def is_email_simple(value):
    """Return True if value looks like an email address."""
    if '@' not in value or value.startswith('@') or value.endswith('@'):
        return False
    try:
        p1, p2 = value.split('@')
    except ValueError:
        return False
    if '.' not in p2 or p2.startswith('.'):
        return False
    return True
