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Resend: messaging features and setup
An API for developers to send transactional and marketing emails.
Tool by the Otomatzia editorial team · source content checked on
Overview
Resend is a good fit when an app needs to send email through an API, such as an action confirmation or system notification, without managing a mail server. It is aimed at developers and includes tools for templates and delivery tracking in code. Before sending to customers, verify your domain, check the spam folder, and separate operational email from campaigns. A successful API request does not mean the recipient opened the email.
Features
- An email-sending API for developers
- Templates and delivery tracking
- Support for sending operational and marketing messages
Business uses
- Sending a confirmation after a website form is submitted
- Sending a system notification when a background task finishes
Getting started
- Verify a test domain and send an email to an inbox you control.
- Check that it arrives in the inbox, not the spam folder.
- Test with an invalid address and check the recorded result.
What to check
- Separate operational lists from campaigns to honor unsubscribe requests.
- Avoid putting sensitive content in an email body when a secure link will do.
Sources to check next
Vendor features and prices change. Confirm details on the linked official pages before you rely on them.