Coincidentally I'm writing a blog post about this (not ready yet).
* Domain Takeover
* Infrastructure Takeover
* Sending vs receiving
If somebody takes over your domain they can change host addresses as well
as MX hosts and SPF.
Most of our efforts are focused on receiving mail, but it's worth noting
that if a recipient has been subject to a DNS takeover you could send mail
to the bad guys, and maybe they're polite enough to forward it on to the
intended recipients after review/edits.
--
Fred Morris, internet plumber
On Thu, 14 Nov 2024, Steffen Nurpmeso via Postfix-users wrote:
I have a somewhat hard time understanding why greylisting shall be
useful for known domains, unless (maybe) these are somewhat
top-level ones?
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