I’m really not buying this “gotta use Google mail” or whatever. It really doesn’t matter to their servers. Any email account can have spam filters that could filter out their emails. People just need to look into it and whitelist the Thailand Pass domain for their particular account. I use a private email account and received both the confirmation and QR code. It took 4 days to get the QR code, so patience is needed.
usually one’s experience are the facts. My ex had a car with an LPG system installed. Caused all kinds of problems. They lower the resale value as well.