Custom email domain authentication helps prevent your email campaigns from being marked as spam. This guide explains how to authenticate a third-party domain for email campaigns.

Prerequisites:

• A custom email address matching your domain (e.g., [email protected])
• Access to your domain's DNS settings
• Authentication records from your email campaign settings

Authentication Steps:

1. Find Authentication Records

• Open Email Campaign Settings
• Navigate to Sender Information
• Click Authenticate
• Note the two required DNS records

2. Add DNS Records Create these two records in your domain's DNS settings:

First Record:

• Type: CNAME
• Host: squarespace._domainkey
• Data: squarespace-domainkey.squarespace-mail.com

Second Record:

• Type: TXT
• Host: _dmarc
• Data: [unique code provided in settings]

Provider-Specific Instructions:

IONOS:

• Login to my.ionos.com/domains
• Select domain > Domain Details
• Click DNS > Add Record
• Add CNAME and TXT records

GoDaddy:

• Login to dashboard.godaddy.com
• Access Domain Settings > Manage DNS
• Add CNAME and TXT records under DNS Records

Google Domains:

• Login to domains.google
• Click DNS icon
• Add records under Custom resource records

Hover:

• Login to hover.com
• Click DNS > Add Record
• Add both required records

Namecheap:

• Login to namecheap.com
• Navigate to Domain List > Manage
• Access Advanced DNS Records
• Add both required records

Important Notes:

• DNS changes may take up to 72 hours to resolve
• Authentication is complete when "Domain not authenticated" message disappears
• Contact your domain provider's support for specific assistance
• If DMARC policy is set to p=reject, domain must be authenticated before use

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