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Users on platforms like Reddit and Hacker News frequently discuss the practicalities of setting up subdomains for marketing.

: Using a subdomain like marketing.yourdomain.com ensures that if a promotional campaign is flagged as spam, your root domain (and critical corporate emails) remains protected.

Industry experts generally recommend using subdomains specifically for .

: Subdomains allow for granular reputation management and easier DMARC/SPF configuration specifically for marketing streams.