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.
Neat
As every business is trying to manage files and paper, we partnered with Neat in 2012 to be able to not only sell but support their NeatDesk and NeatReceipts software and scanner solutions. These document scanners use patented OCR and parsing technology to identify and capture key information from scanned documents, then populate that data automatically in a robust digital filing system that is easy to use. Tame that paper tiger!