insert_email's recipients loop did `for a in parsed.get(kind, [])`, but the parser sets
reply_to=None when there is no Reply-To header, so .get returns None (key present) and the
loop raised 'NoneType' object is not iterable — aborting the entire Gmail backfill on the
first such email (i.e. almost immediately). Fixed with `or []`. Regression test
test_insert_email.py (reply_to=None, all-None recipients, happy path).
Because the scheduler intentionally skips error-status accounts (no retry storms), an
errored mailbox would never resume on its own. "Sync now" now clears error status first,
so it is an explicit retry; backfill resumes from its saved cursor and dedups by
Message-ID, so nothing is re-captured.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
Keysat
ea036f49a6