It's weird how entire TLDs get reputations like that. NY's transit agency - the MTA - used (and still uses) the domain mta.info. My high school blocked that do

It's weird how entire TLDs get reputations like that. NY's transit agency - the MTA - used (and still uses) the domain mta.info. My high school blocked that domain, along with every other info domain. I have a .xyz domain that I briefly wanted to use for email, but services blocked it based entirely off the TLD. Using the same mail service (fastmail) I could send mail from my .net domains.