Why Email Deliverability is a Core SRE Metric: Lessons from the Presis & PowerDMARC Case Study

In a recent case study published by Macau Business, Managed Service Provider (MSP) Presis shared how they partnered with PowerDMARC to significantly improve email deliverability and domain security for their clients. By enforcing strict DMARC, SPF, and DKIM protocols, they successfully mitigated spoofing and ensured critical transactional emails reached their targets.

The SRE Angle: Email as Critical Infrastructure

For SREs and DevOps engineers, email deliverability is often treated as an 'office IT' problem rather than an operational engineering metric. This is a dangerous oversight. Transactional email pipelines are critical for:

• Automated alerting and paging alerts from tools like PagerDuty or custom internal scripts.
• Password resets, security tokens, and user onboarding pipelines.
• Automated billing and system outage notifications.

If your DNS records drift or if someone unauthorized modifies your TXT records, your DMARC alignment will break. This causes mail servers to silently drop your alerts or route them straight to spam, resulting in catastrophic communication failures during an incident.

Proactive DNS Monitoring with Domain Audit HQ

To keep your core infrastructure safe, manually checking SPF, DKIM, and DMARC TXT records isn't enough. System administrators need continuous monitoring to catch configuration drift before mail servers begin rejecting critical payloads.

This is where Domain Audit HQ by Rabbit SaaS steps in. It provides proactive monitoring of your domain expiration, DNS health, and WHOIS updates. If a DNS zone file change inadvertently breaks your DMARC policy or invalidates an SPF record, Domain Audit HQ alerts your DevOps team instantly—saving your deliverability rate, your domain's sender reputation, and your system alert pipelines.