A spam mail matched stefanhacker@gmx.de but "Aktion fehlgeschlagen"
every time: it has no Message-ID header, and the safe move refused to
proceed because it verifies the copy by Message-ID. So every mail
without that header stayed in INBOX forever, and the log didn't say why.
Verification now falls back when there is no Message-ID:
- COPYUID from the COPY response when the server supports UIDPLUS
- otherwise count mails in the target with the same exact size and
sender before and after COPY; exactly one more means it arrived
The source is still only flagged/expunged after verification, and
move_mail now refuses to run without source_folder (the verification
selects the target, so STORE could otherwise hit the wrong folder).
Checked against a simulated IMAP server for success, rejected COPY,
copy not arriving, and missing source folder.
IMAPClient.last_error carries the reason (rejected COPY with server
text, copy not found incl. how it was checked, missing target folder,
no SMTP config, ...); the scheduler appends it to the log message.
"Fehlgeschlagene neu einlesen" now also retries failed actions, not
only fetch errors.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
duffyduckandClaude Opus 5.5
fbb2fe95c8