Transactional emails are crucial for businesses to run smoothly and keep customers happy. Postmark, a transactional email service provider, helps thousands of people send out their transactional emails every day. To help businesses grow, Postmark shares eight examples of transactional email examples that must-haves include welcome emails, user invitation emails, password reset emails, payment invoice or receipt emails, payment failure notification emails, order confirmation emails, daily, weekly, and monthly digest emails, and enabling 2FA confirmation emails. These email examples provide tips on how to design each type of email to make a great impression, be extremely useful, and look like it's coming from the brand.