> ## Documentation Index
> Fetch the complete documentation index at: https://projectdiscovery-new-js-docs.mintlify.site/llms.txt
> Use this file to discover all available pages before exploring further.

# Smtp.SMTPClient

# Class: SMTPClient

[smtp](/templates/protocols/javascript/modules/smtp).SMTPClient

SMTPClient is a minimal SMTP client for nuclei scripts.

**`Example`**

```javascript
const smtp = require('nuclei/smtp');
const client = new smtp.Client();
```

## Table of contents

### Constructors

* [constructor](/templates/protocols/javascript/modules/smtp.SMTPClient#constructor)

### Methods

* [IsOpenRelay](/templates/protocols/javascript/modules/smtp.SMTPClient#isopenrelay)
* [IsSMTP](/templates/protocols/javascript/modules/smtp.SMTPClient#issmtp)
* [SendMail](/templates/protocols/javascript/modules/smtp.SMTPClient#sendmail)

## Constructors

### constructor

• **new SMTPClient**(): [`SMTPClient`](/templates/protocols/javascript/modules/smtp.SMTPClient)

#### Returns

[`SMTPClient`](/templates/protocols/javascript/modules/smtp.SMTPClient)

#### Defined in

smtp.ts:15

## Methods

### IsOpenRelay

▸ **IsOpenRelay**(`host`, `port`, `msg`): `boolean`

IsOpenRelay checks if a host is an open relay.

#### Parameters

| Name   | Type                                                                      |
| :----- | :------------------------------------------------------------------------ |
| `host` | `string`                                                                  |
| `port` | `number`                                                                  |
| `msg`  | [`SMTPMessage`](/templates/protocols/javascript/modules/smtp.SMTPMessage) |

#### Returns

`boolean`

**`Example`**

```javascript
const smtp = require('nuclei/smtp');
const message = new smtp.SMTPMessage();
message.From('xyz@projectdiscovery.io');
message.To('xyz2@projectdiscoveyr.io');
message.Subject('hello');
message.Body('hello');
const isRelay = smtp.IsOpenRelay('acme.com', 25, message);
```

#### Defined in

smtp.ts:43

***

### IsSMTP

▸ **IsSMTP**(`host`, `port`): [`IsSMTPResponse`](/templates/protocols/javascript/modules/smtp.IsSMTPResponse)

IsSMTP checks if a host is running a SMTP server.

#### Parameters

| Name   | Type     |
| :----- | :------- |
| `host` | `string` |
| `port` | `number` |

#### Returns

[`IsSMTPResponse`](/templates/protocols/javascript/modules/smtp.IsSMTPResponse)

**`Example`**

```javascript
const smtp = require('nuclei/smtp');
const isSMTP = smtp.IsSMTP('acme.com', 25);
log(toJSON(isSMTP));
```

#### Defined in

smtp.ts:25

***

### SendMail

▸ **SendMail**(`host`, `port`, `msg`): `boolean`

SendMail sends an email using the SMTP protocol.

#### Parameters

| Name   | Type                                                                      |
| :----- | :------------------------------------------------------------------------ |
| `host` | `string`                                                                  |
| `port` | `string`                                                                  |
| `msg`  | [`SMTPMessage`](/templates/protocols/javascript/modules/smtp.SMTPMessage) |

#### Returns

`boolean`

**`Example`**

```javascript
const smtp = require('nuclei/smtp');
const message = new smtp.SMTPMessage();
message.From('xyz@projectdiscovery.io');
message.To('xyz2@projectdiscoveyr.io');
message.Subject('hello');
message.Body('hello');
const isSent = smtp.SendMail('acme.com', 25, message);
```

#### Defined in

smtp.ts:61