Cold Email Deliverability Infrastructure: SPF, DKIM, DMARC & BIMI Setup
Engineering Review: LiveLeads4Less Pipeline Directorate
Google and Yahoo enforce strict spam thresholds (< 0.3%). Maintaining primary domain reputation requires architecting secondary outreach domains with hardened DNS authentication.
1. DNS Authentication Records Spec
🔒 RFC-Compliant Outreach DNS Configuration
# SPF Record (Hard-fail configuration)
v=spf1 include:_spf.google.com -all
# DMARC Record (Enforcement policy with reporting)
v=DMARC1; p=reject; rua=mailto:dmarc@liveleads4less.com; pct=100; adkim=s; aspf=s