Unverified50% confidenceSolutionExact time
For highly sensitive email communications, a safer alternative is to use end-to-end encrypted email services such as ProtonMail or Tutanota.
1
Sources
50%
Confidence
Long-term
Relevance
10/7/2026
First Seen
Sources
Related Entities
Related Claims
VerifiedMainstream encrypted email services such as ProtonMail and Tutanota are mostly hosted services where data, though encrypted, is still stored on the service provider's servers, whereas Hansel's self-hosted positioning shifts control to the user's side.77% similarUnverifiedMost mainstream email service providers use server-side encryption (encryption at rest), where emails are encrypted but the provider holds the decryption keys and can read the plaintext of emails at any time.73% similarUnverifiedMainstream ESPs such as SendGrid and Mailgun recommend isolating transactional and broadcast emails through separate sub-accounts or IP segments.71% similarUnverifiedThe open protocols of email enable seamless interoperability among Gmail, Outlook, ProtonMail, and self-hosted servers.68% similarUnverifiedMany enterprises configure noreply addresses as real but unmonitored mailboxes, causing emails replied to by users to be successfully delivered and stored.66% similar
Cite This Claim
Stable URI
https://kongchang.com/claim/984538API
curl https://kongchang.com/api/v1/knowledge/claims/984538MCP
get_claim(id=984538)