can you configure a mail server to reject any emails not send by a Deltachat client? Or on an account level with sieves or the like?
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can you configure a mail server to reject any emails not send by a Deltachat client? Or on an account level with sieves or the like?
treefit
in reply to flora (Shonk Edition) • • •you can use "Chat-Version: 1.0" header in emails to detect deltachat emails.
https://github.com/deltachat/deltachat-core-rust/blob/main/spec.md#outgoing-messages
maybe related:
#chatmail servers (custom dovecot setup/config) reject sending unencrypted emails, I guess you could also make a server that rejects unencrypted emails.