[azinman2]

> “ Unlike other services, we do not keep logs nor metadata, never read emails, and are 100% open-source.”

So how do you prevent abuse?

[niftylettuce]

I created tools such as https://spamscanner.net and use ARC + ARF.

[GordonS]

I'm familiar with DKIM and SPF, but haven't come across the acronyms ARC or ARF before?