Cursor·FixdeployResendintermediate

Cursor Resend Emails Going To Spam On Launch

Quick Answer

The app is sending from an unverified domain, missing DNS records, or using default sender addresses that do not build trust with mailbox providers. Resend is working, but deliverability is weak. Start with "Verify your sending domain in Resend" before making broader code changes.

You're in the right place if...

!Emails are sent, but they land in spam
!Gmail warns that the message looks suspicious
!Delivery works, but open rates are near zero

Why this happens

The app is sending from an unverified domain, missing DNS records, or using default sender addresses that do not build trust with mailbox providers. Resend is working, but deliverability is weak.

Fix

Verify your sending domain in Resend

Add the real production domain you want to send from and complete the DNS verification steps in Resend.

Use a domain-based sender address

Do not keep sending from a temporary onboarding address if this is a production workflow.

from: 'noreply@yourdomain.com'
reply_to: 'you@yourdomain.com'

Update the email templates in Cursor

Make sure the app uses the verified sender address consistently and sends clean transactional content.

Copy this prompt

Resend emails are reaching inboxes as spam.
Please update the email sending code to use a verified domain sender address, simplify the template markup, and avoid spammy subject lines.

Prevent this next time

Set up domain verification before launch, not after users start receiving transactional mail from a temporary sender.