[Avamander]

Absolutely, my second sentence says how that could change.

I would have thought that it's fairly self-explanatory that anti-spam measures utilize the strongest signals. If sender domain becomes that, it will get more weight.

So if in the future email providers could reject both SPF-less domains and DKIM-unsigned letters, IP's would definitely become less relevant. So, get people to deploy those things.

[amenod]

Sorry, but this is bullshit. If I employ relevant techniques to protect my domain and the protection works, and I am not sending spam (which I am not), then Google (no idea what MS does) should not care about the IP I am sending my e-mail through. I have proved that the e-mail is tied to my domain and they know that my domain is not spamming - what more do they want?

Even better - Google could help small mail server admins by actually providing the information that landed their e-mail in the spam folder. If the protection is tied to the domain, no spammer will be helped by this knowledge.

And I understand that maybe a new domain might be suspicious at first, but after a few years of unchanged ownership (backed by whois data) there is simply no reason to put any mail messages from these domain to spam. Whatever the IP is.

Stop making up excuses for them. They are negligent at best, malicious at worst. Can't wait till they get hit by a lawsuit over this.

[Avamander]

> If I employ relevant techniques to protect my domain and the protection works, and I am not sending spam (which I am not), then Google (no idea what MS does) should not care about the IP I am sending my e-mail through.

They definitely take the IP less into account if other things are more trustworthy. Totally ignoring it would be short-sighted from them. There are many cases where the domain is fine but looking at the IP and its usage patterns helps prevent abuse. Be it misconfigured (and then abused) SPF, stolen DKIM keys, public website that's email-capable getting compromised, these things happen a lot.

> Even better - Google could help small mail server admins by actually providing the information that landed their e-mail in the spam folder. If the protection is tied to the domain, no spammer will be helped by this knowledge.

They have a significant amount of content-based filtering, knowing that helps spammer reword their crap and bypass those.

> I have proved that the e-mail is tied to my domain and they know that my domain is not spamming - what more do they want?

That's also part of the thing, you can't prove and enforce this for both envelope and header from at the same time. Not to mention how minuscule the amount of perfect and strict SPF+DKIM+DMARC is out in the wild. At this point in time IP's are a very strong signal.

> Stop making up excuses for them. They are negligent at best, malicious at worst.

I haven't made a single excuse, I'm explaining why things work the way they do. You calling it bullshit won't make it so.