Our server supports XEP-0313: Message Archive Management.
This is disabled by default as we are very strict on what data we save. If you like to enable it for your account, here’s two examples, Gajim (Windows and Linux, the screenshots are taken from the Windows version) and Conversations (Android). All screenshots are German, sorry about that. If you are willing to offer English screenshots, don’t hesitate, contact us. 😉