[CodeFactor](https://www.codefactor.io/repository/github/python-sifter/sifter3) found an issue: TODO: If "message/rfc822" extract headers and make that searchable It's currently on: [sifter\tests\body.py:73 ](https://www.codefactor.io/repository/github/python-sifter/sifter3/source/master/sifter/tests/body.py#L73)Commit 6d95ba9acb5c6455277b201456ee6a40e091cf3a