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 from Make.com and they are landing in spam, the symptom is usually simple: users do not see onboarding, booking, or transaction emails when they expect them. In business terms, that means lower activation, missed replies, more support tickets, and lost conversions.

The most likely root cause is not "email being broken" but weak sender authentication plus a low-trust sending pattern. The first thing I would inspect is the sending domain setup: SPF, DKIM, DMARC, the From address, and whether Make.com is sending through a properly authenticated mail provider or a generic shared route.

Triage in the First Hour

1. Check one real message header from Gmail or Outlook.

• Look for SPF pass/fail.
• Look for DKIM pass/fail.
• Look for DMARC alignment.
• Confirm the actual sending service and envelope-from domain.

2. Inspect the Make.com scenario that sends email.

• Identify the exact module used for sending.
• Check whether it uses a shared SMTP service, Gmail connection, SendGrid, Mailgun, Postmark, or another provider.
• Confirm there are no duplicate sends or retry loops.

3. Review DNS records for the sending domain.

• SPF record exists and is not too long.
• DKIM record exists and matches the provider.
• DMARC record exists with at least monitoring enabled.

4. Check Airtable fields feeding the email content.

• Look for empty subject lines.
• Look for spammy phrases in templates.
• Check if dynamic fields sometimes inject broken HTML or strange text.

5. Review recent delivery patterns.

• Sudden spike in volume?
• New domain?
• New subdomain?
• New sender name?
• Any bounce complaints or unsubscribe signals?

6. Inspect any Cloudflare or DNS changes made recently.

• Wrong MX records can break adjacent mail flows.
• Proxy settings should not interfere with mail-related subdomains.

7. Open inbox placement tests on 2-3 seed accounts.

• Gmail
• Outlook
• Apple Mail if available

8. Check whether transactional and marketing mail are mixed together.

• If marketplace alerts and newsletters share one sender identity, reputation drops faster.

dig txt yourdomain.com
dig txt _dmarc.yourdomain.com
dig txt selector1._domainkey.yourdomain.com

Root Causes

| Likely cause | What it looks like | How to confirm | |---|---|---| | SPF missing or wrong | Messages fail auth or show "via" in inbox | Check DNS TXT record and message headers | | DKIM missing or misaligned | SPF may pass but DMARC fails | Compare signing domain to From domain | | DMARC not set | Spoofing risk and weak trust signals | No _dmarc TXT record or policy set to none forever | | Shared sender reputation | Some emails land in spam even with correct setup | Provider uses shared IP/domain with poor reputation | | Bad content pattern | Subject/body triggers filters | Spammy wording, too many links, broken HTML, image-heavy layout | | Poor list hygiene | Low engagement and high bounce rates | Old test addresses, invalid users, repeated retries |

1. SPF is missing, broken, or too broad

If SPF does not include the actual sender used by Make.com, mailbox providers cannot trust the message. If it includes too many services or exceeds lookup limits, it can fail silently.

I confirm this by checking the raw headers of a delivered message and comparing them to DNS TXT records.

2. DKIM is absent or signed by the wrong domain

DKIM proves the message was authorized by your domain. If Make.com sends through a provider that signs with its own domain instead of yours, DMARC alignment can fail even when SPF passes.

I confirm this by checking `dkim=pass` and matching the signing domain to your brand domain.

3. DMARC is missing or left on monitor-only forever

Without DMARC, mailbox providers have less confidence that your messages are legitimate. For a marketplace MVP handling bookings and notifications, that weakens trust fast.

I confirm this by checking whether `_dmarc.yourdomain.com` exists and whether policy is `none`, `quarantine`, or `reject`.

4. The sender identity looks low-trust

Using `no-reply@`, random names, free domains like Gmail/Yahoo for product mail, or inconsistent From names hurts deliverability. Users also engage less when they do not recognize who sent the email.

I confirm this by comparing From name consistency across all automated emails.

5. Make.com logic is creating noisy send behavior

A scenario that retries too aggressively can send duplicates or bursts of similar messages. That pattern looks suspicious to mailbox providers and also annoys users.

I confirm this by reviewing execution history in Make.com for duplicate runs, failed retries, and branching errors.

6. The content itself is getting flagged

Marketplace MVPs often send short transactional messages with thin bodies like "Your booking is confirmed". That can be fine if authenticated correctly, but spam filters may still dislike broken HTML, URL shorteners, image-only layouts, or aggressive CTA language.

I confirm this by testing multiple subject lines and body variants while keeping authentication constant.

The Fix Plan

My approach is to fix trust first, then content second, then automation hygiene last. I would not keep tweaking copy before authentication is clean because that wastes time and hides the real issue.

1. Lock down sender architecture.

• Use one dedicated sending domain or subdomain like `mail.yourdomain.com`.
• Separate transactional mail from marketing mail.
• Stop using any free mailbox as the production sender.

2. Fix DNS authentication in this order:

• SPF: authorize only the actual provider used by Make.com.
• DKIM: enable signing with your own domain if supported.
• DMARC: start with monitoring if needed, then move toward enforcement after verification.

3. Clean up Make.com scenarios.

• Remove duplicate send branches.
• Add deduplication checks using Airtable record IDs or message IDs.
• Add error handling so retries do not resend identical messages without control.

4. Normalize email templates.

• Use plain text plus light HTML.
• Keep subject lines clear and specific.
• Remove excessive links, all-caps text, urgency spam phrases, and broken merge fields.

5. Verify Airtable data quality before send.

• Validate recipient email format.
• Block empty subjects and blank bodies.
• Ensure dynamic fields cannot inject malformed HTML into templates.

6. Warm up cautiously if volume changed recently.

• If you just launched or changed domains/providers, start with low volume to engaged recipients first.
• Do not blast every user at once if reputation is still cold.

7. Add monitoring before declaring victory.

• Track delivery failures, bounces, open rate trends where available, complaint signals if supported by your provider, and scenario error logs in Make.com.

8. Keep security tight while touching email infrastructure.

• Rotate exposed secrets if any were stored inside scenarios or shared docs.
• Store API keys only in approved secret managers or platform vaults where possible.
• Limit who can edit DNS and automation scenarios because accidental changes can break deliverability again.

Regression Tests Before Redeploy

Before I ship this fix back into production traffic, I want proof that it works across providers and edge cases.

• Send test emails to Gmail, Outlook/Hotmail, Yahoo/AOL if possible.
• Confirm inbox placement on at least 3 seed accounts instead of relying on one inbox only.
• Verify SPF passes on every test message header.
• Verify DKIM passes on every test message header.
• Verify DMARC alignment passes for the visible From domain.
• Confirm no duplicate sends happen when a scenario re-runs once after failure.
• Test empty Airtable fields:

1. blank subject 2. missing first name 3. missing booking reference

• Test invalid recipient input:

1. malformed email address 2. disposable address if your policy blocks it

• Test mobile rendering on iPhone and Android widths because broken layout can reduce trust even when delivery succeeds.
• Confirm unsubscribe links work if applicable to non-transactional mail.
• Confirm logs show one message ID per intended send only.

Acceptance criteria:

• At least 90 percent of seeded test emails land in inboxes instead of spam during validation runs.
• No duplicate transactional sends across repeated scenario executions over 20 test runs.
• SPF/DKIM/DMARC all pass on headers for approved sending domains.
• Airtable validation blocks bad inputs before they reach Make.com send modules.

Prevention

I would put guardrails around both deliverability and operational risk so this does not come back two weeks later after another workflow change.

• Monitoring:
• Set alerts for failed sends above a threshold like 5 failures per hour.
• Track bounce spikes daily during launch week.
• Watch Make.com execution errors every morning until traffic stabilizes.

• Code review discipline:
• Any change to templates must be reviewed for merge-field safety and duplicate-send risk before release.
• Any new automation path must be checked against existing sender identity rules.

• Security controls:
• Treat DNS credentials as sensitive access because an attacker could redirect mail flow or damage reputation through misconfiguration.
• Use least privilege for who can edit Make.com scenarios and Airtable bases tied to production mail flows.

• UX safeguards:
• Tell users what email address should receive important marketplace messages right after signup or checkout confirmation page submission failure recovery paths matter here too; if they miss an email they need a visible resend option inside the app/admin panel rather than opening support tickets immediately.

• Performance guardrails:
• Keep template generation lightweight so Make.com scenarios do not time out under load from Airtable lookups plus formatting steps plus external API calls all at once; slow automations often create retries that look like spam bursts later on.

When to Use Launch Ready

Use Launch Ready when you need me to fix this fast without turning it into a month-long cleanup project.

This sprint fits best when:

• You already have a working MVP in Make.com + Airtable but email trust is hurting conversion,
• You need one senior engineer to diagnose root cause instead of guessing,
• You want production-safe changes without breaking other automations,
• You need clear handoff notes so your team can maintain it after launch,

What I need from you before I start:

• Access to DNS registrar and Cloudflare,
• Access to Make.com scenario editor,
• Access to Airtable base,
• Current sending provider login if one exists,
• A few example emails that landed in spam,
• At least one affected recipient inbox for testing,

My goal is simple: get your marketplace emails trusted again without introducing new failure modes in onboarding bookings payments or support flows .

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. Roadmap.sh QA: https://roadmap.sh/qa 4. Google Email Sender Guidelines: https://support.google.com/a/answer/81126?hl=en 5. Microsoft Sender Support: https://sendersupport.olc.protection.outlook.com/

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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.*