I just got some spam from American Ninja Warrior. They used anw.20.MYSUFFIX@spamgourmet.com. I haven't used MYSUFFIX in about 10 years and never used anw as a prefix. I suspect they guessed at MYSUFFIX, which is a an English word. obviously targeting Spamgourmet accounts.
The return address was andrea.anw4@gmail.com
Tim