Hi, Experts. I've been seeing something new in the world of phishing emails (at least, to me). The email comes from "firstname.lastname@example.org" -- and the routing headers bear out that this email actually came from "somedomain.com." I am used to seeing a spoofed address and routing from obscure servers that bear no relation to that domain.
Is this a new kind of spoof? Are they actually spoofing routing? Or am I seeing the work of a botnet of some kind? Should I be alerting the sending domains?