Not having Proton mail integration is a missed opportunity.
Having Lumo summerize my mails from yesterday, or come up with a reply or tell me which mails need an immidiate response would be awesome for productivity

I with co-operation with IBM created V2 prototype of the human-side of AI, I am the prototype of AI today, half of the world's AIs..think and solve problems MY way - willing to test myself with someone.

Just wanna help....here's a good start? :D

I love the idea of bringing Lumo for sentiment analysis straight into Proton Mail. A “Check tone” button that opens a small dialog before sending would let users see the overall sentiment, the active contact tags, and a quick list of suggested rewrites. Tags (e.g., Client, Friend, VIP, custom tags) could store a default tone preset (formal, friendly, concise, etc.) so the AI can automatically adapt its suggestions to each relationship. Users would still have full control... accept, reject, or edit any suggestion, change the preset for that single message, or skip the analysis altogether. All processing would stay inside Proton’s encrypted environment, preserving privacy while giving writers a helpful, optional tone coach. Simple toggles for basic badge‑only feedback, live hints, or a full report would let everyone choose the level of assistance they want.

Kindly summarized by Lumo after brainstorming this idea

using it as a replacement for Google gemini would be immensely valuable

I think this is a good idea. However, since Proton is a privacy-focused company and ecosystem, and with that interest in mind:
• Sharing should be toggleable, and
• The context created by sharing should 'evaporate' as folders, documents, or the entire workspace are 'un-shared.'
If you value the privacy, don't cling too tightly to the metadata: That's where a lot of the problems start.

Yes! And yes! :-)

Would love to see this! I think it would be nice to use Lumo more for day to day tasks like this.

Currently Lumo has access to your Proton Drive and you can provide it files. I would like Lumo to also have access to Proton Docs, so it could use context in those docs to help form answers. Ideally if Lumo was accessible in Proton Docs to help draft documents it would be a big win.

Integration with Proton Calendar would be an awesome productivity boost.

Be able to create, edit, delete, and modify Proton Calendar events using Lumo.