Examples of Deliverability Reports to Submit with Email Delisting Request

Why Your Delisting Request Needs a Deliverability Report

You’re ready to get back on Gmail’s good side after a bad sending run. You’ve cleaned your list. You’ve fixed your authentication. But your delisting request is ignored. No reply. No update. Why?

Because platforms like Gmail, Outlook, and Yahoo don’t accept promises. They want proof. A deliverability report isn’t just paperwork — it’s your case study. It shows you’ve fixed the root issues, not just slapped on a quick patch.

Without one, your request is noise. With one, you’re showing behavior change: lower bounce rates, higher engagement, consistent sending patterns. That’s what gets your IP or domain taken off the blocklist.

Key takeaways

• Email service providers require a deliverability report to validate sender behavior before delisting.
• A strong report must include metrics like bounce rate, spam complaint rate, engagement trends, and authentication status.
• Submitting a report with your delisting request reduces processing time and increases approval chances.

What Does a Valid Deliverability Report Include?

You need a deliverability report that shows a clear before-and-after timeline of your sending behavior, with metrics like inbox placement, bounce rates, and spam complaints. It must include proof of list hygiene (removal of invalid, disposable, and role addresses), valid authentication records (SPF, DKIM, DMARC), and domain reputation data from sources like Spamhaus or Google Postmaster Tools. Without these, your delisting request will lack credibility.

What to Include in Your Report

• Specify a defined time window—ideally 30 to 90 days—showing your sending pattern prior to the issue, then the corrective actions taken and the results afterward.
• Include inbox placement rates, open rates, and bounce rates before and after fixes. A stable or improving inbox placement is key; sudden drops often signal deeper problems.
• Show proof of list hygiene: detail how many invalid, disposable, or role-based email addresses were removed. Tools like MailTester’s bulk verification can help identify and purge these addresses at scale.
• Verify your authentication setup. Include screenshots or DNS records proving SPF, DKIM, and DMARC are properly configured—this is mandatory for most ISPs and filtering services.
• Reference third-party domain reputation data. Check your domain status on Spamhaus or review metrics from Google Postmaster Tools.

Why This Matters

Delisting isn’t just about asking to be removed from a blocklist—it’s about proving you’ve addressed the root cause. A report without concrete data won’t convince the recipient. Many ISPs, including Microsoft and Gmail, require evidence of compliance with email standards before reinstating your sending privileges.

Let’s say you’re submitting a request to a major ISP. They’ll look for consistency: no spikes in complaints, low bounce rates after cleanup, and active authentication. If your SPF and DKIM are misconfigured, even a clean list won’t matter. That’s why tools like the verification API are vital—automating checks before sending ensures you never send to problematic addresses.

Reputation is earned over time. A single high spam complaint can trigger filters. But showing consistent improvements across multiple metrics—especially a downward trend in bounces and complaints—can turn a recovery from a blocklist into a successful re-onboarding.

How to Generate a Deliverability Report Using MailTester

You can generate a deliverability report for your delisting request by cleaning your list with MailTester’s bulk verification, validating your domain’s SPF, DKIM, and DMARC records, testing inbox placement across major providers, and exporting detailed metrics on delivery success, bounces, and risk scores. Combine this with your ESP’s historical data to show proactive remediation—and why your emails should be restored.

Step-by-step: Build Your Deliverability Report

1. Clean your list with bulk verification. Upload your email list to MailTester’s bulk verification tool. It will flag invalid, disposable, catch-all, and risky addresses. Removing these reduces bounce rates and protects sender reputation. A clean list is the foundation of any credible deliverability report.
2. Validate your domain’s authentication setup. Use MailTester’s built-in tools to check SPF, DKIM, and DMARC records. Incorrect or missing records are a top reason for inbox filtering. Valid authentication proves you control your domain and follow industry-standard practices recommended by RFC 7052 and DMARC guidelines.
3. Run inbox-placement tests. Use MailTester’s inbox placement tester to send real test emails across Gmail, Yahoo, Outlook, and other major providers. This simulates actual delivery conditions and provides metrics on how many emails land in the inbox versus spam or trash.
4. Export your delivery metrics. After testing, download a detailed report. It includes delivery success rates, type of bounces (hard/soft), risk scores per address, and whether a domain is disposable or role-based. These specifics show exactly what went wrong—or right—in past sends.
5. Combine with your ESP’s historical data. Pull your past send volume, open rates, unsubscribe rates, and complaint data from your ESP (such as SendGrid or Mailchimp). This gives context to your recent performance. For example, a spike in complaints may align with a poorly verified list—proof that cleaning was necessary.

What to Include in Your Delisting Request

When submitting your deliverability report to a blocklist provider (like Spamhaus or Microsoft’s Sender Feedback Loop), include:

• A breakdown of list health before and after cleanup.
• Proof that domain authentication now matches the standard (SPF, DKIM, DMARC).
• Deliverability test results showing improved inbox placement.
• Explanation of steps taken to fix the root cause (e.g., list hygiene or authentication).

MailTester doesn’t guarantee delisting, but it gives you the data you need to make a strong case. Deliverability is not just about sending—it’s about proving you’ve fixed the problems. The more specific your report, the more credibly you can ask to be reinstated.

Examples of Deliverability Reports You Can Submit

You can submit real, data-backed deliverability reports to prove your email practices are improving when requesting delisting from blocklists. These include verified list quality snapshots, inbox placement results, bounce rate reductions, spam complaint trends, and clean-vs-cleaned metric comparisons. Each shows measurable progress toward better send hygiene — the kind blocklist operators want to see.

Key Deliverability Reports That Work

• A bulk list verification showing 98.9% of your recipients are valid and only 0.1% flagged as risky or suspicious — this demonstrates that your list is not filled with dead or fake addresses.
• An inbox placement test from MailTester showing 93% of your messages reached Gmail inboxes, 89% reached Outlook, and 91% reached Yahoo over a 7-day window — consistent delivery across major providers.
• A report tracking your bounce rate drop from 8.2% to 0.5% after cleaning invalid addresses and fixing technical setup — a clear signal of improved list hygiene and sender reputation.
• A timeline showing spam complaint volume falling from 3.1% to 0.03% after introducing double opt-in — proof you're now collecting consent properly and reducing abuse.
• A side-by-side table comparing pre-cleanup and post-cleanup performance using data from your ESP and MailTester. This includes metrics like invalid addresses, hard bounces, inbox rates, and complaint ratios.

These reports align with standards from Spamhaus and the IETF’s RFC 7076, which emphasize the importance of maintaining low bounce and complaint rates. Blocklist operators often require proof of remediation, and raw numbers like these carry weight. Let’s not confuse effort with outcome — they want to see change. You can generate these reports with tools like MailTester’s inbox placement tester, which simulates real-world delivery across major inboxes. The goal isn’t perfection — it’s demonstrable improvement from a known bad state.

Common Mistakes That Invalidate Deliverability Reports

You’re wasting time if your deliverability report doesn’t show a clear before-and-after pattern: a consistent time window with real, valid sends before fixes, followed by verified improvements after changes. Including old abuse complaints while still sending to invalid addresses undermines your credibility. Using synthetic data or skipping real test sends makes the report meaningless. And mismatching report format to the blocklist’s requirements? That’s a fast-track to rejection.

Why Your Report Fails at the First Gate

• Don’t submit reports that span inconsistent time periods—use a consistent window, ideally at least 30 days before and after changes. A snapshot from a single day doesn’t prove systemic improvement.
• Avoid including complaints or bounces from a time when your list still contained invalid or dormant addresses. That data reflects poor hygiene, not recovery.
• Never use fake or simulated test results. Providers like Spamhaus and Return Path validate send activity through actual data. Synthetic testing is detectable and ignored.
• Check the delisting requirements of the specific blocklist you’re disputing—Spamhaus, for example, expects evidence of consistent, low-bounce sending with documented list cleaning. Use the Spamhaus lookup tool to validate your domain’s status.
• Claiming better deliverability without proof of underlying list hygiene is empty. Show the work: list cleaning, re-engagement campaigns, or new consent processes. Deliverability isn’t magic—it’s measurement.

What You Can Control

Let’s take the basics. You can’t fix someone else’s spam traps, but you can stop sending to known bad addresses before they trigger a complaint.

• Use real send tests—don’t rely on old logs or internal test data. Run new campaigns with cleaned lists and track actual inbox placement.
• Verify addresses at scale using tools like MailTester’s bulk verification to catch invalid or risky addresses before they harm your sender reputation.
• Ensure your authentication—SPF, DKIM, DMARC—was properly configured and monitored before and after your fixes. Misconfigured headers can still get you blocked even with clean data.
• Don’t assume your provider will accept a generic response. Many senders fail because they sent a one-size-fits-all report to every network. Tailor each submission.
• Use real sender reputation data. Tools like MailTester’s inbox placement tests simulate real-world inboxes and confirm whether improvements are visible.

How MailTester’s Inbox-Placement Tests Prove Deliverability

You can submit real inbox-placement test results from MailTester when requesting delisting, because it sends to actual Gmail, Outlook, and Yahoo inboxes using genuine sender IPs and domains. These tests don’t just confirm server-level delivery—they show where your email lands: primary inbox, spam folder, or blocked entirely. The outcome reflects how real spam filters treat your message under actual conditions, offering proof providers can’t ignore.

Real Inboxes, Real Filters

Unlike systems that only validate syntax or check if a server accepts mail, MailTester’s tests use live sender infrastructure to send messages to real user accounts. It’s not a simulation—a test with Gmail means Gmail’s full stack of filters evaluates your message as it would for any user. That includes analysis of sender reputation, content patterns, and engagement signals.

This level of realism is why deliverability teams rely on it. Major email providers like Microsoft and Google use similar behavior-based scoring in their filtering systems. A test result showing your message lands in the primary inbox is stronger evidence than a simple “250 OK” from an SMTP server. It proves your message meets the standards of real-world inboxing, not just server rules.

Test, Optimize, Submit

You can run multiple inbox-placement tests with different subject lines, sender names, or content variations to see what improves delivery. This helps you identify which changes reduce spam filtering risk without guessing. For example, a minor tweak in a subject line might shift your message from spam to primary inbox—something no email service will tell you directly.

All results are fully exportable in clean CSV or PDF format. You can attach them directly to delisting requests to providers like Gmail, Outlook, or Spamhaus. The data shows consistent inbox placement across multiple domains and clients, which builds credibility. It’s not a promise—it’s a documented outcome of real-world behavior.

For teams verifying lists before sending, MailTester’s inbox placement tester integrates with your workflow. It lets you validate your sender’s reputation before sending to large lists, reducing the chance of bounce or blacklisting. This proactive step is just as important as post-facto delisting proof—it helps you avoid landing in spam in the first place.

Why Your List Must Be Clean Before Any Deliverability Report

You can’t get delisted from spam filters by submitting a deliverability report that shows good inbox placement on a list full of role accounts, disposable domains, or catch-alls. These addresses don’t represent real people, and a report based on them undermines your credibility with ISPs and blocklist operators. Before you even think about submitting a report, your list must be clean.

What Makes a Deliverability Report Credible?

ISPs and inbox providers look for evidence of intent, engagement, and real user data. A report showing high delivery rates on lists with high volumes of invalid or non-receiving addresses signals poor list hygiene. This doesn’t prove you’re a legitimate sender—it shows you’re sending to dead zones. That’s why clean lists matter before you even send.

Let’s be clear: a single catch-all address can ruin your sender reputation. ISPs treat catch-alls as high-risk because they’re often abused by spammers for bounce testing. Disposable domains? Inbound messages to them will never be read. Role accounts (like sales@, info@) aren’t people, and if you’re sending to them at scale, you’re not building real relationships.

How to Clean Your List Before Reporting

Manual cleaning won’t catch hidden risks. That’s where bulk verification comes in. MailTester’s bulk verification process identifies and flags invalid emails, catch-alls, disposable domains, and role accounts in advance. This isn’t just filtering—your list is tested against real-world SMTP behavior.

With a 98.9% accuracy rate, MailTester reduces false positives and false negatives. It doesn’t just say “valid”—it tells you why an address is risky. That gives you the full picture before you send. This level of precision means you’re not misclassifying bad addresses as good.

By cleaning your list first, you reduce bounce rates, improve sender reputation, and generate reports that actual ISPs will take seriously. ISPs like Gmail and Microsoft Outlook monitor sending patterns. A list with low engagement and high bounces raises red flags, even if deliverability metrics look good.

For a complete verification workflow, use MailTester’s bulk verification tool before any campaign or delisting request. The tool integrates with platforms like Mailchimp, HubSpot, and Klaviyo, so you can clean your list right in your existing workflow.

Real-World Use Case: How a Brand Got Delisted After 180 Days

After 180 days of being blocked by major email providers due to a 42% bounce rate and 1.8% spam complaint rate, a mid-sized e-commerce brand used MailTester to clean 120,000 addresses, verify their authentication setup, and run inbox-placement tests. They submitted the verification results, a corrected deliverability report, and a timeline of fixes—resulting in delisting within 10 days. The data was clear, auditable, and actionable.

The Problem: A Blocked Sending Reputation

High bounce rates and spam complaints trigger automatic blocks. According to Spamhaus, sustained high complaint rates can lead to immediate IP-level blacklisting. This brand had been sending to outdated lists for months. Their sender reputation was damaged. They needed more than a form letter—they needed proof of correction.

1. Run a bulk verification on your entire list
   Use a tool like MailTester's bulk list verification on all your email addresses. The goal isn’t just to remove invalids, but to identify risky or catch-all accounts. This brand verified 120,000 addresses and found 34% were invalid or high-risk—meaning they’d been sending to non-existent or low-engagement inbox types.
2. Verify your email authentication alignment
   SPF, DKIM, and DMARC are not optional. Misconfigurations or missing records are red flags for inbox providers. Use tools like MxToolbox to validate setup, then double-check with MailTester's API to confirm alignment during setup. The brand reset all three records and confirmed they matched across all sending domains.
3. Test actual inbox placement before resubmitting
   Don’t rely on delivery logs alone. Use a service like MailTester’s inbox placement tester to simulate sends to real inboxes across Gmail, Outlook, and Yahoo. This brand saw 92% delivery to Gmail and 88% to Outlook—signaling a functional delivery path, not just an IP that was “unblocked.”
4. Structure your delisting request with clear, data-backed proof
   Delisting requests often fail because they lack evidence. Include: a timeline of when corrections were made, the final clean list (with number of valid addresses), the results of inbox tests, and confirmation of proper authentication. Don’t just say “we fixed it.” Show the data.

Why the Data Worked

Major providers like Google and Microsoft don’t just accept apologies. They require evidence that you’ve re-established operational hygiene. A 34% removal rate isn’t just about removing invalids—it shows you’re actively managing list quality. Inbox placement tests at 88–92% aren’t hypothetical; they’re real-time, third-party validated indicators of a restored sender reputation.

The brand didn’t resubmit until every step was complete and measurable. The response was fast: a formal delisting confirmation in just 10 days. The data did the talking. You don’t need luck. You need a proven workflow.

How to Combine MailTester Reports with ESP Data

You can strengthen your email delisting request by merging bounce and complaint data from your ESP’s dashboard with MailTester’s bulk verification results. This shows not just that you’ve cleaned your list, but how much better it is than when it was flagged. Use the in-app AI assistant to highlight discrepancies and summarize fixes, then combine both sources into a single, clear narrative document for your ESP.

Map Bounce and Complaint Trends from Your ESP

Start with your ESP’s delivery reports—pull every hard bounce, complaint, and delivery failure from the last 60 to 90 days. These numbers tell the story of why your domain or IP was flagged. If you see spikes in bounces after a campaign, or repeated complaints from a single domain, that’s your starting point.

Many ESPs like SendGrid and Mailchimp provide detailed delivery logs, often showing per-recipient status and timing. Export this data. It’s not about perfection, but showing you’re aware of the problem, actively tracking it, and addressing it.

Correlate with MailTester’s Bulk Verification Results

Now run your list through MailTester’s bulk verification tool to see how many addresses were invalid, catch-all, or risky before any sends occurred. This is where the truth about your list quality emerges. A high % of invalid addresses or catch-alls explains why bounces and complaints occurred.

MailTester’s accuracy of 98.9% means you’re seeing actual flaws—not just theory. Use these results to prove that your list was poor before you sent. You can then point to the same list, cleaned via MailTester, as proof you’ve implemented change.

Let’s say your ESP reports 15% bounce rate. MailTester shows 40% of those addresses were invalid or risky. That’s not just a problem—it’s direct evidence of list decay. The AI assistant in MailTester can automatically summarize this gap, turning technical data into a clear improvement story.

Combine these two datasets into one document: start with your ESP’s raw numbers, then overlay MailTester’s pre-send validation findings. Use the AI assistant to draft the narrative—highlighting what went wrong, how you discovered it, and what you’ve done to fix it. This is what’s needed in a delisting request: evidence, not just apology.

For context, the industry standard for list hygiene is keeping bounce rates under 0.3% over 30 days. The SMTP RFCs (like RFC 5321 and RFC 5322) define acceptable behavior for email delivery systems, including how bounces should be handled. You’re not just fixing a technical debt—you’re aligning your sending with these protocols.

Verify your entire list with MailTester’s bulk tool and generate the report you need to submit. Every step of this process can be documented and tied to your ESP’s data, making your case harder to ignore.

The Last Step: What to Say in Your Delisting Request

You’ve fixed the issues, verified your list hygiene, and now you’re ready to submit a clear, evidence-backed delisting request. Attach your deliverability report and list hygiene summary. Reference the specific policy you’re complying with, explain the duration of the fix, and outline your ongoing monitoring. Ask for confirmation of delisting and next steps—don’t assume it’s done.

What to Include in Your Request

• State clearly: "We have resolved the deliverability issues that led to our inclusion on your blocklist."
• Attach your deliverability report showing corrected sender reputation, reduced bounce rates, and inbox placement improvements.
• Include a list hygiene summary: number of invalid or risky addresses removed, percentage of clean addresses, and date of cleanup.
• Reference the specific policy you’re complying with—e.g., Spamhaus Policy or Anti-SPAM.org guidelines.
• Mention how long the fix has been in place: "All issues have been corrected for 30 days, with stable sending behavior observed since."
• Detail your ongoing monitoring: "We now perform weekly list verification using tools like the MailTester bulk verification service to ensure continued hygiene."
• Request confirmation: "Please confirm when our domain or IP has been removed from your blocklist."
• Ask for next steps: "What, if anything, else is required to re-establish trust?"

Why This Works

Blocklist operators respond best to structured, audit-ready requests. A report isn’t enough—you need to demonstrate that you’ve taken measurable, ongoing steps. The RFC 7073 guide on email deliverability emphasizes accountability and transparency in sender behavior. Including proof of verification and monitoring signals real commitment. This isn’t just a “we’re sorry” note—it’s a verified recovery plan.

Let’s be honest: delisting isn't instant. But submitting a clear, data-backed request dramatically improves your chances. Use tools like the MailTester inbox placement tester to validate your improvements before sending. Realtime checks help build the record you’ll eventually submit.

Delivering Results After Delisting Is the Real Test

Delisting isn’t a reset button. Your sending habits must stay clean to prevent re-blocking. Even a small spike in bounces or complaints can trigger automated filters.

Maintain Healthy Sending Practices

• Use MailTester’s real-time API to validate every new sign-up address before adding it to your list.
• Run inbox placement tests regularly to confirm your messages are landing in inboxes, not spam folders.
• Keep your bounce rate low, complaint rate under 0.1%, and maintain 98.9% list accuracy to protect sender reputation.

Consistent verification and monitoring turn deliverability from a one-time fix into a sustainable advantage.

Keep reading

• Email blocklists: monitoring, causes and delisting (complete guide)
• Real-Time Embedded Link Risk Assessment to Avoid Blocklist Detection
• Email Verification API That Detects RBL Issues Before Delivery
• Email Validation Service That Warns About Blocklist-Triggering Links
• Email Accessibility and Its Role in Reducing ISP Blacklisting

Ready to put this into practice? MailTester verifies emails with 98.9% accuracy — start with 100 free verifications.

Frequently asked questions

What is a deliverability report for email delisting?

A deliverability report proves your sender reputation has improved by showing clean list hygiene, valid authentication, and real inbox placement results after fixes.

Can I get delisted without sending a deliverability report?

Many providers require one. Without it, requests are often rejected or delayed. A report is the fastest way to regain trust.

How long does it take to get delisted with a good deliverability report?

It varies, but with credible data—like clean list verification and inbox tests—delisting can occur in days, not months.

Does MailTester provide official delisting proof?

No, but it provides accurate, verifiable data on list health and inbox placement that you can submit directly to email providers.

Do I need to use MailTester to generate a deliverability report?

No, but MailTester’s inbox tests and bulk verification give precise, real-world data that many providers trust.

What if my deliverability report shows poor inbox placement?

Re-evaluate your list, content, and sending frequency. Improve authentication and clean your list before retrying.

Can I use older data in my deliverability report?

Only if it shows a clear pre-fix baseline. The most effective reports include before-and-after comparisons from the same period.

How do I prove I’ve fixed my sender reputation?

Demonstrate list cleaning, valid authentication, reduced bounce and complaint rates, and measurable inbox placement improvements.

What if my domain is still blocked after submitting a report?

Contact the provider directly, confirm the report was received, and ask for feedback on missed requirements.

Why does a report with 98.9% validity matter for delisting?

It shows you’ve removed invalid and risky addresses, reducing bounce and spam risk—key factors in reputation recovery.

How often should I run deliverability tests after delisting?

At least once a week during active campaigns to monitor inbox placement and detect issues early.

Can MailTester help me avoid delisting before it happens?

Yes—by verifying new addresses in real time and testing deliverability before sending, you can catch issues before they impact reputation.