I'd like to suggest to omit the Autocrypt header in messages that are already encrypted for the recipient. If "Attach my public key to messages" is enabled, the 2nd public key in the Autocrypt header seems to be especially confusing. As Patrick pointed out this is against the specs. But even if it wasn't it would be quite dangerous to omit the header if my public key was already attached as it gives away information about potentially large parts of the contents of the encrypted message. (Note: Enigmail...
I didn't know. Thanks a lot for clarifying this!
Omit Autocrypt header for encrypted mail [feature request]
It is included in opendkim-2.11.0.Alpha0, last modified 2015-10-22. Unfortunately,...