On Wed, May 9, 2018 at 7:03 AM, <[email protected]> wrote: > > dcsactrans2.verizon.com > > The hostname is invalid. >
I'm curious what your FP rate is on this strict checking of the HELO host name. I don't believe any of the major inbox providers do it, which should be a clue it is not very accurate of a signal.
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