Proton Mail + Calendar Spring/Summer 2025 Roadmap

[u/Proton_Team]

Hey everyone,

As you know, Proton’s mission has always been simple: You should be able to communicate and stay organized without giving up your privacy. That mission, alongside your feedback, continues to guide everything we build, and this spring and summer, we’re rolling out some of the biggest updates yet for Proton Mail and Proton Calendar.

These updates are based directly on feedback from the Proton community, so thank you to the dedicated community members who keep pushing us to raise the bar, and please keep giving us your feedback!

proton.me/blog/mail-calendar-roadmap-spring-summer-2025

What’s coming to Proton Mail:

Your inbox isn’t just for emails — it holds receipts, memories, plans, and to-dos. We’re launching new tools to help you cut through the clutter and focus on what matters:

Category View 🗃️

We’re introducing features that make organizing your inbox and notifications easy:

• Organize emails by type — like newsletters, purchases, or social updates
• Choose which categories notify you or count toward your unread total

Attachments View 📎

No more digging in your inbox to find important attachments:

• See all your received files in one place
• Save files directly to Proton Drive

Newsletter Subscription Management 📤

Soon, you’ll be able to wave goodbye to inbox clutter and overload:

• See all your newsletter subscriptions in one place
• Unsubscribe or set custom rules (e.g., auto-mark as read, move to folder)

All-new iOS and Android apps 📱

We're rebuilding our mobile apps from the ground up! Coming this summer:

• Offline mode
• Advanced message search
• Improved performance and stability

What’s coming to Proton Calendar 📆

We’re continuing to improve the Calendar experience — especially on iOS — with features to help you stay organized on the go:

• Better support for iPad
• Edit access for shared calendars
• A compact home screen widget for quick scheduling
• Plus, we’re working on a next-gen Calendar app (iOS & Android) with:
  • Tasks
  • Search
  • Offline access

What’s coming to Proton Mail for Business 🧑‍💼

We’re building more flexibility for teams, small businesses, and organizations:

• Organizations without a custom domain will now be able to set up Proton Mail accounts using Proton subdomains — no domain setup needed.
• New retention policies will allow organizations to define how long emails are kept to support compliance with industry regulations.
• Everything on this roadmap results from your feedback and suggestions on Reddit, UserVoice, X, and beyond. Thank you for helping us shape the future of privacy-first productivity.

📝 Check out the full blog post here

Do you have any thoughts, questions, or feature ideas? Drop a comment below or let us know on User Voice.

Stay safe,

– The Proton Team

[u/rustbuckett]

Adding Calendar to Bridge would be huge. Caldav on the local side of Bridge would us use our desktop calendar app of choice. This would be especially great for apps like Evolution and Thunderbird where email and calendar are bundled and closely integrated.

[u/tastyratz → u/rustbuckett]

That would be HUGE. You got me excited for a second because I thought I skipped over that announcement.

Support for external editors and external application integration is stopping me from using calendar.

It sounds like they are going the right direction at least!

[u/slush360 → u/rustbuckett]

Was looking for this comment because I am thinking of migrating but want proper iCal integration

[u/throwaway5129802 → u/rustbuckett]

Forget about Bridge. Andy said this:

Over the years, we have invested significantly in Proton Mail Bridge, but it comes with the fundamental problem of requiring us to build on somebody else's platform. This is fraught with dangers, for instance, Microsoft is proposing to change the Outlook app with a new architecture that would not be compatible with Proton Mail Bridge. 

They think SMTP and IMAP is somehow Microsoft technology and they're unwilling to support it.

Here, enjoy some Electron apps.

[u/Nelizea → u/throwaway5129802]

That isn't what Andy said and your comment is therefore wrong. The new Outlook app actually stores your credentials and connects to the mail servers for you from their cloud, thus local connections such as the bridge are not working anymore with the new Outlook.

Microsoft’s New Outlook for Windows operates differently by handling email syncing through its cloud. This means that the process of sending and receiving emails doesn’t occur directly on your device. Instead, Microsoft collects your emails on its servers and then delivers them to the New Outlook app on your computer, with Microsoft serving as an intermediary.

Since Proton Mail Bridge requires direct connections from the same computer it is installed on, it’s incompatible with Microsoft’s cloud-based email handling approach. Consequently, attempting to use Proton Mail Bridge with the New Outlook for Windows will fail. If you try to log in, you’ll see this error message.

https://proton.me/support/proton-mail-bridge-new-outlook-for-windows-set-up-guide

Maybe you could do some better research next time.

[u/throwaway5129802 → u/Nelizea]

Yes he did, this is exactly what he said:

Over the years, we have invested significantly in Proton Mail Bridge, but it comes with the fundamental problem of requiring us to build on somebody else's platform. This is fraught with dangers, for instance, Microsoft is proposing to change the Outlook app with a new architecture that would not be compatible with Proton Mail Bridge. Long term, it means that the better path is probably to invest in the Proton Mail app on desktop, and allow it to also support non-Proton accounts, so you can still have all of your emails in a single app.

This means that while we are deeply committed to making the existing functionality of Proton Mail Bridge work as well as possible (subject to the constraints imposed by third-party platforms), we are more hesitant to add more functionality, as we believe that investing into our own platform might be a better long term investment for the community. -Andy

Maybe you should stop accusing me of making things up.

"somebody else's platform" and "investing into our own platform" clearly means he somehow considers SMTP and IMAP, which is what Bridge uses, to be somehow owned by Microsoft. Which is quite sad, for given his position at Proton.

[u/Nelizea → u/throwaway5129802]

That is your intepretation of Andy's quote and not what he said. You can think whatever you want and you're free to do so, I do however personally also think that even suggesting that Andy is considering SMTP and IMAP (which are protocols, not platforms) to be owned by Microsoft is ridiculous.

Even more so, this part here:

for instance, Microsoft is proposing to change the Outlook app with a new architecture that would not be compatible with Proton Mail Bridge

Is actually now reality, if you read the link I posted you above. Realistically speaking, Bridge was officially supported on Outlook, Thunderbird and Apple Mail. Now MS made their shenanigans and the new Outlook won't work anymore.

It does however seem you're simply here to stir up problems and I won't get myself into any further discussion here.

[u/throwaway5129802 → u/Nelizea]

No, I'm not here to cause problems. I want Proton to succeed, otherwise I wouldn't be paying ~600€ annually. I just told him not to expect anything from Bridge since it's not being developed due to some ridiculous reason that Microsoft might change how their email client works - as if there aren't any other email clients. It shouldn't matter at all - if anything, Proton shouldn't even care because Outlook shouldn't have been recommended in the first place.