AuthSMTP is a professional outgoing SMTP email service designed to enhance email delivery for businesses and individuals. It offers solutions for sending authenticated emails, ensuring higher deliverability and reducing the likelihood of emails being marked as spam. AuthSMTP supports a variety of devices and email clients, offering multiple SMTP ports and SSL/TLS encryption to secure communications. The service also provides features like email tracking, detailed delivery reports, and allows users to send emails through their existing applications.