docker-mailserver/docs/content/advanced/full-text-search.md

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## Overview
Full-text search allows all messages to be indexed, so that mail clients can quickly and efficiently search messages by their full text content.
The [dovecot-solr Plugin](https://wiki2.dovecot.org/Plugins/FTS/Solr) is used in conjunction with [Apache Solr](https://lucene.apache.org/solr/) running in a separate container. This is quite straightforward to setup using the following instructions.
## Setup Steps
1. docker-compose.yml:
```
solr:
image: lmmdock/dovecot-solr:latest
volumes:
- solr-dovecot:/opt/solr/server/solr/dovecot
restart: always
mailserver:
image: tvial/docker-mailserver:latest
...
volumes:
...
- ./etc/dovecot/conf.d/10-plugin.conf:/etc/dovecot/conf.d/10-plugin.conf:ro
...
volumes:
solr-dovecot:
driver: local
```
2. `etc/dovecot/conf.d/10-plugin.conf`:
```
mail_plugins = $mail_plugins fts fts_solr
plugin {
fts = solr
fts_autoindex = yes
fts_solr = url=http://solr:8983/solr/dovecot/
}
```
3. Start the solr container: `docker-compose up -d --remove-orphans solr`
4. Restart the mailserver container: `docker-compose restart mailserver`
5. Flag all user mailbox FTS indexes as invalid, so they are rescanned on demand when they are next searched
```
docker-compose exec mailserver doveadm fts rescan -A
```
## Further discussion
See [issue #905](https://github.com/tomav/docker-mailserver/issues/905)