There are a number of extensions our mail filters block for inbound emails;, .exe, .bat...One of those extensions by default (in the program we us: Symantec Mail Security for SMTP) is a .bin file.
On two occasions, someone has sent us a .xlsx and a .bin file has been removed from the email and the spradsheet will not open. I know I could just allow .bin files and it would work but what do you think is happening here? Why is there a .bin file in the email and what does that have to do with the .xlsx spreadsheet?
Thanks in advance!