Send Email

Send highly deliverable transactional and marketing emails with rich formatting, attachments, and engagement tracking.

Rich HTML & Text Support

Send beautiful HTML emails with fallback plain-text content automatically generated

Dynamic Templates

Pass dynamic variables directly to your pre-configured email templates

Domain Verification

Ensure high deliverability by sending only from authenticated domains (DKIM, SPF)

Engagement Tracking

Track opens, clicks, bounces, and complaints in real-time

Authentication Required

Use Basic Authwith the precomputed Base64 token from your dashboard. Copy the token directly and set it in the `Authorization` header as `Basic <token>`.

Avg Delivery Time

< 2s

To inbox

Cost per Email

₵0.01

Volume discounts apply

Max Size

10MB

Including attachments

Rate Limit

50/s

per API key

POST

/v1/email/send

Core

Stable

Request Body

application/json

JSON

{
  "to": "user@example.com",
  "from": "noreply@yourdomain.com",
  "fromName": "Acme",
  "subject": "Welcome to Sendexa!",
  "html": "<h1>Hello!</h1><p>Welcome to our platform.</p>",
  "text": "Hello! Welcome to our platform.",
  "tags": ["onboarding"],
  "replyTo": "support@yourdomain.com"
}

Response

JSON

{
  "success": true,
  "message": "Email sent successfully",
  "messageId": "a1b2c3d4-e5f6-7890-abcd-ef1234567890",
  "data": {
    "messageId": "a1b2c3d4-e5f6-7890-abcd-ef1234567890",
    "providerMessageId": "re_xxxxxxxxxxxx",
    "to": ["user@example.com"],
    "suppressedCount": 0,
    "cost": 0.0001
  }
}

Try It Yourself

POST

https://api.sendexa.co/v1/email/send

Code Examples

Bash

curl -X POST 'https://api.sendexa.co/v1/email/send' \
  -H 'Content-Type: application/json' \
  -H 'Authorization: Basic YOUR_DASHBOARD_BASE64_TOKEN' \
  -d '{
    "to": "user@example.com",
    "from": "noreply@yourdomain.com",
    "subject": "Hello from Sendexa!",
    "html": "<p>Welcome to our platform!</p>"
  }'

Rate Limits

Burst limit for peak traffic

50 requests per second

Sustained rate limit

2000 requests per minute

HTTP Status Codes

Code	Status	Description
200	OK	Email queued successfully
400	Bad Request	Invalid email address or missing parameters
401	Unauthorized	Invalid or missing API credentials
403	Forbidden	Sending domain not verified or insufficient credits
429	Too Many Requests	Rate limit exceeded

Best Practices

Always authenticate your sending domains (SPF, DKIM, DMARC) for better deliverability.
Provide both HTML and plain-text versions of your emails.
Keep attachments small or link to external hosted files.
Listen to webhooks for bounces and handle them properly by removing invalid emails from your lists.