I currently have an unbound server.However, with some mail providers using the
"exists:" mechanism and returning 127.0.0.1, this obviously triggers a DNS
rebinding protection and SERVFAIL.This ultimate leads to an SPF rejection.Is
there any way to configure unbound, such as so if the rebinding protection
trips, it will instead return a non-routeable bogus IP like "192.0.2.123"
(documentation only) which both ensures the "exists:" mechanism works as
intended, but also protects the localhost if a malicious actor were to do a
rebinding attack..Im thinking of excluding 127.0.0.0/8 from private adress, and
then use some sort of rewriting mechanism if this exists in unbound?
