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Add Domain to Resend

First, login to your Resend Account and add a domain.

It is a 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).

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Login to Vercel

Login to your Vercel account and select the Domains tab.

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Add MX SPF Record

Copy and paste the values in Resend to Vercel.

  1. Type send for the Name of the record in Vercel.
  2. Expand the Type dropdown and select MX.
  3. Copy the record value from Resend into the Value field in Vercel.
  4. Add 10 for the Priority.
  5. Select Add.

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).

Below is a mapping of the record fields from Resend to Vercel:

VercelResendExample Value
TypeTypeMX Record
NameNamesend
ValueValuefeedback-smtp.us-east-1.amazonses.com
TTL-Use Vercel default (60)
PriorityPriority10

Do not use the same priority for multiple records. If Priority 10 is already in use on another record, try a number slightly higher like 11 or 12.

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Add TXT SPF Record

In the same section, add another record in Vercel.

  1. Type send for the Name of the record.
  2. Expand the Type dropdown and select TXT.
  3. Copy the TXT record value from Resend into the Value field in Vercel.
  4. Use the default TTL of 60.
  5. Select Add.

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).

Below is a mapping of the record fields from Resend to Vercel:

VercelResendExample Value
TypeTypeTXT Record
NameNamesend
ValueValue"v=spf1 include:amazonses.com ~all"
TTL-Use Vercel default (60)

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Add TXT DKIM Records

In the same section, add another record in Vercel.

  1. Type resend._domainkey for the Name of the record.
  2. Expand the Type dropdown and select TXT.
  3. Copy the record value from Resend into the Value field in Vercel.

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).

Below is a mapping of the record fields from Resend to Vercel:

VercelResendExample Value
TypeTypeTXT Record
NameNameresend._domainkey
ValueValuep=MIGfMA0GCSqGSIbRL/a21QojogA+rYqIQXB/3DQEBDAQAB
TTL-Use Vercel default (60)

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Complete Verification

Now click Verify DNS Records on your Domain in Resend. It may take a few 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.