- Promotional Emails: These are designed to drive sales, sign-ups, or other conversions. They often feature special offers, discounts, or product announcements. - Transactional Emails: These are triggered by a customer's action and usually contain information about a transaction, such as order confirmations, receipts, or shipping notifications. - Lifecycle Emails: These are part of an automated sequence that guides a customer through the sales funnel, from lead nurturing to post-purchase follow-ups.