def METHOD_NAME() -> None:
    """Downgrade database bind ''."""
    with op.batch_alter_table('mailer_recipient', schema=None) as batch_op:
        batch_op.drop_index(batch_op.f('ix_mailer_recipient_md5sum'))
        batch_op.drop_index(batch_op.f('ix_mailer_recipient_email'))
    op.drop_table('mailer_recipient')
    op.drop_table('mailer_draft')
    op.drop_table('mailer')