Problem Integrating Brevo Email API with My Website for Transactional Emails

English Transactional
1

Hi everyone,

I’m using Brevo’s Email API to send transactional emails (like order confirmations and password resets) from my website. While the API integration is mostly working, I’ve encountered a few technical issues that I’m struggling to resolve:

  1. Email Delivery Delays: Some transactional emails are delayed by up to 5–10 minutes, even though they should be sent immediately. I’m using the /smtp/email endpoint and specifying transactional as the email type. Is there any configuration I need to adjust to ensure faster delivery?
  2. Error 401 Unauthorized: Occasionally, I receive a 401 Unauthorized error for API calls, even though the API key hasn’t been changed. Regenerating the API key resolves the issue temporarily, but it recurs after a few days.
  3. Tracking Clicks and Opens: I’ve enabled email tracking in the Brevo dashboard, but the statistics aren’t showing for the emails sent via the API. Do I need to include any additional headers or parameters in the API request to enable tracking?

Here’s a sample of my API request:

POST https://api.brevo.com/v3/smtp/email
Headers: {
    "api-key": "YOUR_API_KEY",
    "Content-Type": "application/json"
}
Body: {
    "sender": {"email": "noreply@mywebsite.com", "name": "My Website"},
    "to": [{"email": "user@example.com"}],
    "subject": "Your Order Confirmation",
    "htmlContent": "<p>Thank you for your order!</p>",
    "tags": ["order-confirmation"]
}

Has anyone experienced similar issues? Any advice on how to improve email delivery speed, resolve authentication errors, or ensure tracking works correctly?

Thank you!

2

Is there anyone who can help me with this? I would love your guidance. :slightly_smiling_face: :grinning: Thanks!