If Shopify asks you to authenticate your sender email, use the records shown in your own store. Do not copy another business’s values or assume a DMARC record alone completes the setup.
Find the store’s current instructions
In Shopify, open Settings → Notifications and look for sender email and email domain authentication. Shopify currently offers automatic authentication for some providers and manual setup for others. Review what the chosen method will change.
Check DNS and DMARC
For manual authentication, follow the store’s CNAME instructions and review the domain’s DMARC record. Shopify’s automatic method does not itself configure DMARC. Other services may also send from your domain, so review them before changing an authentication policy.
Verify rather than guess
Keep a record of the existing DNS, make only the agreed changes and return to Shopify to check authentication. Use its exact current record values. A display change may take time; repeating or duplicating records is not a reliable fix.
Authentication helps receivers evaluate a message, but it does not guarantee inbox placement. Our email security and deliverability service covers related configuration questions.
Sources and further reading
Guidance checked 26 October 2026: Shopify’s sender-email authentication guide.