How to Use

View emails sent to your temporary mailboxes.

What it is

This service lets you view emails delivered to temporary (disposable) mailboxes. Use any address of the form ******@cloudbasis.org for sign-ups, registrations, or anywhere you need to receive mail — then open this Viewer to read everything sent to that address.

Letter retention (TTL): Messages are stored temporarily and remain available for 30 minutes after receipt; after that they are automatically removed.

Request access

To request access, send an email to request-access@mailboxing.cloudbasis.org with the subject line Request Access. In your message, please include: how you learned about our service, what you plan to use it for, and the approximate number of requests you expect to make per day or per month.

Viewing emails in the browser

On the main page, enter:

The mailbox address ******@cloudbasis.org you used for sign-up or in forms
Your API key (the one issued to you)

Click Show Emails. The list of messages for that mailbox appears on the left; select one to read it on the right. Use the refresh button to reload the list.

Fetching emails via API (curl)

You can also request the list of emails with a simple POST request. Example:

curl -X POST https://mailboxing.cloudbasis.org/api/v1/email/fetch-letters \
  -H "Content-Type: application/json" \
  -H "x-api-key: YOUR_API_KEY" \
  -d '{"email":"your-inbox@cloudbasis.org"}'

Replace YOUR_API_KEY with your API key and your-inbox@cloudbasis.org with the mailbox you want to query.

Response structure

Success (200) returns JSON in this shape:

{
  "code": 200,
  "letters": [
    {
      "id": "uuid",
      "from": "sender@example.com",
      "to": "your-inbox@cloudbasis.org",
      "subject": "Subject line",
      "date": "2026-02-10T12:00:00Z",
      "received_at": "2026-02-10T12:00:01Z",
      "text_body": "Plain text content",
      "html_body": "<html>...</html>",
      "attachments": [
        {
          "filename": "file.pdf",
          "content_type": "application/pdf",
          "size": 12345,
          "data": "base64-encoded content..."
        }
      ]
    }
  ]
}

Need help?

See our Terms of Service and Privacy Policy. For support, visit mailboxing.cloudbasis.org or Contact Us.