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go-chasquid-smtp/docs/dovecot.md
Alberto Bertogli d39d3aaff4 chasquid: Dovecot support (experimental)
This patch adds dovecot support to the chasquid daemon, using the
internal dovecot library added in previous patches.

Dovecot support is still considered EXPERIMENTAL and may be reverted, or
changed in backwards-incompatible ways.

The patch also adds the corresponding integration test, which brings up
a dovecot server with a custom configuration, and tests chasquid's
authentication against it.  If dovecot is not installed, the test is
skipped.
2018-02-10 23:18:31 +00:00

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# Dovecot integration
As of version 0.04 (2018-02), [chasquid] has _experimental_ integration with
[dovecot] for authenticating users.
This means that chasquid can ask dovecot to authenticate users, instead/in
addition to having its own per-domain user databases.
It is experimental because it was added recently, and the semantics and
options are prone to be changed in the future. If you use this feature, please
let the authors know, at chasquid@googlegroups.com.
## Configuring dovecot
The following needs to be added to the Dovecot configuration, usually in
`/etc/dovecot/conf.d/10-master.conf`:
```
service auth {
unix_listener auth-chasquid-userdb {
mode = 0660
user = chasquid
}
unix_listener auth-chasquid-client {
mode = 0660
user = chasquid
}
}
```
If chasquid is running under a different user, adjust the `user = ` lines
accordingly.
This lets chasquid issue authentication requests to dovecot.
## Configuring chasquid
Add the following line to `/etc/chasquid/chasquid.conf`:
```
dovecot_auth: true
```
That should be it, because chasquid will "autodetect" the full path to the
dovecot sockets, by looking in the usual places (tested in Debian, Ubuntu, and
CentOS).
If chasquid can't find them, the paths can be set with the
`dovecot_userdb_path` and `dovecot_client_path` options.
[dovecot]: https://dovecot.org
[chasquid]: https://blitiri.com.ar/p/chasquid