JustfixemailProtonMail Not Loading or Syncing
1. Web app stuck loading
- Hard refresh — Ctrl+Shift+R or Cmd+Shift+R.
- Try a private window. Ad blockers and VPN extensions in particular are one of the more common causes I've run into for Proton's encrypted interface just refusing to load.
- Check status.proton.me before digging further — sometimes it's genuinely on their end.
2. Mobile app not syncing
- Pull down to refresh the inbox manually.
- Check that background app refresh is enabled for Proton Mail in your phone's system settings, not just inside the app itself — this one's easy to miss.
- Still stale after a manual refresh? Log out and back in.
3. Proton Mail Bridge (desktop clients like Outlook/Thunderbird via Proton)
Because everything's encrypted, third-party desktop clients connect through the local Bridge app rather than Proton directly. Worth understanding, because it changes where you should actually look when something's off.
- Confirm Bridge is actually running in the background — check your system tray or menu bar first.
- Reconnect the account in Bridge if it shows disconnected.
- Your mail client needs the Bridge-generated password, not your normal Proton login. If you're not sure which one you're using, just regenerate it from Bridge.
If Bridge specifically won't connect at all — not just showing stale mail, but genuinely refusing to reach Proton's servers — two things to check before anything else:
- A VPN with ad/malware blocking enabled can interfere with Bridge's connection. In Bridge → Settings → Advanced Settings, try disabling "Alternative Routing," or temporarily turn the VPN off and restart Bridge to confirm that's the cause.
- Antivirus or firewall software blocking Bridge specifically. On Windows, the default install path is
C:\Program Files\Proton AG\Proton Mail Bridge\proton-bridge.exe— add an exception for that path (and its Updates folder) in both your antivirus and Windows Firewall settings.
4. "Decrypting message" errors
Rare, in my experience, and it usually clears up after a resync. If it keeps recurring, it can point to a key sync issue between devices — I'd go straight to Proton support rather than trying to fix keys manually. Mishandling encryption keys can make mail permanently unreadable, and that's not a risk worth taking on your own.
FAQ
Why would an ad blocker break ProtonMail specifically?
Proton's interface relies on encrypted scripts that some ad blockers mistakenly flag as trackers. A private browser window (which typically disables extensions) is a quick way to test this.
What's Bridge, and why does it matter?
Bridge is the local app that lets desktop mail clients like Outlook or Thunderbird connect to ProtonMail's encrypted mailbox. If a desktop app can't connect, confirming Bridge is actually running is the first thing to check.
How do I know if it's an outage rather than my own setup?
Check status.proton.me — if there's a confirmed issue there, no amount of local troubleshooting will fix it until Proton resolves it on their end.