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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).

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Login to Squarespace

Login to your Squarespace domains page and click on your domain. Domain Details

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Add MX SPF Record

Scroll down to the Custom records section and select Add record on Squarespace.
  1. Type send for the Host of the record.
  2. Set the Type to MX.
  3. Set the Priority to 10.
  4. Use the Default 4 hours for TTL.
  5. Copy the MX Value from Resend into the Mail Server field
  6. Select Save.
Domain Details Domain Details Below is a mapping of the record fields from Resend to Squarespace:
SquarespaceResendExample Value
TypeTypeMX
HostNamesend
TTL-4 hrs (default)
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

In the same Custom records section, select Add Record on Squarespace.
  1. Type send for the Host of the record.
  2. Set the Type to TXT.
  3. Use the Default 4 hours for TTL.
  4. Copy the TXT Value from Resend into the Text field
  5. Select Save.
Add the TXT Record from your domain in Resend to Squarespace and click “Save”. Domain Details
Domain Details Below is a mapping of the record fields from Resend to Squarespace:
SquarespaceResendExample Value
TypeTypeTXT
HostNamesend
TTL-4 hrs (default)
TextValue"v=spf1 include:amazonses.com ~all"
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

In the same Custom records section, select Add Record on Squarespace.
  1. Type resend._domainkey for the Host of the record.
  2. Set the Type to TXT.
  3. Use the Default 4 hours for TTL.
  4. Copy the TXT Value from Resend into the Text field
  5. Select Save.
Domain Details Domain Details Below is a mapping of the record fields from Resend to Squarespace:
SquarespaceResendExample Value
TypeTypeTXT
HostNameresend._domainkey
TTL-4 hrs (default)
TextValuep=MIGfMA0GCSqGSIbRL/a21QojogA+rYqIQXB/3DQEBDAQAB
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.