Various content types can be engaging: - Newsletters: Share industry news, company updates, and valuable tips. - Promotional Emails: Announce sales, discounts, and special offers. - Transactional Emails: Provide order confirmations, shipping updates, and account information. - Event Invitations: Invite recipients to webinars, product launches, and other events. - Surveys and Feedback Requests: Engage your audience by asking for their opinions.