In this comprehensive guide, we dive deep into the features, ease of use, security, deliverability, and scalability of top SMTP server providers like Mailtrap, SendGrid, Amazon SES, Postmark, and, of course, Sinch Mailgun. Whether you're a developer testing emails or managing large-scale email programs, find out which provider is best for you., Postmark allows you to send your emails with high delivery rates. It also includes detailed statistics. In addition, Postmark can parse incoming emails which are forwarded back to your application. This gem is the official wrapper for the Postmark HTTP API., I'm trying to figure out how to send transactional email from my Rails 4 app. I have found tutorials for the postmark gem, but I'm struggling to close the gaps between what's assumed in the tutori, This post compares six popular email APIs: Mailgun, Mailtrap, Mailjet, Postmark, SendGrid, and Brevo (formerly Sendinblue) to help you make an informed decision. Before diving into the specifics of each service, consider these key factors: Deliverability: This is paramount., API Integration: Postmark’s API supports message streams, allowing you to manage and send emails through different streams programmatically. This is useful for developers who need to integrate email sending into their applications., .