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I am also in favor of placing metadata as a separate message into the first MIME part of `multipart/encrypted`. This solution is easier to reason about as it does not...

SEIPDv2 packet already allows chunked decryption: https://www.rfc-editor.org/rfc/rfc9580.html#section-5.13.2 But this does not solve the problem of verifying the signature over the part of the message, normally Signature packet signs the whole...

The options are: 1. Two separate MIME messages 2. Single MIME message with two OpenPGP messages inside 3. Single OpenPGP message Only the third option requires chunked decryption and detached...

Have to re-read all of this, but two separate MIME messages is probably the easiest, as it will not cause any troubles with filtermail on chatmail servers. Messages can arrive...

There is a problem with 1:1 chat assignment. If there is no Autocrypt-Gossip on outgoing message, then to_id gets converted to email contact. If there is also a Chat-Verified header,...

So at #6096 there is an attempt to just add contact to the contact list. But the contact is simply named "xstore" and is not discoverable, you need to also...