Is there something like a protocol spec that defines how messages have to look like, how imap is utilized and how this relates to available features? I know that under the hood normal encrypted mails are used (or at least I think so), but I always like to peek under the hood and i.e. see how reactio…

Thank you! Through that link I stumbled upon core/spec.md at main · chatmail/core · GitHub which seems to pretty much be an answer to my question.

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Is there a protocol spec?

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development, solved, documentation, open-standards

ian August 13, 2026, 12:43am 2

Document the minimum requirements necessary for chatmail interoperability Chatmail Relays

The effort of documenting all above mentioned implementation details and publishing a full independent implementation based on that in a clean room methodology would strengthen the promise of openness and sustainability. I see you have copy & pasted some of the valuable information here across at least 3 comments. Could you please deduplicate it and consolidate all of it in the top post and perhaps even convert it to a wiki via the admin menu?

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