New Google Postmaster Tools Deliverability Analysis Feature Update
News
Updated on 14 Aug 2026: We added Google's reporting scope and status timing to sharpen verdict troubleshooting.
Google has added a Deliverability analysis section to Postmaster Tools. It turns Gmail signals such as spam rate, sender compliance, SMTP errors, message volume, and user feedback into plain-language verdicts with recommended actions.
The change gives senders a clearer way to use Postmaster Tools. SPF, DKIM, and DMARC compliance is the baseline. The verdicts push senders to prove that recipients consistently want the email and that sending behavior stays stable over time.
The UI goes beyond a raw metric. It gives a status, a plain-language reason, and a recommended action. That makes the update useful for marketers, lifecycle teams, and technical operators who need a shared view of Gmail deliverability problems.
What changed in Postmaster Tools
Google Postmaster Tools Deliverability analysis section showing status, description, and recommended action.
The section appears inside Postmaster Tools and sits on top of the same Gmail-only reporting model covered in the Postmaster Tools v2 guide. Instead of forcing you to inspect separate panels and infer what Gmail cares about, Deliverability analysis gives a named reason and a recommended fix.
The Postmaster Tools API v2 enum exposes eight entries. Seven are actionable deliverability reasons and one, REASON_UNSPECIFIED, is a technical fallback. The UI adds descriptions and Recommended action text, which is the practical part for day-to-day operations.
How the new verdicts read
The status is not only a metric label. It groups Gmail signals into a sender verdict.
Positive
USER_FEEDBACK_POSITIVE
Users show they want the mail.
Neutral
USER_FEEDBACK_LOW or MESSAGE_VOLUME_LOW
Gmail sees low signal or too little volume.
Negative
Four active negative statuses
Complaints, compliance gaps, or delivery errors are high.
The main operational change is that the verdicts do not reward technical setup by itself. A sender can pass authentication and still get a negative verdict if users complain, ignore the mail, or if SMTP behavior looks unstable after a volume change.
What each Deliverability analysis status means
The API documents seven actionable reasons plus REASON_UNSPECIFIED. The table translates each value into a troubleshooting starting point.
|
|
|
|
|---|---|---|---|
USER_FEEDBACK_POSITIVE | Positive | Users want the mail | Keep cadence stable |
USER_FEEDBACK_LOW | Neutral | Users do little with messages | Improve relevance |
MESSAGE_VOLUME_LOW | Neutral | Not enough outgoing mail | Wait for signal |
USER_FEEDBACK_NEGATIVE | Negative | Users reject the mail | Fix list quality |
SENDER_NOT_COMPLIANT | Negative | Requirements are unmet | Review compliance |
SMTP_ERRORS_HIGH | Negative | Delivery errors are high | Check infrastructure |
SPAM_RATE_HIGH | Negative | Above 0.1 percent | Lower complaints |
REASON_UNSPECIFIED | Fallback | No reason returned | Recheck later |
Google Postmaster Tools Deliverability analysis statuses.
User feedback negative needs list work
USER_FEEDBACK_NEGATIVE is not only about a visible complaint rate. It can appear when users frequently report inbox messages as spam or do not rescue spam-folder messages by marking them as not spam.
- Frequency: Reduce sends to people who have stopped opening, clicking, buying, replying, or otherwise showing intent.
- List quality: Remove stale, imported, purchased, role-based, and unclear-consent addresses before testing more content changes.
- Feedback loop: Use Gmail's Feedback Loop data where available, then map spikes back to the campaign, segment, and sender.
SPAM_RATE_HIGH has an explicit threshold: spam rate above 0.1 percent. The visible rate counts DKIM-authenticated messages delivered to engaged users' inboxes and then marked as spam. Messages moved out of Spam by recipients also count toward inbox delivery. Keep the rate below 0.1 percent and avoid reaching 0.3 percent, rather than treating 0.09 percent as a universal safe zone.
How reporting scope and delay affect the verdict
Deliverability analysis sits under Compliance status, so its verdict must be read within that dashboard's scope. The data covers mail sent to personal Gmail accounts. Compliance status is reported for the primary domain, while traffic from its subdomains contributes to that primary-domain result.
- Allow for delay: Dashboard data usually updates within 24 hours, but compliance uses a rolling average and recovery can take up to seven days to appear.
- Account for low volume: Privacy thresholds can hide data on low-volume days. MESSAGE_VOLUME_LOW means Gmail lacks enough evidence, not that the domain has failed.
- Trace subdomains separately: A primary-domain verdict can be influenced by a subdomain, so separate each sending stream before changing the whole program.
- Expect metric differences: Compliance status and individual dashboards use slightly different datasets, so their results do not always move together.
A very low spam rate can mislead
Postmaster Tools reports spam complaints from messages that reached the inbox. If Gmail already sends a large share of mail to Spam, fewer recipients can report those messages from the inbox. A rate that drops sharply or disappears after a poor period does not prove recovery.
Why the new verdicts matter
Infographic showing authentication, user feedback, spam rate, and SMTP errors feeding into a Gmail verdict.
Before this update, many teams treated Postmaster Tools as a set of separate charts. They checked authentication, checked spam rate, then argued about which chart mattered most. Deliverability analysis reduces that ambiguity by giving Gmail's own summary of the problem.
Old reading
- Metric chasing: Teams inspected spam rate, auth, and delivery errors separately, then guessed the main issue.
- DNS focus: Passing SPF, DKIM, and DMARC often became the finish line instead of the starting point.
- Slow triage: Marketing and engineering teams needed extra translation before deciding what to change.
New reading
- Verdict first: The UI names the main deliverability condition and explains it in plain language.
- Behavior focus: User feedback, complaints, rescue behavior, and sending stability now sit closer to the decision.
- Action path: Recommended actions point teams toward frequency, list quality, compliance, or infrastructure.
This also changes how to diagnose sudden complaint movement in the spam rate dashboard. A spike still matters, but the Deliverability analysis label tells you whether Gmail sees that spike as a complaint problem, a broader compliance problem, or part of an SMTP reliability issue.
How to investigate a negative verdict
A negative Deliverability analysis status should start a structured investigation. Do not make a broad content change first. Find the exact sender, campaign, list, or infrastructure event that moved the Gmail signal.
- Confirm compliance: Check SPF, DKIM, DMARC, TLS posture, DNS consistency, message formatting, and unsubscribe handling. Suped's domain health checker is a fast way to catch obvious record gaps.
- Isolate sources: Separate transactional mail, marketing mail, product notifications, and third-party senders before judging the whole domain.
- Read engagement: Compare the complaint window against send frequency, suppression rules, inactive users, and new acquisition sources.
- Inspect errors: For SMTP_ERRORS_HIGH, check for volume jumps, deferred mail, queue buildup, DNS timeouts, and provider-side throttling.
- Test mail: Send a real message through Suped's email tester to inspect authentication, headers, and content-level issues before the next campaign.
- Track recovery: Watch the status over multiple sends and allow up to seven days for compliance changes to appear. One quiet day does not prove recovery.
Baseline DNS records to verifydns
v=spf1 include:_spf.example.net -all selector1._domainkey TXT "v=DKIM1; k=rsa; p=PUBLICKEY" _dmarc TXT "v=DMARC1; p=none; rua=mailto:dmarc@example.com"
The status is not always the metric name
A domain that appears likely to show SPAM_RATE_HIGH can instead show SENDER_NOT_COMPLIANT. Treat the label as Gmail's chosen explanation, not a one-to-one mirror of the chart that looks worst.
Where Suped fits in the workflow
Postmaster Tools tells you what Gmail thinks about your primary domain. Suped's product helps connect that verdict to an authenticated sender and a specific fix. That difference matters because Gmail's panel does not identify the campaign, sending platform, or source behind the verdict.
Issue steps to fix dialog showing the issue overview, tailored fix steps, and verification action
In Suped, the practical workflow is to monitor DMARC monitoring data, verify which sources pass SPF and DKIM, watch for authentication drift, and act when alerts show rising failures. If Gmail shows SENDER_NOT_COMPLIANT, that source-level view helps narrow the issue before tracing DNS and headers across every sender.
Suped can pair authentication results with blocklist monitoring so teams can check whether blocklist (blacklist) symptoms appear near a Gmail verdict change. That context is useful after adding a sending source or changing DNS.
A practical pairing
Use Postmaster Tools for Gmail's verdict. Use Suped's DMARC reports and alerts to identify the sending source, verify authentication, and track the fix.
Limits and caveats
Deliverability analysis is helpful, but it is not a full inbox placement system. It covers mail to personal Gmail accounts, not how non-Gmail inbox providers treat the same mail. It also does not show the exact campaign or list segment that caused the verdict.
What it gives you
- Gmail verdict: A named status that explains the current Gmail deliverability condition.
- Plain language: A description that non-technical stakeholders can understand without reading DNS records.
- Recommended action: A starting fix path for frequency, list quality, compliance, or SMTP reliability.
What it does not give you
- Cross-inbox view: It does not explain how non-Gmail inbox providers are treating your mail.
- Source split: It does not identify the exact sending platform, campaign, subdomain, or list.
- Perfect mapping: It does not always name the metric that appears most visibly wrong in the dashboard.
That last limitation matters for non-compliance cases. A domain can show no visible user-reported spam problem and still receive a compliance verdict if another requirement is failing or Gmail's classifier chooses a broader reason.
What to do next
Deliverability analysis makes Postmaster Tools more useful because it says what Gmail thinks the sender problem is. Treat the verdict as a prioritization signal, not as the whole investigation.
If the status is positive, keep authentication, cadence, and list hygiene stable. If it is neutral, build more consistent signal before changing everything at once. If it is negative, start with the recommended action, then verify the sender source in DMARC reports, the real headers, the affected segment, and any infrastructure event around the send.
Gmail is checking whether mail meets its sender requirements and whether recipients want it. Consistent sending behavior matters after authentication passes.
