Custom email authentication prevents your campaigns from being marked as spam. This process involves verifying your domain either through automatic verification (if registered through Squarespace) or manual verification for third-party domains.

For third-party domains, you have two options:

1. Transfer the domain to Squarespace for automatic verification
2. Manually add verification records to your domain's DNS settings

To manually verify your domain:

1. Access Email Campaigns settings and click "Authenticate" under Sender Details
2. Add two DNS records to your domain settings:
   • First Record (CNAME):
     • Type: CNAME
     • Host: squarespace._domainkey
     • Data: squarespace-domainkey.squarespace-mail.com
   • Second Record (TXT):
     • Type: TXT
     • Host: _dmarc
     • Data: [unique code provided in settings]

Provider-Specific Instructions:

IONOS:

• Login to my.ionos.com/domains
• Select domain > DNS > Add Record
• Enter CNAME and TXT records
• Save changes

GoDaddy:

• Access Domain Manager at dashboard.godaddy.com
• Navigate to Manage DNS
• Add both records under DNS Records
• Save changes

Google Domains:

• Login to domains.google
• Click DNS icon
• Add records under Custom Resource Records
• Save changes

Hover:

• Login to hover.com
• Click DNS > Add Record
• Enter both records
• Save changes

Namecheap:

• Access Account > Domain List
• Click Manage > Advanced DNS
• Add both records
• Save all changes

Note: DNS propagation may take up to 72 hours. Verification is successful when "Unauthenticated Domain" message disappears from sender details.

Contact your domain provider's support team if you need additional assistance with DNS settings.

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