How does SMTP differ from an ESP?

**SMTP** providers offer delivery infrastructure. You build the email, manage the list, and handle campaign logic. They transmit what you send. ESPs provide complete platforms: templates, list management, scheduling, analytics, and delivery.

**SMTP** is lower-level: more control, more responsibility. You decide exactly what to send and when. You implement compliance features, manage bounces, and build analytics. **SMTP** fits technical teams building custom solutions.

ESPs are higher-level: less control, less responsibility. The platform handles many details automatically. You focus on content and strategy rather than infrastructure. ESPs fit marketing teams wanting ready-to-use solutions. Many organizations use both for different purposes.