POST -H 'Content-Type: application/json' \
  --data-binary '{"to":["info@egroupware.org"],"subject":"Testmail","body":"This is a test :)\n\nRegards"}'
HTTP/1.1 200 Ok
Content-Type: application/json

{
  "status": 200,
  "message": "Mail successful sent"
}
```
If you are not authenticated you will get:
```
HTTP/1.1 401 Unauthorized
WWW-Authenticate: Basic realm="EGroupware CalDAV/CardDAV/GroupDAV server"
X-WebDAV-Status: 401 Unauthorized
```
If you use a token to authenticate, SMTP must work without password, or you need an SMTP-only account!
It's probably still not possible to save a successful sent mail to the Sent folder:
```
{
    "status": 200,
    "warning": "Mail NOT saved to Sent folder, as no user password",
    "message": "Mail successful sent"
}
```
If there is an error sending the mail you will get:
```
HTTP/1.1 500 Internal Server Error
Content-Type: application/json

{"error": 500,"message":"SMTP Server not reachable"}
```
</details>

- ```POST /mail[/<id>]/compose``` launch compose window
<details>
  <summary>Example: Opening a compose window</summary>

Parameters are identical to send mail request above, thought there are additional responses:
- compose window successful opened
```
HTTP/1.1 200 OK
Content-Type: application/json

{
    "status": 200,
    "message": "Request to open compose window sent"
}
```
- user is not online, therefore compose window can NOT be opened
```
404 Not found
Content-Type: application/json

{
    "error": 404,
    "message": "User 'ralf' (#5) is NOT online"
}
```
</details>

- ```POST /mail/attachments/<filename>``` upload mail attachments
<details>
  <summary>Example: Uploading an attachment  to be used for sending or composing mail</summary>

The content of the POST request is the attachment, a Location header in the response gives you a URL 
to use in further requests, instead of the attachment.
  
```
curl -i https://example.org/egroupware/groupdav.php/mail/attachments/<filename> --user <user> \
    --data-binary @<file> -H 'Content-Type: <content-type-of-file>'
HTTP/1.1 302 Found
Location: https://example.org/egroupware/groupdav.php/mail/attachment/<token>

{
    "status": 200,
    "message": "Attachment stored",
    "location": "/mail/attachments/<filename>--xM35lY"
}
```
> When using curl to upload attachments it's important to use ```--data-binary```, just ```-d``` or ```--data``` is NOT sufficient!
</details>

- ```POST /mail[/<id>]/vacation``` enable or disable vacation message or forwarding

<details>
  <summary>Example: Setting a vacation message with given start- and end-date</summary>

The content of the POST request is a JSON encoded object with following attributes
- ```status```: "on" (default, if not start/end), "off" or "by_date" (default, if start/end given)
- ```start```: start-date "YYYY-mm-dd", or e.g. "+2days" (optional)
- ```end```: end-date (last day of vacation) "YYYY-mm-dd" (optional)
- ```text```: vacation notice to the sender (can container $$start$$ and $$end$$ placeholders)
- ```modus```: "notice+store" (default) send vacation notice and store in INBOX, "notice": only send notice, "store": only store
- ```forwards```: array of strings with (RFC882) email addresses (optional, default no forwarding)
- ```addresses```: array of strings with (RFC882) email addresses (optional, default primary email address only)
- ```days```: integer, after how many days should a sender get the vacation message again (optional, otherwise default is used)

> The ```POST``` request is handled like a ```PATCH```, only the given attributes are replaced, use null to unset them.

```
curl -i https://example.org/egroupware/groupdav.php/mail/vacation --user <user> -X POST -H 'Content-Type: application/json' \
  --data-binary '{"text":"I'm away from $$start$$ to $$end$$, will respond when I'm back.","start":"2023-01-01","end":"2023-01-10"}'
    
HTTP/1.1 200 Ok

{
    "status": 200,
    "message": "Vacation handling stored"
}
```
</details>

- ```GET /mail[/<id>]/vacation``` get current vacation message/handling

<details>
  <summary>Example: Querying the current vacation handling</summary>

For an explanation of the returned attributes of the returned object, see the POST request.

```
curl -i https://example.org/egroupware/groupdav.php/mail/vacation --user <user> -H 'Accept: application/json'
    
HTTP/1.1 200 Ok

{
  "start":"2023-01-01",
  "end":"2023-01-10",
  "status": "by_date",
  "modus": "notice+store",
  "text":"I'm away from $$start$$ to $$end$$, will respond when I'm back.",
  "days": 5,
  "addresses": ["me@example.org","webmaster@example.org"],
  "forwards": ["hugo.meyer@example.org","sven@example.com"]
}
```
</details>