What is a sig file and how do I open a sig file?
SIG, or signature, is a small text file that can be automatically attached to the end of an email. It usually includes the sender's name and email address, company name, title and contact phone numbers. Most email programs support multiple signature files. They can be selected from within the create new message window.
Relevant sig file links:How to open sig file on Youtube
How to open sig file on Wikipedia
How to open sig file on Microsoft.com