On 3 Jan 2020, at 8:02, Kris Deugau wrote:
I have a local rule adding a couple of points for anything coming
direct-to-MX from any Amazon compute node, period.
⋮
Reality has intruded and there are in fact static IP assignments in
the .compute.amazonaws.com tree (as well as ISP customers of ours who
have websites with webforms on AWS, which send mail to their ISP
mailbox - or sometimes their domain mailbox that's hosted with us) -
otherwise I'd have scored the rule a lot higher.
AWS offers the option to customize the PTR for elastic IPs. I very
rarely see spam coming in from AWS ranges, having non-default PTRs. I
use this to dial back my scoring a bit.
Best regards
-lem
