Setting Up Your Custom Domain in Our Portal

When setting up a custom domain for email campaigns through our portal, you’ll see requests for various DNS records. Here’s what each of these means and where to find them:

• MX Records (Mail Exchange): These records specify the mail servers responsible for receiving email messages on behalf of your domain. They help route incoming emails.

Where to find: Your domain hosting platform’s DNS settings (e.g., GoDaddy, Cloudflare, Bluehost).

Example: mxa.mailgun.org and mxb.mailgun.org

• SPF (Sender Policy Framework): This is a TXT record type that lists the servers authorized to send emails from your domain, preventing unauthorized use of your domain in spam.

Where to find: Provided by the email sending service you use (like Mailgun or SendGrid).

Example: v=spf1 include:mailgun.org ~all

• DKIM (DomainKeys Identified Mail): This record authenticates emails, proving they’re genuinely from your domain, which helps avoid being flagged as spam.

Where to find: Generated by your email sending provider (e.g., Mailgun dashboard under “Domain Settings”).

Example: A complex string starting with k=rsa; p=MIGfMA0GCS...

• Tracking Domain (CNAME): Used for tracking email opens, clicks, and improving deliverability. It typically appears as a subdomain pointing to your provider’s URL.

Where to find: Specified by your email service provider within their tracking setup area (often under “Domain Settings” or “Tracking”).

Example: email.revscale.com points to mailgun.org

Important Tips:

• If the domain is already configured with another provider like Mailgun, SendGrid, or Mailchimp, using it concurrently can cause conflicts leading to reduced sender reputation scores and emails being marked as spam. Consider using a separate dedicated domain if you run campaigns across multiple platforms.
• DNS records typically propagate (update globally) within minutes but can take up to 24 hours.
• Always verify records after updating your DNS to ensure everything is correctly set.
• Reach out to technical support if you encounter issues or are unsure about setting records correctly.

Updated on: 07/10/2025