Order confirmations can appear within a few seconds of checkout. Promotional emails may land days later with a new offer. Both go to the inbox, but they are for different things. Identifying the best email API provider is a matter of knowing transactional vs. marketing email, what they are used for, and the basics of reliable delivery. Here, we have examples and best practices for handling both at scale with Sinch. Different emails, different jobs Transactional emails are triggered by a user’s action or an account activity. They are types of emails such as password resets, receipts, shipping notifications, and security notifications. They exist to make a recipient do something or to keep them informed. Promotions are sales emails that market a product, service, event or deal. Here are some newsletters to our product announcements. The goal of these emails is to engage, drive action or retain subscribers. Receipts, for example, confirm purch...