<a href=\"%1$s\" target=\"_blank\" rel=\"noopener noreferrer\">Mailgun</a> is a transactional email provider that offers a generous 3-month free trial. After that, it offers a 'Pay As You Grow' plan that allows you to pay for what you use without committing to a fixed monthly rate.<br><br>To get started, read our <a href=\"%2$s\" target=\"_blank\" rel=\"noopener noreferrer\">Mailgun documentation</a>.