# Switch to Protonmail Reason #2: Automatically encrypt messages sent between Proton users end to end

Private correspondence should not require every sender to become a cryptography expert.

2026-09-04
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Switchboard Tech Services


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## Why this matters

Private correspondence should not require every sender to become a cryptography expert. Privacy is easier to defend before this information is collected than after it has spread.

## The protection

Proton Mail automatically applies end-to-end encryption when both sides use Proton addresses.

## Take action

Ask close contacts to use Proton for conversations that need it. Subject lines and routing metadata are not universally hidden. Email protection depends on the route and settings. Ordinary mail involving outside providers is not automatically end-to-end encrypted, and email metadata is not universally hidden.

## Sources

[Proton Mail support](https://proton.me/support/mail).

- Categories:
  [Proton Mail](https://switchboardtechservices.com/guides/categories/proton-mail/)
- Tags:
  [#Digital Self-Defense](https://switchboardtechservices.com/guides/tags/digital-self-defense/), [#Proton Mail](https://switchboardtechservices.com/guides/tags/proton-mail/), [#Email Privacy](https://switchboardtechservices.com/guides/tags/email-privacy/), [#Encrypted Email](https://switchboardtechservices.com/guides/tags/encrypted-email/)

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Canonical URL: https://switchboardtechservices.com/guides/switch-to-protonmail-reason-2/

Language: en-us

Content type: guide

Author: Switchboard Tech Services

Published: 2026-09-04T06:00:39+00:00

Description: Why automatically encrypt messages sent between Proton users end to end matters for privacy and security.