Bulk email refers to the practice of sending mass email campaigns to multiple recipients simultaneously, typically used for marketing, promotions, newsletters, or transactional communications. Businesses use bulk email to engage customers, announce product launches, share updates, or send personalized offers. CRMs integrate email automation tools that enable segmentation, personalization, and A/B testing to optimize open rates and engagement. Bulk email best practices include maintaining a clean email list, avoiding spam filters, and ensuring compliance with regulations like GDPR and CAN-SPAM. Effective bulk email strategies improve brand awareness, customer engagement, and conversion rates while reducing marketing costs.