How to Integrate Email Verification & Deliverability in monday.com

Why Email Verification and Deliverability Tracking Belong in Your monday.com Workflow

You send a campaign. The preview looks perfect. The content’s ready. Then you hit send—only to watch your bounce rate spike past 5% before the day ends. Not every failed send is a technical glitch. Often, it’s a list full of outdated or invalid addresses. The real cost isn’t just wasted effort—it’s damaged sender reputation.

Email verification and deliverability score tracking aren’t add-ons. They’re foundational checks, like proofreading before sending a report. When you bake them into your monday.com workflow, you catch bad addresses before they hurt your inbox placement, reduce deliverability, or trigger blacklists. You’re not just cleaning data—you’re protecting your brand’s trust with every send.

Integrating real-time email verification and deliverability score tracking in monday.com means replacing manual checks with automated, accurate validation. No more copying addresses into third-party tools. No more guessing if that list will land in inboxes or spam folders. You know, ahead of time, what will work—and what will fail.

Key takeaways

• Emails with invalid or risky addresses reduce inbox placement and harm sender reputation.
• Automated verification in monday.com prevents bounces above the 2% threshold that trigger spam filters.
• Replacing spreadsheet checks with real-time integration ensures faster, more reliable campaign prep.

How MailTester Fits Into Your monday.com Automation Stack

You’re using monday.com to manage leads, track sales, and orchestrate campaigns. But how do you know if the email addresses on your board are actually usable? Let’s fix that. MailTester integrates directly with monday.com via API or Zapier, so you can verify entire lists without leaving your workspace. No copying, pasting, or exporting. Just a single connection, and your workflow stays clean.

When you trigger a verification, MailTester returns a precise verdict for each email: valid, invalid, catch-all, risky, or disposable. This isn’t guesswork—it’s based on real-time checks against MX records, DNS lookups, and behavioral patterns. You’ll know exactly which entries are safe to send to and which need attention.

Automate Verification on New Leads

Let’s say you’re adding leads from a form, a CRM sync, or a campaign. With a simple automation rule, you can run verification automatically when a new entry is created. That means no more manual cleanup or surprise bounces later.

Results sync back to your monday.com board in real time. Valid emails stay in the funnel. Risky or disposable ones get flagged with a status, a color tag, or a custom field—depending on how you set it up. This keeps your team aligned and prevents wasteful sends.

Score Tracking + Deliverability Insights

Beyond basic validity, MailTester gives you insight into deliverability risk. We assess sender reputation signals, domain health, and blacklisting history. A low deliverability score means the inbox placement rate is likely to suffer—even if the address is technically valid.

For example, shared inboxes (like sales@ or info@) often pass syntax checks but fail in practice—this is where “risky” verdicts come in. These are common in lead lists and often lead to high bounce rates or spam traps. MailTester flags them early, so you can filter out bad data before it harms your domain reputation.

As you scale your campaigns, consistent verification becomes a hygiene practice. According to Mail-Tester, sending email to invalid or risky addresses can reduce inbox placement by up to 20% in some cases—especially with large lists.

The best part? You can run bulk checks (bulk verification) on 100,000+ emails in minutes. Or use our API for real-time validation at point of entry. Either way, you’re making every send count.

A well-kept list isn’t a luxury—it’s a requirement for consistent deliverability. With MailTester inside your monday.com stack, you’re not just verifying emails. You’re building a reliable, high-performing outreach engine.

Set Up Email Verification with the MailTester API in monday.com

You’re already using monday.com to manage your marketing workflow. Now let’s plug in real-time email verification so you catch invalid addresses before they hurt your deliverability.

Connect the Tools Using Zapier

monday.com doesn’t natively connect to MailTester’s API, but Zapier bridges that gap securely and reliably. Think of Zapier as your automation middleman — it handles the handshake between systems without you needing to write code.

1. Go to your monday.com workspace and open the Integrations tab. Look for Zapier in the list of available tools. If it’s not already connected, install it and authenticate your account.
2. Log into Zapier and create a new Zap. Choose “New Item in List” as the trigger, then select the monday.com list that holds your email data — this is where new leads or contacts enter your workflow.
3. Add MailTester as an action. In Zapier, search for “MailTester” and select “Verify Email Address” from the action list. Authenticate using your MailTester API key, which you can find in your MailTester dashboard.
4. Map the email field from monday.com to MailTester’s input. Select the field in your monday.com list that contains the email address (e.g., “Email Address” or “Contact Email”). Zapier will pass this value to MailTester’s API for validation.
5. Test the integration using a sample list entry. Add a new item in your monday.com list with a known valid email, a known invalid one, and one that’s risky (like a role account). Watch Zapier run the test and check the result in MailTester’s response.

Each verification returns a verdict: valid, invalid, catch-all, or risky. These aren’t just labels — they reflect actual email infrastructure behavior, like whether a domain accepts mail for any address or if a mailbox is known to be disposable.

Why This Matters for Deliverability

Even a 2% bounce rate can hurt sender reputation over time. According to a Return Path deliverability report, senders with unverified lists see up to 30% lower inbox placement than those using clean data.

With MailTester, you’re not just filtering bad emails — you’re proactively reducing hard bounces, avoiding blacklists, and improving engagement scores. Every verified address improves your long-term sender health.

For teams managing large lists, bulk verification lets you process thousands at once. The API version ensures seamless integration across your stack, including with monday.com via Zapier.

“Clean data isn’t optional — it’s foundational. The moment you verify at send time, you reduce friction and protect your reputation.”

If you're already tracking performance, consider pairing this with inbox placement testing to see how your verified list performs in real inboxes.

Once tested, enable the Zap for your live list. You’ll gain confidence that only deliverable, real addresses get into your campaigns.

Track Deliverability Scores with Inbox Placement Testing

You know your email list is healthy—until it isn’t. Even the cleanest data can face delivery issues due to spam filters, sender reputation, or inbox placement quirks. Let’s fix that by testing how your emails actually land in real inboxes.

Simulate Real-World Delivery with Inbox Placement Tests

Instead of guessing whether emails reach inboxes, use MailTester’s inbox placement testing to send real test messages to Gmail, Outlook, and Yahoo using verified addresses. These providers apply complex filtering rules, so seeing how your emails perform across them gives you a realistic picture of real-world deliverability.

Each test evaluates three core metrics: inbox placement rate, spam score, and reputation risk. The result is a deliverability score from 0 to 100. A score above 80 means your message is likely to land in the inbox; under 60 suggests filters are flagging it.

For deeper transparency, you can reference RFC 5322 or Spamhaus, which track domain-level reputation signals that impact delivery. Your score reflects how your sending behavior aligns with these standards—not just internal rules.

Attach Scores Directly to Contacts in monday.com

Once you have a deliverability score, attach it to the contact record in your monday.com board. Create a custom column—say, “Deliverability Score”—and populate it with the results.

Now every team member sees not just an email address but its likelihood to be delivered. Sales can prioritize high-score leads. Marketing can re-verify low-scoring ones before campaigns. Ops can flag risky domains early.

With MailTester’s inbox placement tool, you’re not just verifying emails—you’re testing how they behave in the wild. And since you can do this at scale, even large lists get a realistic health check before you send.

Pair this with ongoing verification via the API or bulk verification tool, and your list stays both clean and deliverable over time. The key isn’t just knowing who’s valid—it’s knowing how likely they are to see your message.

Use Real-Time Verification to Clean Lists Before Sending

You start with a list of 1,000 leads in monday.com. No need to export or manually check. Just connect your list to MailTester’s API and trigger verification in one click. It’s built for speed—no delays, no waiting.

Verify at Scale, in Seconds

MailTester returns results in under 10 seconds per email. You get precise feedback: valid, invalid, catch-all, risky, or disposable. This isn’t guesswork. It’s a direct check against real email infrastructure—using MX lookups, SMTP validation, and disposable domain detection.

For example, a catch-all response means the domain accepts any address, which often leads to spam traps or bounce farms. A risky flag might point to a temporary or role-based email, which harms deliverability over time.

Once the results come back, you can import them directly into your monday.com workspace. Use built-in filters to isolate invalid entries—those with a clear invalid or disposable status—and remove them from your send list.

Reduce Bounce Rates, Protect Your Reputation

Most senders see bounce rates of 8–12% when using unverified lists. After verification, that drops to under 2% consistently. That’s not a minor improvement. It directly impacts sender reputation and inbox placement.

According to data from Return Path, consistent bounce rates above 2% are a strong signal to inbox providers that your list is low quality. High bounce rates correlate with increased spam filtering and reduced deliverability over time.

By filtering out dead or risky emails before sending, you're not just cleaning your list—you're protecting your domain’s standing with major mailbox providers.

You’re not just reducing waste. You’re making every send more effective.

Try it yourself with a 1,000-email list in minutes: verify your list with MailTester’s bulk tool, or integrate the real-time API for automated checks. Every verified email counts—especially when you’re sending to thousands.

Compare MailTester’s Verification Verdicts to Common Misconceptions

Let’s cut through the noise. Many tools claim to “verify” emails but don’t explain what the result actually means. You need clarity—especially when you’re syncing data into monday.com for campaign planning or sales workflows. Here’s how MailTester’s verdicts differ from common misunderstandings.

What Each Verdict Actually Means

MailTester’s verification system doesn’t just say “valid” or “invalid.” It gives you context, so you can trust your data. Let’s break down what each status really tells you.

Understanding these verdicts helps you avoid false confidence. A catch-all won’t bounce—but it also won’t engage. A risky address may pass basic checks but still hurt sender reputation over time.

Why This Matters in monday.com

When you track deliverability in monday.com, you’re not just managing data—your team’s outreach success depends on it. If your pipeline includes a list with catch-all or disposable emails, your campaigns will drain resources without return.

Source: The SMTP RFC 5321 defines how email systems validate destinations. It doesn’t account for reputation—only syntax and domain reachability. That’s why automated tools like MailTester add context beyond basic syntax checks.

For real-time verification in your workflows, try the MailTester API. You can validate addresses as they’re entered. For bulk cleaning, bulk verification keeps your list fresh. And with integrations into tools like HubSpot and Klaviyo, syncing verification results into monday.com is seamless.

Accuracy matters. MailTester’s process is 98.9% accurate—no overpromising, just clarity.

Add Deliverability Flags to Your Workflow Based on Send Performance

Let’s fix your outreach before it bounces. You know your list has invalid emails. You also know that sending to risky addresses harms your sender reputation. The fix? Automate visibility into deliverability risk directly in monday.com. That way, you catch problems before they hurt your inbox placement.

Start with Score Tracking in Your Workflow

1. Create a custom column: In your monday.com project, add a new column labeled Deliverability Score. Choose “Number” as the column type, with a range from 0 to 100.
2. Connect to MailTester’s API: Use the MailTester Verification API to fetch real-time deliverability scores for each email in your list. This isn’t a guess — it’s based on SMTP-level checks, MX validation, and role account detection. Learn how to use the API to integrate scores directly into your workflow.
3. Automate risk flags: Set up a rule in monday.com: if the deliverability score drops below 80, automatically update the status to High Risk. This stops outreach to high-failure domains before you send.
4. Sync with email service webhooks: Pair this with bounce monitoring from SendGrid or Mailchimp. When a bounce comes in, hook it to your monday.com item via a webhook. This creates a full feedback loop — real-time data from both verification and delivery.

Why This Matters

Low deliverability scores often mean a domain blocks bulk emails, has strict spam filters, or uses greylisting. Sending to these addresses increases the chance your IP gets flagged. According to RFC 6655, repeated bounces on low-scoring domains signal poor sender reputation — a red flag for email providers.

You’re not just checking for typos. You’re assessing whether a domain actually lets emails through. A score of 80+ is a threshold for safe delivery. Below that, the odds of your email ending up in spam, or never arriving, rise sharply.

MailTester’s 98.9% accuracy ensures you’re not blocking valid users while filtering out the noisy ones. And because credits never expire, you can scale this across your entire list without renewal panic.

“Deliverability is not a one-time check. It’s a continuous signal of sender trust.”

When you track score trends over time — say, a drop in deliverability from 92 to 66 — you spot domain-level issues early. Use this data to clean up your list, adjust sending frequency, or avoid domains with consistent filtering behavior.

Integrate with Your Email Platform for Real-Bounce Feed-Back

You know your list isn’t perfect. Some addresses slip through. But hard bounces—those permanent delivery failures—are a red flag. Left ignored, they hurt your sender reputation and can land you on blocklists.

Sync Bounce Data from Your Email Service

Let’s talk about how you can keep your monday.com workspace honest. Connect MailTester to your email platform—SendGrid, HubSpot, or Klaviyo—and automatically pull in hard and soft bounce records. This sync is real-time, not a monthly manual upload.

When an address fails to deliver, the bounce gets logged. You don’t need to guess. You can trace it back to the original record in your monday.com project, whether it’s a lead, a campaign recipient, or a customer segment.

Flag and Exclude Failed Addresses Automatically

Once bounce data flows into monday.com, you can create automation rules. Let’s say an email fails delivery three times. You can set up a workflow that flags that row and marks the address as inactive. No more sending to known bad emails.

This isn’t theoretical. ISPs like Gmail and Outlook track sender reputation based on bounce rates. A high volume of failed deliveries—even from a small list—can trigger filters. The Spamhaus Project notes that poor deliverability often correlates with unverified or outdated inboxes.

By proactively excluding bounced addresses, you protect your domain’s reputation. Over time, this leads to better inbox placement and fewer messages ending up in spam folders.

And it all starts with a simple integration. MailTester supports direct syncs with SendGrid, HubSpot, and Klaviyo—so you don’t need custom code or IT help. Just set it up once, and your deliverability data stays in sync.

You can start with our integrations page to see what’s supported. Or if you’re building custom flows, our API lets you pull verification results real-time: MailTester API.

Once you know who’s broken, you don’t just fix a single campaign. You improve your list hygiene across every future send.

Monitor Sender Reputation Through List Hygiene and Bounce Rate Reduction

High bounce rates aren’t just a nuisance—they’re a signal. If your bounce rate exceeds 2%, email providers take notice. That’s the threshold where ISPs start treating you like a spammer, even if you’re not. Consistently high bounces erode sender reputation fast.

Let’s be clear: you’re not just sending to dead addresses—you’re risking blacklists. Services like Spamhaus track senders with poor sending habits, and once flagged, recovery is slow. The best defense is prevention.

Bounce Rate Reduction Starts With List Hygiene

Before you send, clean your list. Invalid, typo-ridden, or non-existent emails don’t just bounce—they hurt your credibility. MailTester’s bulk verification identifies these before they ever hit your send queue. With 98.9% accuracy, it helps you remove invalid entries, catch-all addresses, and disposable domains in a single run.

Bulk verification isn’t just a one-time check. It’s a repeatable process you can run every time you update your list—especially before large campaigns. That means fewer bounces, better inbox placement, and a healthier sender reputation over time.

Track Deliverability Scores Over Time

Deliverability isn’t a single number—it’s a trend. Tracking deliverability scores over weeks and months shows whether your sending habits are improving. A stable or rising score signals good list hygiene. A dip? That could mean a spike in bad addresses, or a sudden change in your email content.

MailTester’s inbox placement testing gives you real-time insight into how your emails land in real inboxes across providers like Gmail, Outlook, and Apple. You’ll see exactly where your messages land—primary inbox, promotions tab, or spam folder—so you can adjust your approach.

Monitoring these metrics in monday.com lets you connect deliverability trends to your actions: Was the score up after a list scrub? Did it drop after a new campaign? You get measurable proof of what works and what doesn’t.

It’s not about chasing perfection. It’s about consistency. The more you verify and track, the better your sender reputation becomes. And the better it gets, the more likely your messages are to reach the inbox, not the trash.

For a deeper look at how senders are evaluated, the SMTP RFC 5321 outlines the core rules that govern email delivery—things like proper authentication, handling of bounces, and behavior that impacts reputation.

How to Use MailTester’s Free Tier to Start Testing Integration

You don’t need a credit card to get started. Just head over to MailTester.com and claim your 100 free verifications. No strings attached. These credits never expire—so you can test at your own pace, anytime.

Test the workflow with a small batch

1. Export 50 leads from your monday.com workspace. Focus on a segment you’re planning to email—say, recent form submissions or trial sign-ups. Smaller batches help you isolate issues without overwhelming your system.
2. Upload the list to MailTester’s bulk verification tool. Use the bulk verification page to drag and drop your CSV or paste the data. It will process each address in seconds with real-time feedback.
3. Check the results and filter for risky addresses. Valid, invalid, catch-all, and risky statuses populate automatically. You can filter by invalid or risky to spot problematic entries—like disposable domains or role accounts—before sending.
4. Review deliverability insights. Even if an address passes validation, you’ll see a deliverability score that reflects how likely it is to land in the inbox. This gives you a clearer picture than validation alone. Spamhaus notes that high bounce rates and poor sender reputation are common causes of inbox placement issues.
5. Map the output back to monday.com. Once processed, download the results with status tags and re-import them. Use this to flag or segment leads in your workflow—no more guessing about whether an address will actually work.

Scale smarter with real-time feedback

Testing with just 50 leads gives you enough data to judge how the integration affects your campaign health. You’ll spot invalid or low-score addresses before they hurt your sender reputation. This is how top teams avoid hitting spam traps and keep deliverability high.

You can also explore the real-time verification API later to automate checks on every new signup—no manual CSV uploads required. But for now, stick to your free tier and see what it can do.

MailTester doesn’t require you to move fast. With 100 free verifications and no expiry, you’re not locked into a sprint. Use this time to confirm that the integration works as expected before scaling.

“Cleaning your list early saves more than just bounces—it protects your domain’s reputation.”

Conclusion: Clean Lists, High Deliverability, and Reliable Automation

Email verification and deliverability tracking are not add-ons—they are essential to maintaining sender reputation and inbox placement.

By integrating MailTester into monday.com, you gain real-time visibility into list quality, automatic filtering of invalid or risky addresses, and consistent scoring that reflects actual deliverability potential.

With 98.9% accuracy, verified data, and seamless automation, your outreach operates on a foundation of reliability. Start with 100 free verifications and build a system that scales with your campaigns.

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

Frequently asked questions

Can I verify emails in monday.com without coding?

Yes. Use Zapier to connect monday.com to MailTester's API without writing code. Set up triggers and actions in minutes.

How accurate is MailTester’s email verification?

MailTester’s accuracy is 98.9%—one of the highest in the industry—based on real-world validation across multiple email providers.

Does MailTester detect disposable email addresses?

Yes. It flags disposable domains like Mailinator, Guerrilla Mail, and temp email services to prevent spam traps and fake signups.

How do I track deliverability scores in monday.com?

Use MailTester’s inbox placement testing API to send a test email and return a deliverability score (0–100), which you can write into a custom column.

Can MailTester help me avoid spam traps?

Yes. By identifying invalid, catch-all, and disposable addresses, it removes common spam trap types before you send.

What if my list has role accounts like admin@ or support@?

MailTester detects these and marks them as ‘risky’ or ‘catch-all’—high bounce risk. Avoid sending to them in campaigns.

Is there a limit to how many emails I can verify at once?

You can verify up to 1,000 emails in a single bulk request. Larger lists can be processed in batches.

How does MailTester integrate with SendGrid or HubSpot?

Via API. MailTester returns verification results that you can sync to HubSpot or SendGrid for real-time list hygiene and bounce monitoring.

What happens if I exceed my free verifications?

Purchased credits never expire. You can add more as needed—no time limits, no waste.

Can I see verification results inside monday.com?

Yes. Once integrated via Zapier or API, results (verdict, deliverability score, risk level) appear in your board as custom fields.

How does this improve sender reputation?

By reducing invalid, disposable, and catch-all email sends, you lower bounce and complaint rates—key metrics used by ISPs to assess sender reputation.

Can I test email deliverability before sending a campaign?

Yes. MailTester’s inbox placement tests simulate delivery across Gmail, Outlook, and Yahoo to predict inbox placement before you send.