Set up sender details for Email Campaigns

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Set up sender details for Email Campaigns

Last updated October 19, 2026 16:26

Create and verify your sender email address and domain.

Your sender details are the email address and name that appear in the “From:” line of your Email Campaigns. Verifying them is what keeps your campaigns out of subscribers' spam folders.

Start with a Squarespace domain

Domains that are registered through or managed by Squarespace verify automatically, which means you don't have to update their DNS settings. If you don't have a domain yet, follow these steps for the quickest experience:

1. Register your new domain through Squarespace or transfer an existing domain to Squarespace (this can take up to 15 days).
2. Set up a custom email address for that domain with Google Workspace.
3. Create your sender details, then verify your email.

Create sender details

Create sender details after you start an Email Campaigns draft.

Use a custom email

You need to use a custom email for your sender details if your monthly send limit is over 250,000. Even if you send less than that, you should still use a custom email. Major email providers, like Google, often reject bulk emails sent by free email services, like Gmail. Using a custom email helps your campaigns avoid spam filters.

Use accurate information

Use accurate information in your sender details. Including misleading information in your campaigns may violate legal requirements, such as CAN-SPAM.

Don't use an email forwarding alias

You can't verify an email forwarding alias when setting up sender details. Use an address with its own inbox instead.

Add a sender

To add a sender:

1. If you haven't already, create a draft.
2. Open the Email Campaign settings panel.
3. Click the icon, then click Add Sender.
4. Enter a sender name. This name is public and visible to people who receive your campaigns.
5. Add the email address you want your campaigns to send from. If you use a Gmail address, Squarespace generates a unique “From:” address to help prevent delivery issues, but we strongly recommend using a custom domain email address for best results. Some free email providers aren't supported.
6. Click Next.

Verify your email address

You'll be prompted to verify your email address:

1. Click Verify email. To do this later, click Skip, then return to your sender details when you’re ready.
2. An email is sent to the address you added to confirm it’s valid and that you have access to it.
3. Open your email and copy the code into the sender details window.
4. Click next.

If you didn't receive the verification email

If the verification email doesn't appear in your inbox, check your spam folder and look for an email from no-reply@squarespace.com.

Verify your third party domain

If you bought your email's domain from a third-party provider and you used a custom domain email address for your sender details, you'll be prompted to verify your domain. Follow these steps to verify your third-party domain. If you have a Squarespace domain, it's automatically verified, and you don't need to do anything else to create your sender details.

Verify your domain later

If you don't want to verify your domain now, click I'll Do This Later. To enter it later, find your sender details, then click Verify Domain.

Don't wait to verify domains with DMARC set to p=reject

If your domain has a DMARC policy set to p=reject, you can't use the sender details until you verify the domain. If you're not sure about your domain's DMARC policies, contact your domain provider.

Verify a Squarespace domain that's connected to a different site

To verify a Squarespace domain that's connected to a different site, verify it on that site first, or add it as a third-party domain.

Fix a failed domain verification

If your domain verification fails because records are missing or incomplete, try these fixes.

Delete and recreate the sender details

Delete and recreate your sender details to automatically verify your Squarespace domain.

Check your DNS records

Ensure your domain has the required DNS records for Email Campaigns.

1. Open your domains dashboard and click the domain you're trying to verify.
2. Click DNS, then DNS settings.
3. Look for the Email Campaigns preset records. If they don't appear, add them.
4. Click Preset, then select Squarespace Email Campaigns. It can take up to 48 hours for these changes to take effect.

Can I add multiple senders?

You can create up to ten sets of sender details, but you can only send from one at a time. If you have multiple sender details, the last address you added and verified is the default sender when you create a campaign.

Where do I add my mailing address?

The address that displays at the bottom of every campaign isn't part of your sender details. You'll add it when sending your campaign.

Error messages for free email addresses

We strongly recommend using a custom email. If you use a free email address, you might get one of these errors.

Error message: Emails from [domain] will be sent to spam. To ensure delivery, emails will be sent from [Sender details name] [Squarespace-generated email address]

If you use a free email address (like Gmail) and you have an unverified domain, Squarespace will use a custom “From:” address using sqspmail.com.

For example, if your sender details email address is yourname@gmail.com, Squarespace will use an address like yourname.gmail.com@abc123.sqspmail.com to appear in the “From:” field. Your subscribers can see this.

Error message: You cannot use sender details with a [provider] email address

Some free email addresses are almost always rejected by inboxes. This error appears if you set up sender details with one of these domains or their subdomains:

• aol.com
• bigpond.com
• centurylink.net
• icloud.com
• mac.com
• me.com
• sqspmail.com
• squarespace.com
• squarespace-mail.com
• telstra.com
• yahoo.com

Edit the sender name

To edit the name that appears with sender details:

1. Open the Email Campaign settings panel.
2. Under Sender Details find the details you want to edit, click ... in the top-right corner, then click Edit.
3. Edit the name, then click Save.

Create a new sender to use a different email address

You can't edit the email address on sender details because you need to verify each email individually. Create new sender details instead.

Delete sender details

To delete sender details:

1. Open the Email Campaign settings panel.
2. Under Sender Details, find the details you want to delete and click ... in the top-right corner.
3. Click Delete, then click Delete again to confirm.

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Set up sender details for Email Campaigns