Employees at F.W. Madigan, a Worcester construction contractor, regularly receive suspicious emails from their superiors. The problem is, the emails aren’t really from their bosses, and the messages are scams – attempts at tricking an employee into wiring money to someone, giving tax information or buying gift cards on their behalf. “I’ve had a bunch of them,” said Dennis Serocki, F.W. Madigan’s controller, who handles much of the small company’s information technology matters. “Email – it’s very, very dangerous.” F.W. Madigan is not alone. Image PHOTO/GRANT WELKER Dennis Serocki at Worcester construction firm F.W. Madigan regularly reminds employees to be careful with web security.