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Add Domain to Resend

First, log in to your Resend Account and add a domain. Domain Details
It is best practice to use a subdomain (updates.example.com) instead of the root domain (example.com). This allows for proper reputation segmentation based on topics or purpose (e.g. transactional and marketing).
The fastest way to verify your domain on Cloudflare is using the Sign in to Cloudflare button on Resend. This uses Domain Connect to automatically configure your DNS records.
  1. Go to your Domains page in Resend.
  2. Click Sign in to Cloudflare next to your domain.
  3. Authorize Resend to access your Cloudflare DNS settings.
  4. The DNS records will be added automatically.
That’s it. Your domain will be verified within a few minutes.

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Manual Setup

If you prefer to add DNS records manually, follow these steps.

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Log in to Cloudflare

Log in to your Cloudflare account and go to the DNS Records of your domain. Domain Details

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Add MX SPF Record

Click “Add Record” on Cloudflare:
  1. Set the Type to MX.
  2. Type send for the Name of the record.
  3. Copy the MX Value from Resend into the Mail Server field.
  4. Use the default Auto for TTL.
  5. Add 10 for the Priority.
  6. Select Save.
Domain Details
Domain Details Below is a mapping of the record fields from Resend to Cloudflare:
CloudflareResendExample Value
TypeTypeMX
NameNamesend
Mail ServerValuefeedback-smtp.us-east-1.amazonses.com
PriorityPriority10
Omit your domain from the record values in Resend when you paste. Instead of send.example.com, paste only send (or send.subdomain if you’re using a subdomain).
Do not use the same priority for multiple records. If Priority 10 is already in use, try a number slightly higher like 11 or 12.

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Add TXT SPF Record

Click “Add Record” on Cloudflare:
  1. Set the Type to TXT.
  2. Type send for the Name of the record.
  3. Copy the TXT Value Resend into Content field.
  4. Use the default Auto for TTL.
  5. Select Save.
Domain Details
Domain Details Below is a mapping of the record fields from Resend to Cloudflare:
CloudflareResendExample Value
TypeTypeTXT
NameNamesend
ContentValue"v=spf1 include:amazonses.com ~all"
TTL-Auto
Omit your domain from the record values in Resend when you paste. Instead of send.example.com, paste only send (or send.subdomain if you’re using a subdomain).

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Add TXT DKIM Records

Click “Add Record” on Cloudflare:
  1. Set the Type to TXT.
  2. Type resend._domainkey for the Name of the record.
  3. Copy the TXT Value Resend into Content field.
  4. Use the default Auto for TTL.
  5. Select Save.
Domain Details
Domain Details Below is a mapping of the record fields from Resend to Cloudflare:
CloudflareResendExample Value
TypeTypeTXT
NameNameresend._domainkey
TargetValuep=example_demain_key_value
Proxy Status-DNS Only (disabled)
TTL-Auto
Omit your domain from the record values in Resend when you paste. Instead of resend._domainkey.example.com, paste only resend._domainkey (or resend._domainkey.subdomain if you’re using a subdomain).

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Complete Verification

Now click Verify DNS Records on your Domain in Resend. It may take up to 72 hours to complete the verification process (often much faster).

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Troubleshooting

If your domain is not successfully verified, these are some common troubleshooting methods.
Confirm your proxy settings are set to DNS Only on the record you are adding.
Review the records you added to Cloudflare to rule out copy and paste errors.