We are trying to setup SPF for a number of clients, but we're not 100% sure what we need to configure to only accept the senders email.
I understand that SPF is a service that blocks spam/spoof emails from senders who pretend they are someone else.
What is the best practice or recommended approach in setting up SPF? Is it best to setup to include mx, ptr, ip, a etc? Or is there another way?
We want to setup so it doesnt disrupt or hinder in any way shape or form between companies.
Apologies in advance, my knowledge is quite basic when it comes to SPF.