Deliverability Engineering Audit

deliverability-engineering · v1.1.0 · paid

Comprehensive deliverability audit covering DNS authentication (SPF, DKIM, DMARC), IP/domain warm-up automation, sending reputation management, ISP-specific throttling, and bounce/feedback loop processing for email campaign systems.

DNS Authentication

dns-auth · weight 0.25

SPF record generation or validation in code
ab-000925
critical
DKIM key rotation mechanism — not hardcoded
ab-000926
critical
DMARC policy at quarantine or reject in production
ab-000927
critical
Return-Path aligned with From domain
ab-000928
high
BIMI record support
ab-000929
info

Warm-Up & Reputation

warmup-reputation · weight 0.25

Automated warm-up schedule with daily volume ramp
ab-000930
high
Per-domain and per-IP reputation tracked separately
ab-000931
low
Reputation monitoring integration
ab-000932
high
Complaint rate alerting at threshold of 0.1% or less
ab-000933
medium
Reputation history stored for trend analysis
ab-000934
low

Sending Throttling

sending-throttling · weight 0.2

Per-ISP rate limits enforced
ab-000935
high
Adaptive throttling on 4xx SMTP responses
ab-000936
high
Burst detection and volume smoothing
ab-000937
low
Per-campaign rate limits configurable
ab-000938
low
Global system rate limit as safety net
ab-000939
low

Bounce & Feedback Loops

bounce-fbl · weight 0.2

Hard bounce results in immediate permanent suppression
ab-000940
high
Soft bounce tracking with escalation to suppression
ab-000941
high
Bounce categorization beyond hard and soft
ab-000942
medium
FBL processing automated
ab-000943
high
Bounce and complaint rates monitored per campaign and per sending domain
ab-000944
low

Domain & IP Strategy

domain-ip-strategy · weight 0.1

Sending domain isolated from corporate domain
ab-000945
high
Marketing and transactional email separated across IPs or subdomains
ab-000946
low
IP pool management for high-volume sending
ab-000947
low
DNS records version-controlled
ab-000948
info