PUT
/v1/senders/:idUpdate sender
Updates a sender's name, from-email, or SMTP/IMAP credentials without deleting it. Any changed SMTP or IMAP fields are live-verified (and re-encrypted) before saving — same as connect, so this can never save unverified credentials. SMTP-only, same as connect.
Request
| Authorization | Bearer YOUR_API_KEY |
| Content-Type | application/json |
Parameters
| Field | Type | Required | Description |
|---|---|---|---|
| id | string | Required | Sender ID. |
| fromName, fromEmail, smtpHost, smtpPort, smtpUser, smtpPassword, imapHost, imapPort, imapUser, imapPassword | — | Optional | Any subset — only sent fields are changed. |
curl -X PUT "https://api.stynar.com/v1/senders/sender_abc123" \
-H "Authorization: Bearer esk_your_key_here" \
-H "Content-Type: application/json" \
-d '{"fromName":"Alex Kim"}'Response
✓ 200 OK
200 response
{
"senderId": "sender_abc123",
"fromName": "Alex Kim"
}Response fields
Errors
| Status | Code | Meaning |
|---|---|---|
| ✕ 404 Not Found | NOT_FOUND | Sender doesn't exist or isn't yours. |
| ✕ 401 Unauthorized | UNAUTHORIZED | Missing, malformed, unknown, revoked, or expired key. |
| ✕ 403 Forbidden | API_ACCESS_DISABLED | Your account doesn't currently have API access. |
| ✕ 403 Forbidden | INSUFFICIENT_SCOPE | The key doesn't have the scope this endpoint requires. |
| ✕ 404 Not Found | NOT_FOUND | Unknown route, or a resource that doesn't exist / isn't yours. |
| ✕ 409 Conflict | CONFLICT | The action can't be applied to the resource's current state. |
| ✕ 429 Too Many Requests | RATE_LIMIT_EXCEEDED | Per-minute or per-second limit hit. |
| ✕ 429 Too Many Requests | QUOTA_EXCEEDED | Monthly quota exhausted. |
| ✕ 500 Internal Server Error | INTERNAL_ERROR | Something broke on Stynar's end. |