Decreased Deliverability: Email providers like Gmail and Yahoo use sophisticated filters to detect and block spam. If your emails are flagged as spam, they may never reach the recipient's inbox. Reduced Open Rates: When recipients receive too many spam emails, they are less likely to open any emails, including legitimate ones. Legal Consequences: Sending unsolicited emails can result in legal actions under regulations like CAN-SPAM Act and GDPR. Brand Reputation: Being labeled as a spammer can severely damage your brand's reputation, leading to a loss of customer trust.