Message searching in Dovecot

Hello,

For mobile clients (gmail on Android), I need a server side searching solution.

A few months ago, I tried getting Solr to work with Dovecot, but failed.

The instructions here https://doc.dovecot.org/configuration_manual/fts/solr/ are quite out of date, they reference Debian 8 and 9 (current version 11), and Solr 7.7 (current version 9.2)

My Solr experience is pretty much zero.

Questions/Requests:

• Is there a different tool than Solr I should be using for this?
• Does anyone have a recent version of Solr and Debian working?
• If you do, would you be willing to help me?
• I cannot afford much, this is a home mailserver for my wife and I, but I could pay a small consulting fee.

I use ansible to deploy the server, I'd be willing to contribute the playbooks somewhere for documentation, or help with the docs.

Thanks!

John