I’m seeing lots of people subscribing with their real email address to different newsletters or random websites that they might use once in a while.
For a couple of years I have run a proxy SMTP that I kept to forward emails to my real address, as a privacy measure.
People tend to use the “+” sign in order to identify if their address was sold, for example signing up with “michael.john+amazon@gmail.com”, now what most do not realize is the fact that when selling data to third parties, most companies parse their email lists and clear our those “+” sign. (Source: I have worked with companies that do that)
I found the relay from Mozilla to be massively useful in this case, so if anyone is interested, have a try with it:
As a side not: If you’re using firefox, it integrates nicely into your browser, right clicking on a field and selecting “Use relay mask” is enough to generate an instant address so you can easily rotate them for each service.



Again, if your internet provider doesn’t do its best to prevent you from doing that, which most do.
Am I missing something? Hosting providers like hetzner should never do this?
That being said, email hosting can be difficult, for many reasons, so this is clearly not for everyone
I meant self hosting as in hosting it yourself, at home, on your homelab, with your own network. Residential networks tend to block SMTP ports and IPs usually have horrendous reputation, most being blacklisted.
Hetzner, OVH and other hosting providers do not use residential networking. :)
I seem to have misunderstood you there - for me self hosting includes doing that at a Hoster. It just means that you are the admin and am doing it yourself.