API Mail is a low-cost transactional email service from E-AGENCY. It targets companies with high email volumes or existing platforms looking to reduce costs by switching only their email delivery system.

The platform connects directly to your customer databases for custom filtering and flexible delivery. Teams can schedule emails, send personalized messages, and retrieve error lists and delivery status.

The mail relay delivers transactional emails through integration with your existing systems. You can keep using your current email interface while switching only the delivery system to API Mail.

The service handles high-volume email per server. If you exceed your plan limits, it automatically upgrades to prevent delivery from stopping. Authentication includes email verification standards (SPF and DKIM) to improve deliverability. IP address restrictions let you control which systems can connect.

The website offers machine-translated versions in English, Chinese, Korean, French, and Vietnamese.