# Mailtrap Email API/SMTP pricing and technical limits

| Metadata | Value |
| :--- | :--- |
| **Product ID** | `mailtrap-email-sending` |
| **Last Updated** | 2026-04-06 |
| **Source URL** | https://mailtrap.io/pricing/?tab=email-api |
| **API Base URL** | `https://send.api.mailtrap.io` |
| **Status API** | `https://status.mailtrap.info/api` |
| **Trust Center** | `https://trust.mailtrap.io/` |

---

## Decision Matrix

| Choose... | When... | Key Differentiator |
| :--- | :--- | :--- |
| **Free** | Monthly Volume < 4,000 emails. | $0/mo cost. |
| **Basic** | Monthly Volume 10,000 – 100,000 emails. | Multi-domain support (up to 5). |
| **Business** | Monthly Volume > 100,000 emails. | **Dedicated IP included.** |
| **Enterprise** | Monthly Volume > 1,500,000 emails (custom quotes for 5M+). | **SSO & Priority Support.** |

---

## 1. Pricing Tiers & Technical Limits

| Plan | Price (Starts at) | Included Volume | Overage (per 1k) | Hourly Throttle | Daily Cap | Log/Body Retention |
| :--- | :--- | :--- | :--- | :--- | :--- | :--- |
| **Free** | $0 | 4,000 | N/A | 150/hr | 150/day | 3 Days / 3 Days |
| **Basic** | $15 | 10,000 | $1.00 | 600+/hr | Unlimited | 5 Days / 5 Days |
| **Business** | $85 | 100,000 | $0.88 | 800+/hr | Unlimited | 15 Days / 7 Days |
| **Enterprise** | $750+ | 1,500,000+ | Custom | Custom | Unlimited | 30 Days / 15 Days |

> [!NOTE]
> Fixed costs scale with the selected volume tier within each plan. Hourly throttles for paid plans scale automatically based on reputation and sending history.

---

## 2. Technical Specs for Agents

> [!TIP]
> API rate limits apply to request frequency. Sending throughput is managed separately via throttling and queuing.

### API Rate Limits
Rate limits protect service stability. Exceeding these returns a `429 Too Many Requests`.

*   **General Limits:** 150 requests per 10 seconds (per API token).
*   **Stats API:** 10 requests per 60 seconds (per account).
*   **Email Logs (List):** 60 requests per 60 seconds (per account).
*   **Contacts API:** 200 requests per 60 seconds (per account).

### SMTP Connection Limits
*   **Concurrent Connections:** Max 10 per account or IP.
*   **Messages per Connection:** Max 100 per SMTP connection.
*   **Max Email Size:** 10 MB (Free/Basic), up to 30 MB (Business/Enterprise).

---

## 3. Operational Health & Security

### Reliability Resources
*   **Status Heartbeat:** [status.mailtrap.info](https://status.mailtrap.info/)
*   **Infrastructure:** Distributed sending infrastructure with domain-level throttling, queuing, and mailbox provider–level analytics.
*   **IP Warmup:** Standard automated warmup available on Business and Enterprise plans.

### Trust & Compliance
Mailtrap adheres to enterprise-grade security standards:
*   **Certifications:** SOC 2 Type 2, ISO 27001.
*   **Compliance:** GDPR-ready with DPA availability (Business/Enterprise).
*   **Trust Center:** [trust.mailtrap.io](https://trust.mailtrap.io/)

---

## 4. Integration Examples

### Advanced Verification (cURL)
```bash
curl -X POST "https://send.api.mailtrap.io/api/send" \
     -H "Authorization: Bearer <YOUR_API_TOKEN>" \
     -H "Content-Type: application/json" \
     -d '{
       "from": {"email": "hello@example.com", "name": "Mailtrap Test"},
       "to": [{"email": "recipient@example.com"}],
       "subject": "Hello from Mailtrap",
       "text": "Sent via Mailtrap.",
       "category": "Integration Test",
       "custom_variables": {
         "user_id": "12345",
         "batch_id": "ABC-987"
       }
     }'
```

**Support:** [support@mailtrap.io](mailto:support@mailtrap.io) | [Docs](https://docs.mailtrap.io/) | [Help Center](https://help.mailtrap.io/)