In early 2024 and throughout 2025/2026, Google and Yahoo instituted stringent deliverability enforcement for bulk senders. If your DNS records and ramp schedules are not properly configured, even the most compelling copy will go straight to the spam graveyard.
The Technical Holy Trinity: SPF, DKIM, DMARC
SPF (Sender Policy Framework) specifies which mail servers are authorized to send email on behalf of your domain.
DKIM (DomainKeys Identified Mail) provides an encrypted cryptographic signature proving the message was not altered in transit.
DMARC (Domain-based Message Authentication) instructs receiving servers how to handle emails that fail SPF or DKIM checks (p=quarantine or p=reject).
Pro Tip: Never use your primary company domain for outbound prospecting. Always warm secondary sending domains for 21-30 days prior to launch.
Warm-up Protocols and Natural Ramp-Up
Never send high volume from a fresh domain. Maintain a 3-4 week gradual ramp cycle with high engagement reply rates before initiating active campaigns.
What to implement immediately
Related playbooks & guides
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