Postmark
Transactional emails
Last verified: 1 October 2026
Postmark is a transactional email service to send and track messages reliably, through a REST API and SMTP. The documentation mentions a sandbox mode for testing and official SDKs in several languages.
Services
- Sending via REST API and SMTP, including batches
- Bounce management and delivery tracking
- Email templates
- Inbound email processing
- Message streams for transactional and broadcast
Access requirements
Sandbox: Yes
Sources
- Postmark (new tab), verified on 1 October 2026Official site consulted