I have gotten them from email addys with and FTDI extension, as well as Floristboard and many others like teleflora and so on.
It is not unusual, these days, and just because it says FTDI or whatever that does not mean thats where it came from. The big guys are pretty careful with their systems, and everything that FTD sends out goes thru MessageLabs prior to being sent.
Most likely, it came from someone that did not even knnow they sent it, because they picked up the bug, and their systems sent it.
The only way to be sure your safe these days is to run programs that filter in INbound and OUTbound, and keep them up to date !!!!!!!