@twylo fuck them with a knife. Depending on your definition of self-hosting, it can be made a bit better by switching providers. After years of deliverability problems on my server (spf, dkim etc) i accidentially sent an email to a test gmail account from a barely configured AWS EC2 instance. No spf, i doubt it even had matching PTR. Right to my inbox.
So your IP range matters. I did not want to route my personal data to Amazon, but setting up a smarthost at Linode helped.
Generalistic Mastodon instance for open-minded people. Instance Mastodon généraliste pour personnes ouvertes d'esprit.