# How-to: Delta Chat interoperability with other ENCRYPTED email clients **URL:** \ **Category:** Show and Tell\ **Created:** [February 12, 2026, 9:35pm UTC](https://forum.delta.chat/t/how-to-delta-chat-interoperability-with-other-encrypted-email-clients/4726 "2026-02-12T21:35:26Z")\ **Posts on this page:** 1\ **Showing post:** 3
**Author:** ![Minim](https://forum.delta.chat/letter_avatar_proxy/v4/letter/m/ccd318/32.png) [@Minim](https://forum.delta.chat/u/Minim)\ **Post date:** [February 13, 2026, 3:04am UTC](https://forum.delta.chat/t/how-to-delta-chat-interoperability-with-other-encrypted-email-clients/4726/3 "2026-02-13T03:04:00Z")
I think Protonmail does not support Autocrypt? Related: > [@Is it possible to communicate with non-DC user? (interoperability with email)](https://support.delta.chat/t/is-it-possible-to-communicate-with-non-dc-user-interoperability-with-email/4425): > > let’s say, some person A isn’t yet convinced to install chatmail clients on their devices, but they use email and, if necessary, they could try a certain MUA (one supporting [Autocrypt](https://autocrypt.org/) etc), and do some technical setup (import PGP keys) in advance, to connect with person B (a delta chat enjoyer). is it possible to for person B to use DeltaChat (or another chatmail client?) to communicate with person A, without person A installing any chatmail clients, relying only on well-known, established pr… --- _[View the full topic](https://forum.delta.chat/t/how-to-delta-chat-interoperability-with-other-encrypted-email-clients/4726)._