Also, check out "ciphermail". It's end-to-end encryption mail server.

I agree with KN4MKB. I've been hosting my own mail server for decades. Not one issue. I use that in lieu of a mail service provider (Google immediately comes to mind), as their EULA service agreement will tell you that - since you're using their service, on their servers - anything goes. Read the fine print on Gmail, and you'll see. 😉

Also...shouldn't we talking more about self-hosting rather than privacy and efficiency issues? I think the topic is a moot point - either you feel that Cloudflare is 'trustworthy'...or you don't.

IMHO, it's sorta like using Google's Gmail for business purposes. Read the fine print - they can do whatever they want with your data, despite their privacy statements. Same goes with Cloudflare. You're using *their* services on *their servers.

They have to lookout for themselves and the risks involved.

I don't trust anyone to host my email for me, esp. cloud service providers where your data could be ANY...WHERE in the World. I trust 'me, myself, and I' sandwiched behind 3-4 firewalls.

I'm also using 'ciphermail' for sending/receiving encrypted emails, too for the more 'sensitive' material (nothing illegal; just proprietary projects and don't want Google sniffing around).

It also helps that I 'own' (and I use that term very loosely) my IP addresses, so it kinda helps with reliability and veracity issues.

Agreed. I use Promox with Mailcow/SOGo. Works beautifully.

And people who think it's a 'one and done' are gravely mistaken. It's a constant monitor 'n tweak. Spam doesn't resolve itself... 😉

I would second the vote on the creation of a Dockered setup that would allow for save configurations. I know many others who'd agree with me - many people (like me) just don't have the time to futz around most times to staging up a small app such as tis.