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First of all, chatmail servers normally forbid to send unencrypted mail, so if we know the peer's key, we should encrypt to it. Chatmail setups have `E2eeEnabled=1` by default and this isn't possible to change in UIs, so this change fixes the chatmail case. Additionally, for chatmail, if a peer has `EncryptPreference::Reset`, let's handle it as `EncryptPreference::NoPreference` for the reason above. Still, if `E2eeEnabled` is 0 for a chatmail setup somehow, e.g. the user set it via environment, let's assume that the user knows what they do and ignore `IsChatmail` flag. NB: - If we don't know the peer's key, we should try to send an unencrypted message as before for a chatmail setup. - This change doesn't remove the "majority rule", but now the majority with `EncryptPreference::NoPreference` can't disable encryption if the local preference is `Mutual`. To disable encryption, some peer should have a missing peerstate or, for the non-chatmail case, the majority should have `EncryptPreference::Reset`.
============================ CFFI Python Bindings ============================ This package provides `Python bindings`_ to the `deltachat-core library`_ which implements IMAP/SMTP/MIME/OpenPGP e-mail standards and offers a low-level Chat/Contact/Message API to user interfaces and bots. .. _`deltachat-core library`: https://github.com/deltachat/deltachat-core-rust .. _`Python bindings`: https://py.delta.chat/