Heck, I'm impressed that enough people are running an MTA that touches incoming mail for this to be effective. It was never "easy", even in the 90s. Back then

Heck, I'm impressed that enough people are running an MTA that touches incoming mail for this to be effective. It was never "easy", even in the 90s. Back then it was an issue of having a performant, secure config. But these days, it's way more complex and too much money. I wouldn't think that many people are using fetchmail + local MTA anymore, but maybe I'm wrong. I used to do it for my family, but maintaining an MTA, spam filtering, IMAP/POP, webmail, CalDAV & CardDAV is rough. And supporting folks hooking up their devices that increasingly needed to go 8 menus deep to punch in the settings for something that wasn't gmail/hotmail/outlook was just too much. And then you can't run it out of your house, unless you pay money for static IPs, or you pay for hosting and make sure you keep yourself off blocklists. Just the cost of doing it made it not worth it unless you hit economy of scale number of users. That said, sendmail did improve my M4 skills FWIW.