That's not how SMTP reputation scoring works. Even in IPv4 per-IP reputation stopped being sufficient many years ago because bulk senders churn pools and rotate addresses. Modern systems typically score prefixes, ASNs, DKIM/SPF alignment, TLS and behavior.
You can score subnets instead of individual ips.
Re:IPv6 Adoption in 2026
by RupertSalt on Friday February 20, 2026 @08:02AM
(#47087484)
Perhaps you mean “prefixes” such as they are assigned by registrars, and announced by routing protocols.
The instructor of my Cisco classes said that the only module that caused students to break down in tears was VLSM.
Weird. Once I made the analogy with street addresses that are divided into blocks then subnet masking was pretty easy to understand.
Re:IPv6 Adoption in 2026
by winstonwinston on Friday February 20, 2026 @08:25AM
(#47087765)
I published AAAA records for my MX hostnames a few years ago and so far only gmail.com is sending mails via IPv6, which is disappointing.
Re:IPv6 Adoption in 2026
by patmorgan23 on Friday February 20, 2026 @08:38AM
(#47087886)
Microsoft and Google both have IPv6 addresses published for their MX
IP reputation scoring is feasible with 4.3 billion IPv4 addresses.
That model breaks down when you’re dealing with 340,282,366,920,938,463,463,374,607,431,768,211,456 possible IPv6 addresses.