[AusNOG] Rise in fake calling numbers?

[Matt Hare]

SPF / DKIM for phone calls? That would be great, but what about calls that
are forwarded by systems that originate from a third party, you want to
maintain the original CLID during forwarding so you overstamp it to the
outbound call as it's forwarded. With email forwarding addresses, this
sometimes leads to SPF issues unless the smtp.mailfrom is set to something
other than the original sender's address. Not sure if the same could be
implemented for voice comms.
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