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Use when sending transactional emails (welcome messages, order confirmations, password resets, receipts), notifications, or bulk emails via Resend API.
Passed 20 of 22 test cases with the skill, and 11 of 22 without it.
and 8 more in the full report
9 fixed12 passed either way2 still failing0 broke
Tokens, turns and time describe resource use, not a dollar price.
One of 8 test cases the skill fixed. Same model, same prompt, with and without the skill.
If an email sent via Resend results in a hard bounce, what action does Resend automatically take on subsequent send requests targeted at that same recipient email address?
| Checked | Without skill | With skill |
|---|---|---|
| The response explains that Resend automatically adds hard-bounced addresses to a suppression list. | Passed | Passed |
| The response states that Resend triggers the email.suppressed event when delivery to a suppressed address is attempted. | Missed | Passed |
The instructions your model reads when the skill loads.
Resend provides two endpoints for sending emails:
| Approach | Endpoint | Use Case |
|---|---|---|
| Single | POST /emails | Individual transactional emails, emails with attachments, scheduled sends |
| Batch | POST /emails/batch | Multiple distinct emails in one request (max 100), bulk notifications |
Choose batch when:
Choose single when:
Always implement these for production email sending. See references/best-practices.md for complete implementations.
Prevent duplicate emails when retrying failed requests.
| Key Facts | |
|---|---|
| Format (single) | <event-type>/<entity-id> (e.g., welcome-email/user-123) |
test cases passed, vs 11 / 22 without
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