Is there a way to diagnose which Header Name triggers it? How can I tell which one is it?
The list of Headers:
Received:
DKIM-Signature:
X-CSE-ConnectionGUID:
X-CSE-MsgGUID:
Message-Id:
X-Amp-Result:
Received:
F…..., control characters, spaces, or other non‑ASCII symbols)...exception for each line. This will reveal the exact line that triggers...