# stdlib-only (smtplib + imaplib + email are all built into Python)
# fsspec is only needed when approval_dir is a cloud URI (s3://, gs://, abfs://).
# Install the appropriate driver:
#   s3://   → pip install fsspec s3fs
#   gs://   → pip install fsspec gcsfs
#   abfs:// → pip install fsspec adlfs
