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Proton Mail Bridge Forensic Artifacts

Local forensic artifacts remain—persistent database files that map account IDs, alias mappings and sync state.

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Feb 4, 2026

What user-side forensic or metadata remains accessible after using ProtonMail Bridge?

Mail Bridge reduces server-side exposure by providing end-to-end encryption between Proton’s servers and a local desktop client, and Proton states it “never permanently store[s] your PGP keys or decry...