Yeah, it’s not technically impossible to stop web scrapers, but it’s difficult to have a lasting, effective solution. One easy way is to block their user-agent assuming the scraper uses an identifiable user-agent, but that can be easily circumvented. The also easy and somewhat more effective way is to block scrapers’ and caching services’ IP addresses, but that turns into a game of whack-a-mole. You could also have a paywall or login to view content and not approve a certain org, but that only will work for certain use cases, and that also is easy to circumvent. If stopping a single org’s scraping is the hill to die on, good luck.

That said, I’m all for fighting ICE, even if it’s futile. Just slowing them down and frustrating them is useful.

Rolling your own email is a pain. That said, I use a VPS and host my own server with domain name and site for $5/month. Setting it up was a pain, but once you get all the records right so you’re not considered spam, it works really well. That said, I haven’t done anything with webmail; I strictly use IMAP and SMTP.