Domain History: If the domain was previously registered and had a bad reputation or was used for spammy activities, Moz might carry over that history, flagging it with a higher Spam Score.
Poor Quality Backlinks: If low-quality or spammy websites are linking to your new domain, even unintentionally, Moz can detect this and assign a higher Spam Score. It's important to check your backlink profile using tools like Moz or Google Search Console.