How I Would Fix emails landing in spam in a Make.com and Airtable marketplace MVP Using Launch Ready.

How I Would Fix emails landing in spam in a Make.com and Airtable marketplace MVP Using Launch Ready

If your marketplace MVP is sending emails through Make.com and those messages are landing in spam, the symptom is usually simple: users are not seeing verification, booking, or transaction emails fast enough to trust the product. In business terms, that means broken onboarding, lower activation, more support tickets, and lost revenue from people who never finish signup.

The most likely root cause is not "email content" alone. I would first inspect domain authentication and sending reputation: SPF, DKIM, DMARC, From alignment, and whether Make.com is sending from a shared or poorly configured sender identity.

My first move would be to check the exact sending domain, the SMTP or email provider behind Make.com, and whether Airtable-triggered automations are using a consistent From address. If those basics are wrong, every other fix is noise.

Triage in the First Hour

1. Check one recent spammed email end to end.

• Open the Make.com scenario run history.
• Confirm the trigger fired from Airtable as expected.
• Capture the exact recipient address, subject line, From name, From email, and message body.

2. Inspect the sending path.

• Identify whether Make.com is sending via Gmail, Outlook, SendGrid, Mailgun, Postmark, Amazon SES, or a built-in connector.
• Confirm if there is one sender domain or multiple inconsistent sender identities.

3. Review DNS for the sending domain.

• Check SPF record presence and syntax.
• Check DKIM signing status.
• Check DMARC policy and alignment.
• Verify there are no duplicate SPF records.

4. Check mailbox placement signals.

• Look at spam folder placement across at least 3 test inboxes: Gmail, Outlook, and one business mailbox.
• Compare open rates before and after any recent change.

5. Review recent changes in Airtable and Make.com.

• New automation?
• New template?
• New link tracking?
• New custom domain?
• New subdomain?

6. Confirm compliance basics.

• Is there a valid reply-to?
• Is there an unsubscribe link for marketing mail?
• Are you mixing transactional and promotional emails?

7. Check reputation tools.

• Use Google Postmaster Tools if available.
• Check Microsoft SNDS if relevant.
• Review bounce rate and complaint rate from the provider dashboard.

8. Audit secrets and access quickly.

• Confirm API keys are stored in environment variables or secure vaults.
• Remove any hardcoded credentials in Make.com notes or Airtable fields.

dig TXT example.com
dig TXT _dmarc.example.com

Root Causes

| Likely cause | What it looks like | How to confirm | |---|---|---| | SPF missing or broken | Mail arrives but fails authentication | Inspect DNS TXT records and message headers for SPF fail | | DKIM not enabled | Messages look legitimate but fail trust checks | Check headers for `dkim=fail` or no DKIM signature | | DMARC misaligned | SPF/DKIM pass on another domain but not your visible From domain | Compare envelope sender vs visible From domain | | Shared or low-reputation sender | Good content still lands in spam | Test across inbox providers; review provider reputation metrics | | Spammy content or formatting | Too many links, images, sales language, or broken HTML | Run content through a plain-text test and inbox previews | | Poor automation hygiene | Duplicate sends, retries, loops, or stale Airtable triggers | Review Make.com execution logs for repeated runs |

1. SPF missing or broken

This is common when founders add a new email tool but never update DNS properly. If SPF does not include the actual sender service, receiving mail servers cannot verify that Make.com is allowed to send on your behalf.

I confirm this by checking DNS TXT records and by reading raw message headers for SPF results. If I see multiple SPF records or syntax errors, I fix that first because it is a direct trust failure.

2. DKIM not enabled

DKIM signs each email so recipients can verify it was not altered in transit. Without DKIM, even decent content can be treated as suspicious because it lacks cryptographic proof of authenticity.

I confirm this by looking at header results such as `dkim=pass` or `dkim=fail`. If DKIM is absent or failing after a domain change, I treat that as a production issue.

3. DMARC misalignment

DMARC ties together SPF and DKIM with the visible From domain users see in their inbox. This matters because an email can technically pass SPF on one domain while still looking mismatched to Gmail or Outlook.

I confirm this by comparing the header domains with the visible From address. If they do not align cleanly, inbox providers may downgrade trust even when delivery technically succeeds.

4. Shared or low-reputation sender

If you are using a generic shared sender through a platform connector without proper branding setup, your messages may inherit poor reputation from other senders. That means your app pays for someone else's bad behavior.

I confirm this by testing with multiple inbox providers and checking whether all messages from that sender show weak placement regardless of content quality. If yes, I move you to a dedicated transactional provider with proper domain setup.

5. Spammy content or formatting

Marketplace MVPs often send templates that look like marketing blasts: too many links, too much styling, vague subject lines, image-heavy bodies, or misleading wording like "urgent" when nothing urgent exists. That gets filtered fast.

I confirm this by comparing plain-text versions against HTML versions and reviewing subject lines for clickbait patterns. If the content reads like acquisition copy instead of product utility mail, I rewrite it.

6. Automation loops or duplicates

Make.com scenarios can accidentally resend emails when Airtable records update multiple times or when retries are not idempotent. Duplicate sends increase complaint rates and damage trust with inbox providers very quickly.

I confirm this by reviewing execution history for repeated sends to the same recipient within minutes or hours. If duplicates exist, I add deduplication logic before touching deliverability settings again.

The Fix Plan

My fix plan is always defensive: authenticate first, simplify second, then retest before scaling volume back up.

1. Lock down one sending identity.

• Use one verified From domain only.
• Avoid switching between personal Gmail addresses and branded addresses.
• Keep transactional mail separate from marketing mail.

2. Move to proper transactional infrastructure if needed.

• For a marketplace MVP, I usually prefer Postmark, Mailgun, SendGrid dedicated setup depending on volume and simplicity needs.
• If you are already using something else inside Make.com but cannot prove authentication health quickly enough, I would switch rather than patch around uncertainty.

3. Configure DNS correctly.

• Add exactly one SPF record per domain.
• Enable DKIM signing with the provider's recommended selector.
• Publish DMARC with monitoring first before enforcing hard rejection.

4. Align visible sender details with authenticated domains.

• The From address should match the authenticated brand domain.
• Reply-To should route to a monitored inbox if support needs visibility.

5. Clean up templates.

• Use plain language subjects like "Your marketplace verification code" instead of hype-driven copy.
• Reduce links to only what is necessary.
• Add text-only fallback versions where possible.

6. Harden Make.com scenarios.

• Add filters so only valid Airtable records trigger sends.
• Add dedupe checks using record IDs or message IDs.
• Prevent retry loops from re-sending identical emails.

7. Add monitoring before increasing traffic again.

• Track delivery rate, bounce rate p95 complaint rate if available from your provider dashboard

.

• Watch inbox placement across Gmail and Outlook after every change.

8. Keep secrets out of Airtable fields and scenario notes.

• Store API keys in secure environment variables where possible.
• Rotate any exposed key immediately if you find one in plain text.

9. Roll out gradually.

• Test with 10 internal seed addresses first.
• Then 25 real external addresses across different providers.

. . This is where most founders make things worse: they change DNS and template logic at the same time without knowing which fix helped. I would change one layer at a time so we can prove what actually moved deliverability.

Regression Tests Before Redeploy

Before shipping anything back into production traffic,

I would run these tests:

1. Authentication checks

• SPF passes
• DKIM passes
• DMARC aligns
• Visible From matches authenticated domain

Acceptance criteria:

• At least 95 percent of test messages show passing authentication headers across Gmail and Outlook samples

2. Inbox placement checks

• Send to 10 seed accounts:

5 Gmail 3 Outlook/Microsoft 2 business domains

Acceptance criteria:

• At least 8 of 10 land in primary inbox or promotions as expected for their category
• Zero land in spam during initial retest unless there is an obvious recipient-side rule

3/ Content sanity checks

• Subject line under control
• No broken HTML
• No suspicious attachment behavior
• No excessive links

Acceptance criteria:

• Email renders correctly on mobile at 375px width
• Plain-text version exists
• CTA works on desktop and mobile

4/ Scenario safety checks

• One Airtable record equals one email send
• Retries do not create duplicates
• Failed runs log clearly

Acceptance criteria:

• Duplicate sends = 0 during test batch of 20 events

5/ Security checks

• No secrets exposed in Airtable fields
• No hardcoded API keys in scenario steps
• CORS irrelevant here unless there is a web form feeding Airtable directly; if so validate it too

Acceptance criteria:

• No credential values visible to non-admin collaborators
• Only least privilege access granted to automation accounts

Prevention

If I were hardening this long term as part of roadmap.sh style cyber security work,

I would put these guardrails in place:

• Monitor deliverability weekly.

Track bounce rate over 5 percent as an alarm threshold if volume grows unexpectedly; anything above that needs review immediately.

• Separate mail types early.

Transactional mail should never share reputation with newsletters or cold outreach.

• Add code review discipline to automations.

Every new Make.com scenario should be reviewed for duplicate triggers, unsafe retries, secret exposure, and bad fallback behavior before launch.

• Keep DMARC on monitoring mode first,

then move toward quarantine once authentication has been stable for at least 14 days with no major complaints.

• Maintain an allowlist of seed test accounts across Gmail,

Outlook, Yahoo, Apple, and one business mailbox so every deploy gets real-world coverage.

• Improve UX around email dependency points.

Tell users when an email has been sent, offer resend controls, and show clear fallback states if delivery takes longer than expected.

• Watch performance indirectly too:

slow forms, broken redirects, or flaky webhook timing can trigger duplicate submissions that become duplicate emails later.

When to Use Launch Ready

Use Launch Ready when you need this fixed fast without turning your MVP into a science project.

I would handle the full launch-safe layer: domain setup, email authentication, Cloudflare, SSL, deployment hygiene, secrets handling, monitoring, redirects, subdomains, and handover notes so your team knows what changed.

This sprint fits best if:

• Your marketplace already works but email trust is hurting activation
• You have no time to debug DNS plus automations plus deployment risk yourself
• You want one senior engineer to clean up production risk before paid traffic goes live

What you should prepare before kickoff:

1. Access to DNS registrar and Cloudflare account 2. Access to Make.com scenario editor 3. Access to Airtable base schema 4. Email provider account details 5/Open questions about which emails are transactional vs promotional 6/ Any recent screenshots of spammed messages 7/ A list of target inboxes for testing

If you bring those items ready on day one,

I can usually cut through guesswork quickly and avoid expensive trial-and-error that burns another week of founder time.

References

1. Roadmap.sh API Security Best Practices: https://roadmap.sh/api-security-best-practices 2/ Roadmap.sh Cyber Security: https://roadmap.sh/cyber-security 3/ Google Workspace Admin Help on Email Authentication: https://support.google.com/a/topic/2752442 4/ Microsoft Learn on Sender Requirements: https://learn.microsoft.com/en-us/microsoft-cloud/dev/dev-proxy/concepts/email-authentication 5/ RFC 7489 DMARC Specification: https://www.rfc-editor.org/rfc/rfc7489

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Take the next step

If this is a problem in your product right now, here is what to do next:

• [Use the free Cyprian tools](/tools) - estimate cost, score app risk, check launch readiness, or pick the right service sprint.

• [Book a discovery call](/contact) - I will tell you honestly whether you need a sprint or if you can DIY the next step.

*Written by Cyprian Tinashe Aarons - senior full-stack and AI engineer helping founders rescue, launch, automate, and scale AI-built products.*