# Attachments

Our programmatic email API supports attachments via [`multipart/form-data` requests](https://www.w3.org/TR/html401/interact/forms.html#h-17.13.4.2).

## Overview

* The attachment feature is only available to users who have [set up sending emails from their own domains](/email-api-guide/programmatic-email-api/custom-from-address.md). If your agency would like to set this up, [contact us](https://go.gov.sg/postman-contact-us).
* Each email can have up to 10 attachments.
* Each attachment should not exceed 2MB in size.
* The cumulative size of all attachments should not exceed 10MB.
* You can find the list of supported attachment file types below.

You will receive a `413` error if the requirements above are not met.

### Supported attachment file types

<details>

<summary><strong>List of supported attachment file types</strong></summary>

* `asc`
* `avi`
* `bmp`
* `csv`
* `dgn`
* `docx`
* `dwf`
* `dwg`
* `dxf`
* `ent`
* `gif`
* `jpeg`
* `jpg`
* `mpeg`
* `mpg`
* `mpp`
* `odb`
* `odf`
* `odg`
* `ods`
* `pdf`
* `png`
* `pptx`
* `rtf`
* `sxc`
* `sxd`
* `sxi`
* `sxw`
* `tif`
* `tiff`
* `txt`
* `wmv`
* `xlsx`

</details>

## Sample API calls

### API call with one attachment

```zsh
curl --location --request POST 'https://api.postman.gov.sg/v1/transactional/email/send' \
--header 'Authorization: Bearer your_api_key' \
--form 'body="<p>Hello <b>there</b></p>"' \
--form 'recipient="recipient@agency.gov.sg"' \
--form 'attachments=@"/your/local/path-to-file"' \
--form 'subject="Test email"'
--form 'from="user@agency.gov.sg"'
```

### API call with two attachments

```zsh
curl --location --request POST 'https://api.postman.gov.sg/v1/transactional/email/send' \
--header 'Authorization: Bearer your_api_key' \
--form 'body="<p>Hello <b>there</b></p>"' \
--form 'recipient="recipient@agency.gov.sg"' \
--form 'attachments=@"/your/local/path-to-file-1"' \
--form 'attachments=@"/your/local/path-to-file-2"' \
--form 'subject="Test email"'
--form 'from="user@agency.gov.sg"'
```

## Sample code

### JavaScript

```
const data = new FormData();
data.append("recipient", "recipient@agency.gov.sg");
data.append("subject", "Test email");
data.append("body", "<p>Hello <b>there</b></p>");
data.append("from", "user@agency.gov.sg");
data.append("attachments", "/your/local/path-to-file-1");
data.append("attachments", "/your/local/path-to-file-2");

const xhr = new XMLHttpRequest();
xhr.withCredentials = true;

xhr.addEventListener("readystatechange", function () {
  if (this.readyState === this.DONE) {
    console.log(this.responseText);
  }
});

xhr.open("POST", "https://api.postman.gov.sg/v1/transactional/email/send");
xhr.setRequestHeader("Authorization", "Bearer your_api_key");

xhr.send(data);
```


---

# Agent Instructions: Querying This Documentation

If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question.

Perform an HTTP GET request on the current page URL with the `ask` query parameter:

```
GET https://postman-v1.guides.gov.sg/email-api-guide/programmatic-email-api/send-email-api/attachments.md?ask=<question>
```

The question should be specific, self-contained, and written in natural language.
The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.

Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.