Sure, you could pay fastmail $40/year for this, but that's not really the hacker news spirit, and no one on this site knows how to count as low as $40.
The real justifications you can give yourself:
Shared VPS hosting pretty much all bans email, AWS, DO, etc all have ToS that say "no email" as anti-spam measures.
Shared IP space will go straight to spam due to people having spammed on it in the past. Buy a /24 to ensure you don't go straight to spam.
Rackspace ensures you actually own your email, at least moreso than with other shared hosting, and owning your email is important.
costs around $12/year+domain
Complete FUD.
Here is DO's acceptable use policy:
https://www.digitalocean.com/legal/acceptable-use-policy
You can see that they explicitly have policies for email hosts.
Here is a guide they host on how to setup a mail server:
https://www.digitalocean.com/community/tutorials/how-to-run-...
They forbid spamming, not all mail.
> Shared IP space will go straight to spam due to people having spammed on it in the past. Buy a /24 to ensure you don't go straight to spam.
I have had no problems with deliverability to Google from an IP on a shared block. I don't send marketing mails or any other kind of spam though. Microsoft blocks my IP but they are too small (outside businesses) for me to care to give them special snowflake treatment.
Deliverability of your own mails is also irrelevant for the original discussion about using unique email addresses for signing up to services - you don't need to be able to send at all for that.
Note that I am speaking from personal experience here. I have been self-hosting email for over a decade, from the same IP, with (roughly) the same DNS records. Occasionally, for no reason, I will end up on the global spam list for Gmail, Outlook, or iCloud - never more than one at the same time, and never with a discernible reason. The best I can figure is that the IP is allocated to me by a hosting provider that occasionally sends out spam from its subnet (aka any hosting provider that doesn’t block smtp). I have also tried self-hosting a different mail server from a variety of residential IPs in different cities and countries, and ran into the same problem.
And actually I think this is a kind of setup people could get into: an Android dist that focuses on self hosting off an older device.
Why do you need a dc rackspace and a /24 just to have your email ?