Yes I remember, but this was a different world, it was a world without reputation networks, without ip black lists, with SPF/DKIM. There is not reason at all t

Yes I remember, but this was a different world, it was a world without reputation networks, without ip black lists, with SPF/DKIM. There is not reason at all to suspect that a message from a small server with proper SPF and DKIM that has never sent spam (for real or spoofed, see SPF), is spam. The other half is from small servers that sprung over night and have no reputation. Half of the spam I receive is from google/outlook/amazon. They don't block each other, do they?