I am using several proton mail accounts. Some emails have to be filed into mail folders of a different account. The only way to move email between Oroton accounts is by using another email client (I use Thunderbird) with Proton Bridge.

It would be great if the Proton email clients (on all platforms) allowed inter-account moving of emails if technically possible.

I don't understand how this isn't already a thing. I've been sorting multiple email accounrs like this for years, lack of this feature is making it very difficult to move from gmail to proton.

I strongly support this feature request. It also applies to the iOS Proton Mail app by the way!

The current UX/UI for handling multiple Proton Mail accounts in the macOS desktop app is frankly very poor. Having to click the user icon, select another account, and then wait for a full reload just to check whether there are unread emails is far too many steps for a basic, high-frequency action.

There is no at-a-glance overview of unread emails across accounts, which makes managing multiple inboxes unnecessarily slow and frustrating. Compared to Apple Mail and other native macOS mail clients, this feels like a significant usability regression rather than a limitation.

A persistent sidebar with all accounts and unread indicators is not a “nice to have” — it’s essential for anyone using more than one Proton Mail account. The current approach breaks workflow, adds cognitive load, and does not scale beyond a single account.

This feature would dramatically improve productivity and bring the macOS app in line with established desktop mail UX expectations.

I would also like to be able to add outside mail and have a unified inbox.

So spammers are just allowed to spam these comment threads endlessly? Why aren’t they being removed?

Similar to Microsoft outlook on desktop, have your proton mail account, then the ability to add other emails (eg gmail, outlook, etc) so you can access all your emails in the same place

When using multiple Proton email accounts, it would be great to have the option to view all emails in a unified inbox within the ProtonMail app, similar to how it works in Apple's Mail app on iPhone. This way, there would be no need to switch between accounts to check for new emails.

It's time for me to go back to using Thunderbird and call my evaluation of Proton Mail clients (Desktop, Phone App, Web App) complete. Thunderbird allows me to use ALL of my email accounts from one program (Desktop program or Phone app) including Proton via Proton Mail Bridge. When convenient, I can still use the Proton clients when I want to. All in all, it just doesn't make sense for me to waste time using company-specific clients, be it Proton, Microsoft, Comcast, etc. I'll use the management features of Proton mail, such as message filtering along with TBird for daily common emailing tasks--or perhaps I'll use the TBird filtering (to be decided).

Would like to have two instances of mail as well. Business and private.

How odd: Proton combined my post (the more general idea below rather than the Mail-specific idea) into this one instead of the "proper" vice-versa combination. Obviously, allowing multiple instances applies to other Proton apps (Pass, e.g.) and not only Mail.

Currently, the Proton desktop apps do not allow multiple instances to be run, but rather, require switching accounts. I use my Duo account to work simultaneously with personal and business mail, passwords, drive, etc., while using one Duo account for personal and the other for business. Having to switch accounts all the time is tedious.

just use https://www.emclient.com/download

This is one of the most irritating things for me. At least for web I can just save shortcuts to the different inboxes and there is a "switch to" function directly on the top right account menu. The desktop app still has the "switch or add account" and takes a long time top load the other inbox. I feel like the web is faster than the desktop at this point.

Hello,
is it the same as this suggestion?
https://protonmail.uservoice.com/forums/284483-proton-mail/suggestions/48861785-proton-mail-desktop-email-client-multiple-accoun

No-one else interested in this? This keeps me from using the desktop app.

I suggest enabling the ability to have multiple independent Proton Mail accounts open simultaneously in the same desktop app, accessible via tabs or a quick switch feature. This would streamline workflows for users managing multiple accounts.

It would be great to be able to add other email accounts to the client and have a view all at once or view by mailbox with a quick and easy selector like mailbird or thunderbird. Preferably for any email account, not just protonmail. at the moment Im going to need to use protonbridge as I cant add my other emails (that cant be forwarded for reasons such as charity emails or work emails).

I have several @proton mail and calendar accounts. It is too cumbersome to change them in the desktop app for MacOS. They should all be listed in the main pane.

Second that!

I'd love to be able to run multiple instances of the Proton desktop app, so I can have my calendar and my mail open at the same time and alt-tab between them. Having to navigate from calendar to mail is frustrating when making appointments via email.