Our error tracking shows this does not happen often (1-2% of Bridge users) and the symptom is usually incorrect display of messages or read/unread status which is fixed with an inbox resynchronization.

Unfortunately, there are hundreds of email clients, and some email clients don’t handle errors properly, and this leads to desynchronization. When there are network issues, this library returns errors to email clients. Bridge is open source, and as a result relies upon open-source components, and the root cause is an architectural issue in a library that Bridge uses to implement IMAP. The fact that Bridge and its client can become desynchronized sporadically for some users is a high priority issue we have been working on. For clarity, the issue mentioned here only impacts Proton Mail Bridge, our desktop IMAP/SMTP gateway to Proton Mail encrypted email. By overcoming CPU limitations that affect how VPN protocols are processed, using advanced networking techniques to reduce latency, and redesigning VPN protocols themselves to reduce inefficiencies in their code, VPN Accelerator can dramatically increase speed performance.This is Bart, Proton CTO here.

VPN Accelerator is a set of technologies unique to Proton VPN that can increase your VPN speeds by over 400%. Our fast server network and unique VPN Accelerator technology also ensure your experience is smooth and buffering-free. Proton VPN unblocks a wide selection of popular online media services, allowing you to access your favorite streaming content from anywhere in the world as if you were at home. Proton VPN has native apps for Windows, macOS, Linux, Chromebook, Android, Android TV and iOS/iPadOS.

A secure Internet connection that you can trust is essential to maintaining your privacy on your laptop at home, your mobile device on the road, or your workstation at the office. Proton VPN is available on all your devices, including PCs, Macs, smartphones, and even routers.

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