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Hi everyone,
We have added the ip4:52.212.19.177 on the SPF of the customer's domain, and since then no more unverified emails appeared.
I'm pretty confident this is a problem with the domain spfa.cpmails.com propagation and or response throughout DNS. I am trying to address this issue with Check Point TAC, but in the meantime this seems to be a valid fix.
Thanks once again to @ToffenDask, definitely helpfull to know we were not the only ones experiencing this.
Regards
Rafael Santiago
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