Don't be so paranoid
From what it looks like to me, this list was generated by a brute force attack against multiple email servers...by trying multiple combinations of names, letters and numbers until they come across an address that works, then stored it for later use.
Once they had a list of working addresses compiled, they simply alphabetized the list and mailed out their spam.
It pretty much looks like amateurs that sent this out, as they forgot to BCC everyone that this mail went to.