Guide
How to investigate bounce-rate changes
Connect a bounce rate increase to the underlying infrastructure change that caused it.
The situation
A sudden increase in bounce rates almost always has a root cause — and that root cause is often an infrastructure change. Authentication failures, blacklist listings, or DNS modifications can cause receiving servers to start rejecting messages that were previously delivered.
Before you begin
The operational path
The goal isn't just to find the error. The goal is to move from detection to a verified infrastructure state.
What could have caused this?
Cause
What changed
Possible impact
Authentication failure
SPF, DKIM, or DMARC changed or broken
Messages rejected or quarantined
Blacklist listing
Domain or IP listed
Messages rejected by recipient servers
DNS change
MX or other record modified
Routing or authentication disrupted
Step by step
Identify when the bounce rate started increasing and use that date to narrow the investigation.
What to check
Check Infraova's change timeline around the date the bounce rate increased.
What to check
With Infraova
Infraova's change timeline gives you a precise before-and-after record of every DNS change — so you can connect an infrastructure change to a deliverability event by date.
Run a fresh authentication audit to confirm SPF, DKIM, and DMARC are currently passing.
What to check
If the bounce increase is widespread, a blacklist listing may be the cause.
What to check
Once the root cause is identified, move it through the remediation workflow.
What to check
You decide. Infraova executes.
Infraova can propose and execute an approved infrastructure change, but it does not independently decide to modify client infrastructure. Every proposed change requires explicit authorization before execution.
Key takeaway
A bounce rate increase is a symptom. The cause is almost always an infrastructure change. Use the change timeline to find it, fix it, and verify the result.
Turn this playbook into a continuous workflow
Without Infraova
With Infraova
The guide teaches you how to solve the problem once. Infraova keeps watching for it after you're done.
Continue the playbook
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