Using IMAP, I would like to delete email attachments in the email client Evolution (Version 184.108.40.206, Ubuntu 16.04). Normally, it works perfectly as described at How to delete an attachment in an email in Evolution?. However, if the received message is signed with a GPG key, I can hit "Remove Attachments", but nothing really happens. The attachment should also get removed on server side of course. Does anybody experience the same problem or even has the solution?