Rules break at edge cases; agents can handle them, as long as they operate inside guardrails and log their decisions.
The metrics that matter#
- Authentication pass rate: share of mail passing SPF, DKIM, and DMARC alignment. Healthy: 99% or higher.
- Spam complaint rate: Gmail enforces at 0.3%; stay under 0.1%.
- Hard bounce rate: under 2%; above 5% triggers platform reviews.
- Inbox placement: above 90% across major providers via seed tests.
- Engagement: click and reply rates by segment; opens are unreliable after Mail Privacy Protection.
Where to read them#
- Google Postmaster Tools for Gmail domain reputation, spam rate, and authentication.
- Microsoft SNDS and JMRP for Outlook.com IP reputation and complaints.
- Your ESP's delivery and bounce reports.
- DMARC aggregate reports for authentication by source.
Improving the numbers#
- Start with agent-assisted, not agent-autonomous: the agent proposes, a human approves.
- Give agents structured tools (send, schedule, tag) rather than free-form access.
- Define hard limits: daily send caps, forbidden claims, protected segments.
- Measure agent decisions against a control group before expanding autonomy.
Frequently asked questions#
Can AI replace marketing automation platforms?
Not yet. Agents work best as a decision layer over a reliable delivery and consent platform.