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961cacd795
Fix https://github.com/chatmail/core/issues/8195 Supersedes https://github.com/chatmail/core/pull/8217 The most interesting change is in `delete_expired_imap_messages()` because there, messages are marked for deletion on single-device chatmail profiles. The logic in `delete_expired_imap_messages()` was wrong before, and pre-messages were not deleted at all. This is fixed by also querying `pre_rfc724_mid` in addition to `rfc724_mid` from the `msgs` table. In order not to make the SQL statement too complex, I split it into two. WRT tests: - `test_immediate_autodelete()` tests the auto-deletion; `test_imap_autodelete_fully_downloaded_msg()` tests that even for a message that is split into pre- and post-message, both messages are deleted. - A lot of tests test that if bcc_self is on, messages are not auto-deleted. E.g. `test_one_account_send_bcc_setting()` and `test_markseen_message_and_mdn()` relies on the fact that messages stay on the server when bcc_self is on. - Unfortunately, it is not possible to test that messages are only deleted for chatmail servers, because we don't have any tests that use a non-chatmail server.