Proton Mail: Encrypted Email

What Happens Right After You Install Proton Mail

Open the app and the first thing you see is a clean login screen. No ads. No tracking prompts. Just a field for your Proton account credentials. If you do not have an account yet, the sign-up process asks for a username and a password. That is it. No phone number required. No recovery email demanded unless you want one. The app then asks if you want to enable biometric unlock. That step is optional. Skip it and you are inside the inbox within thirty seconds.

The inbox itself looks familiar. Folders on the left. A list of emails in the center. Swipe gestures work on individual messages. Swipe right to archive. Swipe left to delete. The interface feels like Gmail but stripped of all the extra clutter. No promotional banners. No "Try Gemini" buttons. No suggested replies popping up. Just emails and a compose button. The dark mode toggle sits in the settings menu. Turn it on and the entire interface shifts to black and dark gray. The contrast is sharp. Reading emails in low light becomes noticeably easier.

But here is the reality check that hits within the first few minutes. Send a test email to a Gmail address. Compose it. Hit send. The app confirms it is encrypted. But that encryption only protects the message while it travels from your phone to Proton's servers. Once it lands in the Gmail inbox, Google can read it. The app does not warn you about this upfront. It just says "encrypted" and leaves you to figure out the fine print. That is the onboarding reality. You get a beautifully private inbox that only stays private when the person on the other end also uses Proton Mail.

What Happens When You Migrate Your Gmail Into an Encrypted Vault

Proton Easy Switch is the feature that pulls emails from Gmail, Outlook, Yahoo, iCloud, or AOL directly into your Proton inbox. Tap the import option. Select Gmail. Authorize the connection. The app starts pulling your entire email history. Old messages. Sent items. Drafts. Everything lands inside your Proton account. Here is where the original analysis comes in. Those imported emails are stored on Proton's servers with zero-access encryption. Proton cannot read them. Neither can Google anymore because the copies on Proton are encrypted. But the original copies still sit inside your Gmail account unless you delete them. So you now have two versions of every email. One readable by Google. One readable only by you.

The workflow gets stranger when you reply to an imported email. You open a message that came from a Gmail user. You hit reply. Type your response. Hit send. The app encrypts that reply on Proton's servers. But the recipient gets it through Gmail. Google can read your reply on their end. So your entire migrated mailbox is now encrypted and private, but every new reply you send to non-Proton users leaks back into the readable zone. The app does not flag this. It does not suggest switching the recipient to Proton. It simply sends the email and marks it as sent. The privacy gap is not a bug. It is how email works. But Proton does not explain this during the migration process. Users discover it by sending a few emails and wondering why their "encrypted" messages appear plaintext in the recipient's inbox.

How the App Behaves in Real-World Use

Push notifications arrive reliably for most users. But some report that notifications stop coming after the phone restarts or after flight mode is toggled. Opening the app manually becomes the only way to check for new mail. The app does not crash frequently, but when it does, it usually happens while opening an email from the notification bar. Clearing the cache does not always fix it. Reinstalling helps temporarily. The freezing issue has persisted across multiple updates according to user reports. The app also has a typing delay problem. Composing a long email causes the text input to lag behind your fingers. Deleting a word takes a full second to register. This happens on both Android and iOS.

Spam filtering works well. The app catches most junk mail and puts it in a separate folder. The unsubscribe button appears at the top of promotional emails. Click it and the app attempts to remove you from the mailing list. It works about seventy percent of the time. The remaining thirty percent require manual unsubscribing through the sender's website. The app does not have a live chat or phone support option. Free users get email support only. Response times vary from a few hours to several days. Paid users get faster responses but still no live chat. The Proton Bridge feature, which allows using Proton Mail with desktop email clients like Outlook or Thunderbird, is restricted to paid subscribers.

The 28-Day Expiration Limit on Password-Protected Emails

Password-protected emails are one of Proton Mail's most useful features for communicating with non-Proton users. You compose a message, set a password, and share that password with the recipient through a separate channel. The recipient opens a link, enters the password, and reads the email on Proton's secure server. The email never lands in their regular inbox. It stays on Proton's servers and expires after twenty-eight days. That expiration is not adjustable. Not for free users. Not for paid users. Once the twenty-eight days pass, the email is permanently deleted from Proton's servers. The recipient cannot access it again. You cannot extend the expiration period. The only workaround is to resend the email with a new password. The app does not warn you about this limit when you compose a password-protected email. It simply sets the expiration and sends it. If you need to keep a message accessible for longer than twenty-eight days, you must use a different method, such as sending a regular encrypted email to another Proton user or using an external encrypted file-sharing service.