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The internet is worse than it used to be. How did we get here, and can we go back?
(theconversation.com)
This is a most excellent place for technology news and articles.
Some websites dont allow selfhosted mails, they want one of the big names.
You can get pretty far with setting up DNS entries properly. I just moved most of my accounts to my custom domain (hosting is at Tuta), and I haven't had any issues yet. I find value in paying for hosting, but I think I could self-host if I needed to.