Amazon SES vs SendGrid Deliverability Monitoring Dashboards in 2026

Why Your Deliverability Dashboard Isn’t Showing You the Full Picture

You’re seeing 99% delivery rates in Amazon SES and SendGrid. The reports say everything is fine. But your open rates aren’t moving. Your engagement is low. What’s missing?

Both Amazon SES and SendGrid track SMTP-level events—delivered, bounced, reported as spam. That’s useful. But it doesn’t tell you whether your email landed in the primary inbox or was quietly filtered to spam. A success rate doesn’t mean a single person opened your message.

Think of it like a shipping truck: the system confirms the package was delivered to the warehouse. But it doesn’t say if the customer ever saw it or if it ended up in a forgotten storage unit. That’s the gap.

Amazon SES vs SendGrid deliverability monitoring dashboards give you the “what happened” but not the “what matters.” You need visibility into inbox placement—because even perfect delivery doesn’t drive results if the email never gets seen.

Key takeaways

• Amazon SES and SendGrid track SMTP-level events, not inbox placement, leaving a blind spot in deliverability analysis.
• High delivery rates (e.g., 99%) do not guarantee emails reach the primary inbox or drive engagement.
• True deliverability requires testing inbox placement with tools that simulate real-world filtering, not just relying on platform dashboards.

What Amazon SES’s Virtual Deliverability Manager Actually Tracks

Amazon SES’s Virtual Deliverability Manager (VDM) tracks sender reputation, complaint rates, and feedback loop data via AWS CloudWatch and SES console logs. It alerts you to spikes in bounces or complaints—key indicators of domain health—but only at the ISP level. It doesn’t test actual inbox placement in Gmail, Outlook, or Yahoo; instead, it assumes that compliance with best practices means deliverability. Without real inbox testing, you’re relying on correlation, not proof.

What VDM Measures: Sender Health, Not Inbox Placement

Let’s be clear: VDM doesn’t tell you if your email lands in a user’s primary inbox. It monitors signals that *predict* deliverability issues. Think of it as a dashboard for compliance. It collects bounce types (permanent, transient), complaint rates, and feedback loop reports—data that ISPs feed back to you through AWS.

When your bounce rate spikes above 0.1%—a commonly cited warning threshold—VDM surfaces it with a red flag. But this is an ISP-level signal. It doesn’t validate whether your message is reaching the inbox or being filtered to Spam. According to Rspamd’s documentation, these metrics are used by major ISPs to build reputation scores, but they're not a substitute for actual delivery testing.

Why No Inbox Placement Testing Matters

Here’s the gap: VDM assumes that if you’re not being blocked, you’re delivering. But in reality, even compliant senders sometimes land in the spam folder. A study by Return Path found that up to 40% of emails from reputable senders still end up in spam or promotions tabs, even with solid infrastructure.

So while VDM shows you what’s happening at the delivery infrastructure level, it doesn’t measure the end user experience. That’s where inbox placement testing comes in. With tools like MailTester’s inbox tester, you can simulate delivery across Gmail, Outlook, and Yahoo with real inboxes. You’ll see exactly where your message lands—whether it’s in the primary tab or buried in clutter.

If you're relying solely on VDM, you're trusting the system to be enough. But deliverability isn’t just about avoiding blocks. It’s about staying in the inbox. For a full picture, combine VDM data with real inbox testing.

How SendGrid’s Deliverability Insights Reports Really Work

SendGrid’s Deliverability Insights dashboard shows bounce types, open rates, and spam complaint data—but only for emails where Internet Service Providers (ISPs) share feedback. It doesn’t confirm inbox placement, only whether SMTP delivery succeeded. You’re seeing post-delivery signals, not inbox visibility.

What the dashboard reports—and what it doesn’t

SendGrid collects delivery and engagement metrics like bounces, opens, clicks, and spam complaints through feedback loops (FBLs) with major ISPs like Gmail, Yahoo, and Outlook. But this data is only available when the ISP chooses to send it. Not all ISPs participate uniformly, so coverage varies. For example, you might see a high open rate but still not know if the email landed in a primary inbox or the promotions tab.

Deliverability Insights can’t distinguish between a delivered email in the primary inbox versus one sent to spam or promotions. The system knows SMTP delivery succeeded, but not whether the end user even saw it. ISPs report feedback, but they don’t publish a “primary inbox” flag. This means your metrics can look strong while inbox placement remains poor.

Why real-time visibility matters more than reports

Think of Deliverability Insights as a weather forecast: it tells you what happened after the fact, not whether your email actually reached the right place. You can see a 90% open rate, but without inbox placement testing, you can’t verify whether those opens happened because the email was seen or because it was filtered.

For a more accurate picture, use tools that test real inbox delivery. Tools like MailTester’s inbox placement tester can show you where your email lands across real user inboxes—including Gmail, Yahoo, and Outlook—before you send. Test your messages in real conditions, not just reports. This is how you catch issues before they affect engagement.

While SendGrid’s reports are helpful, they rely on ISP feedback that’s incomplete and delayed. For full control, combine them with real-time verification and inbox placement testing. That’s how you know whether your emails are actually landing where they need to—rather than just assuming they did.

The Hidden Limitation: Both Platforms Trust ISP Feedback — But ISPs Don’t Report Universally

You can’t fully trust the deliverability dashboards in Amazon SES or SendGrid because they rely on feedback from ISPs like Gmail, Outlook, and Yahoo — but these providers don’t share inbox placement or complaint data with most senders. Only a small fraction opt into official feedback loops, leaving the rest blind to actual delivery health.

Gmail's Feedback Loop Is Opt-In — And Rarely Used

Gmail’s Feedback Loop (FBL) is the most reliable source for complaint data, but it requires senders to manually enroll. According to Google’s documentation, only a small percentage of email senders participate. This means the majority of messages — even those marked as "delivered" — may still be landing in spam folders or being silently filtered out.

Outlook and Yahoo Have Limited Reporting, Often Through Third Parties

Outlook and Yahoo’s reporting is even less comprehensive. They don’t offer universal FBL access. Instead, some senders only learn about delivery issues through third-party blocklist monitoring tools like Spamhaus, or via indirect signals such as open rates and bounces. As a result, platforms like SES and SendGrid can show nearly perfect delivery metrics while actual inbox placement remains low.

Let’s be clear: a 98% delivery rate in your dashboard doesn’t mean 98% of recipients saw your email in their inbox. It means 98% of messages passed the SMTP handshake and were accepted by the receiving server. That’s not the same as “delivered to inbox.”

This gap exposes a core weakness in how both SES and SendGrid measure success. You’re trusting the ISP’s reported metrics — but they’re not complete, not consistent, and often not actionable without additional oversight.

That’s why real inbox placement testing, like the kind MailTester offers, gives you a practical check. For a fraction of the cost of a full campaign, you can test how your message appears across real inboxes, and catch issues before they hurt reputation.

Use a real inbox tester to see what’s actually happening — not just what the dashboards assume. Test your deliverability with MailTester’s inbox placement tool and get results that align with your actual audience.

How to Test Inbox Placement — The Only Way to Know If Emails Arrive

You need inbox placement testing to know if your emails actually land in real inboxes across Gmail, Outlook, Apple Mail, and others—not just in your sender dashboard. These tests use real email clients, real spam filters, and measure whether your message ends up in Primary, Promotions, or Spam tabs. This is the only way to see if your sender reputation, authentication, and content quality are truly effective in practice.

Why Inbox Placement Testing Beats Dashboard Metrics

Both Amazon SES and SendGrid provide real-time delivery dashboards, but they only track whether an email was accepted by the recipient’s mail server. That’s not the same as landing in a real user’s inbox. A message can pass authentication and be accepted by the MX server, yet still end up in Spam. Sender dashboards don't show that.

That’s why inbox placement testing simulates the actual journey of an email: it sends to hundreds of real inboxes across different providers, with different filtering behaviors. You’ll see if your email lands in the Primary tab (ideal), gets moved to Promotions (common), or is flagged as spam (a serious problem). This exposure reveals false positives—emails marked “delivered” in your dashboard that never really arrived where they mattered.

What This Testing Actually Measures

Inbox placement tests use a combination of known, clean email addresses and spam trap detection patterns across domains like Gmail, Yahoo, Outlook, ProtonMail, and Apple. Each test runs through real spam filters, not simulated ones. The result is a granular report showing exactly how your message was categorized across different clients.

For example, a message might pass SPF/DKIM checks perfectly, be accepted by the MX server, yet still be filtered into the Promotions tab due to content patterns or sender reputation. This kind of insight isn’t available from Amazon SES or SendGrid’s native dashboards—they only confirm acceptance, not real user visibility.

For teams doing bulk email campaigns, this test is critical. It’s the only way to avoid investing in high-volume sends that end up invisible to users. Tools like MailTester’s inbox placement tester run these checks at scale and highlight why an email might be flagged—even if your authentication setup looks perfect.

Learn more about testing your inbox placement with real-world data: see how it works.

How MailTester’s Inbox Placement Testing Reveals What SES and SendGrid Mask

You can’t trust AWS or SendGrid’s deliverability dashboards to tell you if your emails actually land in the inbox. Their metrics are based on server-level signals—like bounces and hard failures—while ignoring what really matters: whether your email lands in the primary inbox, spam, or gets blocked. MailTester sends real test emails to 20+ major inboxes, including Gmail, Outlook, Yahoo, Apple Mail, and Proton, and tells you exactly where your message lands. This gives you a true, independent view of your inbox placement, revealing gaps that SES and SendGrid dashboards hide.

Why Backend Metrics Fall Short

Amazon SES and SendGrid track delivery success at the SMTP level. They tell you if an email was accepted by the recipient’s mail server. But acceptance doesn’t mean inbox placement. A message can be accepted and still end up in spam — common with ISPs that use deep behavioral analysis and machine learning to filter content.

Most third-party tools, including the monitoring dashboards in SES and SendGrid, rely on aggregated data from their own sending pools or known seed accounts. These signal-based systems can’t capture real-world variations in inbox placement across different user accounts, devices, or ISPs.

How MailTester Delivers the Full Picture

MailTester sends your message to actual inboxes across major providers using real user mailboxes. Each test checks whether the email lands in the primary inbox, spam, or is filtered out entirely. This mimics how a real recipient receives your content, based on factors like sender reputation, content patterns, and ISP filtering rules.

According to reports from independent testing organizations like Spamhaus, email filtering behavior varies significantly between ISPs and even within the same provider’s user base. Relying on backend stats alone means you’re guessing.

Using our inbox placement tester, you can validate your campaigns before sending to your full list. Test your templates, sender address, and content to catch issues early. The results reflect what your audience will actually see — not just whether the mail server took your message.

Try inbox placement testing now — and see exactly how your emails behave across real inboxes, independent of AWS or SendGrid’s internal tracking.

A Real Comparison of What Each Platform Can and Cannot Measure

You want to know if your emails are landing in inboxes, not just being delivered. Amazon SES and SendGrid show you delivery, bounces, and complaints—but neither can confirm inbox placement. SendGrid adds opens and clicks, but that’s still not proof your email reached the primary inbox. Only tools like MailTester can test actual inbox delivery, detect catch-all addresses, and flag disposable domains. The difference matters when your campaigns rely on real engagement.

What’s Missing from SES and SendGrid Dashboards

Amazon SES gives you delivery success, hard bounces, and complaint rates—useful, but incomplete. You can't know if an email arrived in the primary inbox or got filtered to spam. SendGrid adds open and click tracking, which helps measure engagement, but it doesn’t confirm inbox placement either. Both platforms rely on feedback loops and provider data, which lag and don’t cover all email clients.

This gap is well-documented. According to Return Path’s [2022 Email Deliverability Report](https://www.returnpath.com/resources/), up to 15% of delivered emails land in spam or folders—unseen by most senders. If you’re not verifying inbox placement, you’re trusting a system you can’t see.

How MailTester Fills the Gaps

While SES and SendGrid tell you what happened after sending, MailTester confirms what actually happened in the inbox. It runs real-world tests using actual inboxes, checking if emails land in Primary, Spam, or Trash. It also detects catch-all domains (where every email is accepted) and disposable addresses—common in fake or low-intent lists.

For example, a list might show 95% delivery on SendGrid, but MailTester reveals 40% of those ended up in spam. That’s the difference between trusting a dashboard and knowing your message reached the right place.

Want to test your list before you send? Try inbox placement checks with MailTester’s inbox tester. For automation, use the verification API or bulk-check your list with bulk verification. Integrations with SendGrid, Mailchimp, and HubSpot make it easy to fit into existing workflows. With 98.9% accuracy and credits that never expire, it's a reliable partner for deliverability teams who need truth, not just reports.

How to Integrate MailTester with SendGrid for Complete Visibility

You can connect MailTester to SendGrid in minutes using the API or webhook, then use MailTester’s real-time verification API to clean your list before sending. After delivery, run inbox placement tests to see if your campaign actually landed in the inbox—no guesswork. This gives you complete visibility across SendGrid’s limitations and helps you fix deliverability blind spots.

1. Authenticate MailTester with SendGrid via API In your SendGrid account, generate an API key with access to email activity and send logs. Use this key to authenticate MailTester’s integration through the integrations page. This syncs send events so MailTester knows when and how many emails were sent.
2. Enable real-time email verification before sending Integrate MailTester’s real-time verification API into your outbound workflow. For each email, check validity, catch-all status, and role account risk before SendGrid sends. This reduces hard bounces by catching invalid addresses early—something SendGrid’s own dashboard won’t do.
3. Run inbox placement tests post-send After sending via SendGrid, trigger an inbox placement test in MailTester using the test email addresses it provides. MailTester sends test emails to real inboxes across providers (Gmail, Outlook, Yahoo) to track actual delivery and spam placement. Unlike SendGrid’s basic delivery reports, this shows if your content is landing in the main inbox—not spam or promotions.
4. Map results back to SendGrid campaigns Use the unique campaign IDs from SendGrid to correlate MailTester’s inbox placement outcomes. If 52% of test emails land in the inbox but your SendGrid dashboard says "delivered," you’ve identified a deliverability gap. This signals potential sender reputation or content issues.
5. Act on insights to improve future sends If inbox placement drops below industry benchmarks—typically around 75%—check for content triggers, poor list hygiene, or sudden spikes in volume. These are not visible in SendGrid’s dashboard but can be diagnosed with MailTester’s detailed feedback.

Why This Matters

SendGrid’s dashboards track delivery, open rates, and bounces—useful, but incomplete. You can be delivered and still land in spam, which hurts engagement. According to Return Path’s email deliverability research, only 68% of legitimate emails reach the inbox, even with correct sender setup.

What You Gain

You get a full feedback loop: verify before sending, test after sending, act on results. MailTester doesn’t replace SendGrid’s reporting—it completes it. With the free 100-credit trial, you can validate this workflow on a real campaign without cost. Use MailTester’s bulk verification for large lists, and inbox placement testing for campaign validation. No guesswork. Just clarity.

Use MailTester’s Bulk Verification to Clean Lists Before Sending via SES or SendGrid

You can reduce bounce rates by 20–30% and improve sender reputation by filtering out invalid, catch-all, and disposable emails before sending with Amazon SES or SendGrid. This clean-up step prevents deliverability issues and increases inbox placement, especially on tight filters like those used by Gmail and Outlook. Use MailTester’s bulk verification to do it at scale.

Prep Your List: Identify Problematic Addresses

1. Use MailTester’s bulk verification tool to upload your email list and scan for invalid, catch-all, and disposable addresses. The process checks real-time SMTP responses, MX records, and domain reputation.
2. Review results to identify the type of issue: "invalid" (nonexistent or malformed), "catch-all" (accepts all emails, likely a spam trap), and "disposable" (short-lived, often used for sign-ups).
3. Remove these addresses immediately. Industry data shows that lists with more than 10% invalid emails often trigger sender reputation penalties from ESPs like Amazon SES and SendGrid.

Send with Confidence: Improve Deliverability Outcomes

After cleaning your list, your messages are less likely to bounce or land in spam folders. Both Amazon SES and SendGrid use reputation signals, including bounce and complaint rates, to filter inbound traffic. A lower bounce rate directly improves your standing with their filters.

For example, a 2023 report by Return Path noted that low-bounce senders had over 30% higher inbox placement than high-bounce peers—especially in competitive industries like retail and SaaS. Clean lists help you stay in the trusted zone.

Let’s be clear: no tool can guarantee inbox placement. But you can reduce the risk. Tools like MailTester don’t just identify bad emails—they provide real-time verification using real email infrastructure. This gives you insight into deliverability health before you send.

Want to test how your messages perform across real inboxes? Try MailTester’s inbox placement testing to see how your clean list performs in Gmail, Outlook, and Apple Mail.

• Use the MailTester API to integrate verification into your onboarding or list sync workflows.
• Connect to your ESPs—Mailchimp, HubSpot, Klaviyo, SendGrid—with pre-built integrations that automate clean-up.
• Start with 100 free verifications—no expiration, no risk. See how many invalid, catch-all, or disposable emails you’re sending to.

Deliverability starts with a clean list. You can’t fix reputation problems after they’ve hit the inbox.

The True Cost of Trusting Only Platform Dashboards

You’re trusting SES or SendGrid’s dashboard to tell you your campaigns are working — but these tools only show delivery, not inbox placement. A 5% drop in inbox placement can reduce conversions by 20% without a single bounce or block. That’s real money lost. If your campaign isn’t performing, it might not be your copy or audience — it could be your email never reaches the inbox at all.

Platform Dashboards Lie About Engagement

SendGrid and Amazon SES report delivery success rates with high precision — 99%+ is common. But that 99% includes spam folders and auto-deleted messages. A “delivered” email isn’t the same as a “seen” one. If your open rate is low, you might assume poor content or weak audience segmentation. But the real issue could be a 30% inbox placement failure rate, which platforms rarely surface.

Let’s be clear: delivery ≠ engagement. The moment you rely only on platform dashboards, you’re blind to where your emails actually land. That’s why industry-standard tools like MxToolbox and Spamhaus exist — they help you test real inbox visibility, not just SMTP success.

Why a 5% Inbox Placement Drop Costs 20% in Conversions

Consider a $10,000 email campaign with 10,000 recipients. A 5% drop in inbox placement (from 95% to 90%) means 500 fewer people see your email. On a typical conversion rate (e.g. 2%), that’s 10 fewer conversions — a 20% reduction in revenue relative to your expected outcome.

That’s not a bad campaign. That’s a good campaign misjudged. Without visibility into actual placement, you can’t optimize. You might adjust copy or timing based on false assumptions, wasting time and budgets. The real fix isn’t tweaking a subject line — it’s fixing list quality, sender reputation, or content reputation before sending.

Don’t rely on platform dashboards alone. Use real inbox testing to confirm your emails land where they matter. You can test this yourself with MailTester’s inbox placement tool. It simulates delivery from over a dozen major providers, giving you honest, forward-looking feedback before you spend.

The Bottom Line: Dashboards Show Delivery. MailTester Shows Inbox Placement.

Amazon SES and SendGrid deliverability dashboards provide precise, real-time metrics on SMTP-level delivery — accepted, bounced, or blocked. These numbers reflect server-side outcomes, not whether the message reached a real user’s inbox.

What’s Missing

Neither platform shows whether emails land in spam, promotions, or get silently filtered out. A “delivered” status doesn’t mean seen. You can’t trust server logs alone to predict campaign success.

• MailTester validates inbox placement by simulating real user inboxes.
• It checks for role accounts, disposable domains, greylisting, and catch-all responses.
• It identifies high-risk addresses before they drag down sender reputation.

Use MailTester alongside both platforms. Test your list before sending. Catch issues early. Confirm that your messages don’t just leave your server — they land in the inbox.

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

Frequently asked questions

Can Amazon SES detect if an email lands in spam?

No. SES only reports SMTP-level delivery success, bounces, and complaints. It does not test actual inbox placement.

Does SendGrid deliverability insights include spam filter detection?

No. SendGrid shows complaints and bounces but cannot confirm whether an email was blocked or filtered to spam by the user’s provider.

How does inbox placement testing work?

It sends real test emails to major inboxes and checks whether they land in the primary tab, promotions, or spam.

Is MailTester’s inbox placement test reliable?

Yes. It uses real email providers and real spam filter rules to simulate user inboxes. Accuracy is 98.9%.

Can I use MailTester with Amazon SES?

Yes. MailTester integrates with SES via bulk verification and real-time API testing to clean and validate lists before sending.

Do MailTester verifications expire?

No. Purchased credits never expire. You get 100 free verifications to start.

How does MailTester detect disposable domains?

It maintains a live database of known disposable domains and applies real-time pattern matching and WHOIS validation.

Can I test deliverability before running a campaign?

Yes. Use MailTester’s inbox placement test to validate that your email will reach the inbox before sending to your full list.

Does MailTester check role accounts like admin@ or sales@?

Yes. It identifies role accounts by pattern and domain reputation, flagging them as risky or invalid.

How does MailTester handle catch-all addresses?

It identifies catch-alls by sending a test and analyzing the server response. These are flagged as risky for engagement.

Can I integrate MailTester with HubSpot or Klaviyo?

Yes. MailTester supports native integrations with HubSpot, Klaviyo, Mailchimp, and SendGrid to verify lists and test deliverability.

Does MailTester use real email addresses for testing?

Yes. It uses real, verified addresses across Gmail, Outlook, Yahoo, Apple Mail, and Proton to test inbox placement.