Is this file safe?
Often times we can receive a file we think is genuine, but may not be 100% sure, especially when they are sent to published email addresses for business sales or enquiries.
Of course the safe answer is to delete it, but another solution is to check it with Virus Total.
Virus Total “is a service that analyzes suspicious files and facilitates the quick detection of viruses, worms, trojans, and all kinds of malware detected by antivirus engines” It will process your file through 40 or more Malware scanners and give you a list which scanner found what nasty in the file (or that it is clean)
It’s a wonderful resource for peace of mind.