> Email is federated, but everyone running and managing their own email servers is too costly, so for consumers, it migrated to large sites. Well, federation i

> Email is federated, but everyone running and managing their own email servers is too costly, so for consumers, it migrated to large sites. Well, federation is the sweet spot between distribution and centralization. I've run my own email service for quite some years now, it is just fine. A lot of people have bad experiences running their own mail senders though, because they do not go through the checklists and deliverability tests to make sure things come through. Google's SMTP service will only accept mail over TLS, most good email services will reject mail from servers which do not have a matching rDNS on their IP, most will reject senders who have not set up SPF and DKIM, some will reject those which do not have a DMARC policy (including a reporting address). If you use any good email deliverability testing tool, and iron these issues out in your configuration, you can fairly reliably deliver emails.