Resend·Fixdeployintermediate

Resend Emails Going to Spam

Quick Answer

How do I fix Resend Emails Going to Spam?

Sending from Resend's default domain (onboarding@resend.dev) instead of your own domain. No SPF/DKIM records. Start with "Add your domain to Resend" before making broader code changes.

Fix signals

What this answers: Why resend emails going to spam happens and what to change first.
Fastest move: Add your domain to Resend
Use this page if: Emails arrive in spam folder

If this keeps happening

Open the next decision, not just the patch

Use these when the current fix is helpful, but the real answer is a better tool choice, a cleaner workflow layer, or a more trustworthy launch path.

Deploy hub

Open this when the build error is one symptom and the bigger problem is your production handoff and hosting workflow.

Open this next →

Cursor review

Open this when deploy pain is pushing you toward a more code-first workflow with tighter control.

Open this next →

Lovable reviews

Open this when production friction is making you reconsider the tradeoff between generation speed and later cleanup cost.

Open this next →

Tool picker

Open this when the deploy pain is making you question the stack itself and you want a faster next recommendation.

Open this next →

Firecrawl review

Open this when the deployment problem is part of a broader stack rethink that also includes data-fetching and agent workflows.

Open this next →

Quick Fix Summary

Most likely cause	Sending from Resend's default domain (onboarding@resend.dev) instead of your own domain. No SPF/DKIM records.
Fastest fix	Add your domain to Resend
Use this page if	Emails arrive in spam folder

You're in the right place if...

!Emails arrive in spam folder
!Gmail shows warning on emails
!Low email deliverability

Why this happens

Sending from Resend's default domain (onboarding@resend.dev) instead of your own domain. No SPF/DKIM records.

Fix

Add your domain to Resend

Resend Dashboard → Domains → Add domain. Follow the DNS verification steps.

Send from your domain

Use your domain, not Resend's default:

await resend.emails.send({
  from: 'noreply@yourdomain.com', // NOT onboarding@resend.dev
  to: recipient,
  subject: 'Your subject',
  headers: {
    'List-Unsubscribe': '<mailto:unsubscribe@yourdomain.com>'
  }
})

Prevent this next time

Always verify your own domain in Resend before sending any emails. The default resend.dev domain has poor deliverability.