On 26/04/2023 22:05, Default User wrote:
it absolutely refuses to delete email messages directly from the [Gmail]/All Mail folder of any email account.
Disclaimer: I do not use evolution.Do you use IMAP for your gmail account? Notice that IMAP assumes tree-like structure of folders and messages. Gmail uses concept of labels, so the same message may have multiple labels. When mapped to IMAP it means the same message (not a copy) may be accessed from different folders. Moreover All Mail is a meta label/folder that includes every message (besides trash?). I am unsure if it can be reasonably handled using conventional IMAP.
So gmail IMAP accounts may be special to some degree for mail clients. Perhaps some kind of cooperation between a mailer and the server is necessary. I am unsure at which moment a message should completely disappear from the server in response to removing it from particular folders (actually labels).