I use gmail.
My subscription to the list is directly to this gmail acct.
I get a few that are flagged as suspect but find very, very few
As others have noted, list emails from that mythical person referred to as Turbo never show up anywhere in gmail. He and I have emailed directly many times but for some reason, his (and possibly others) just disappear... The only way that I see Jim's list email is if someone replies with a quote of his email.
So I’ve noticed I’m not getting emails from CRTech and other email lists and have found a common denominator. They all keep the sender’s email address