How to set up List-Unsubscribe on Squarespace

Step by step List-Unsubscribe setup for Squarespace: complete instructions, examples, verification commands, and common pitfalls.

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This is a reference guide for configuring List-Unsubscribe on Squarespace. Use it while editing DNS or when troubleshooting deliverability.

Tip: Here’s a reliable, copy-pasteable way to set up List-Unsubscribe using Squarespace. Then verify everything with the InboxGreen Free Checker.

Provider-specific notes for Squarespace

  • Squarespace domains include a DNS Records section in Settings. For external domains pointed at Squarespace, add TXT records at your registrar.
  • Squarespace Email Campaigns generates its own SPF and DKIM values. If you also use an external ESP, merge the SPF includes rather than creating a second record.
  • Squarespace → Settings → Domains → Edit → Advanced settings → External DNS.

What is List-Unsubscribe?

List-Unsubscribe is a message header that gives inboxes a safe, machine readable way to unsubscribe. Gmail and Outlook often show a clear unsubscribe link when it is present and valid, which reduces spam complaints and protects your sender reputation.

How to enable it in practice

  1. In your sending platform, enable the List-Unsubscribe header or macro in templates.
  2. Use a one click HTTPS link as the main method, with a mailto address as fallback.
  3. Test by sending to a Gmail address and checking “Show original”.

Example headers

List-Unsubscribe: <https://yourdomain.com/u/abcd1234>, <mailto:[email protected]?subject=unsubscribe>
List-Unsubscribe-Post: List-Unsubscribe=One-Click

Common mistakes

  • Using a broken or redirected unsubscribe link that fails when clicked.
  • Only providing a mailto address without a one click URL.
  • Failing to apply the unsubscribe globally across lists and tools.

Related for Squarespace

quick_reference_all Set up SPF on Squarespace quick_reference_all Set up DKIM on Squarespace quick_reference_all Set up DMARC on Squarespace
Pro tip: Turn on InboxGreen Monitoring to check these records daily and get alerts if something breaks.

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