SPF / DKIM / DMARC
also email authentication · SPF · DKIM · DMARC
Three DNS-based email authentication standards that verify a sender is authorized for a domain, sign messages to prove they weren't altered, and tell receivers how to handle failures.
Analogy
Like a sealed envelope with a verified return address and a rulebook telling the post office what to do if it looks forged.
Why it matters
Configuring these on a sending domain is what keeps your GHL email automations out of spam and landing in the inbox.
In practice
You add SPF, DKIM, and DMARC records to a client's domain DNS so emails sent from GHL pass authentication.