Templates
Handlebars
Minimal logic template language used across email systems.
overview
Handlebars is a Mustache-compatible template language that compiles templates into JavaScript functions. It is not email-specific, but it is common in ESP template systems, internal notification renderers, and server-side email pipelines.
deliverability
Not applicable; template language only.
best for
Teams that need a small, stable variable and conditional layer inside an existing email renderer.
not great for
Teams expecting an end-to-end responsive email framework.
pros
- › Simple syntax with wide adoption
- › Mustache compatibility eases migration from simpler template systems
- › MIT-licensed and easy to embed in server-side renderers
cons
- › No email-client layout system, inliner, preview server, or compatibility layer
- › Helper sprawl can turn simple templates into application logic
- › Needs a separate HTML email framework for responsive layout
Features at a glance
| API | No |
| SMTP | No |
| SDKs | node |
| Webhooks | No |
| Templates | basic |
| React Email | No |
| Batch send | No |
| Scheduled send | No |
| Suppressions | No |
| Multi-tenant | No |
| Inbound parsing | No |
| Event stream | No |
| Idempotency keys | No |
| Dedicated IP | No |