An easy way to determine legitimacy of an unexpected email is to reply (without opening the inbound message) and ask the sender whether they intended to send you the message and/or attachment.
Citrix
Creators of GoToMyPC, GoToManage, GoToWebinar, GoToMeeting, GoToAssist and more, we are proud to offer Citrix products that enable remote access, technical support, monitoring, meetings, training, and more. Daily, we use Citrix products for support, monitoring, meetings, and training. We can show you how these products can extend your reach beyond the corporate home office.