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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). Using a subdomain allows for proper reputation segmentation based on topics or purpose (e.g. marketing) and is especially important if receiving emails with Resend.

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Log in to Squarespace

Log in 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
TTLTTL4 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 higher value 20 or 30.

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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
TTLTTL4 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
TTLTTL4 hrs (default)
TextValuep=example_demain_key_value
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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Receiving Emails

If you want to receive emails at your domain, toggle the “Receiving” switch on the domain details page. Enable Receiving Emails for a verified domain
When you enable Inbound on a domain, Resend receives all emails sent to that specific domain depending on the priority of the MX record. For this reason, we strongly recommend verifying a subdomain (subdomain.example.com) instead of the root domain (example.com). Learn more about avoiding conflicts with your existing MX records.
Scroll down to the Custom records section and select Add record on Squarespace:
  1. Type inbound (or whatever your subdomain is) 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.
Below is a mapping of the record fields from Resend to Squarespace:
SquarespaceResendExample Value
TypeTypeMX
HostNameinbound
TTLTTL4 hrs (default)
Mail ServerContentinbound-smtp.us-east-1.amazonaws.com
PriorityPriority10
After verifying your domain, create a webhook to process incoming emails. For help setting up a webhook, how to access email data and attachments, forward emails, and more, see our guide on receiving emails with Resend.

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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.
Review the records you added to Squarespace to rule out copy and paste errors.