# SMTP

The SecuMailer SMTP API is available at `mail-relay.secumail.cloud`. Connections are available on port `25` and port `587`. 

{% hint style="info" %}
Connections must use TLS v1.1 or higher.
{% endhint %}

The SMTP API uses SASL for authentication. SecuMailer will provide you with an username and password for the connection.

### Example

The following example shows how a connection can be made using PHPMailer, a popular mailer package for PHP.

```
$mail = new PHPMailer(true);

try {
    //Server settings
    $mail->isSMTP();                                    // Send using SMTP
    $mail->Host       = 'mail-relay.secumail.cloud';    // Set the SMTP server to send through
    $mail->SMTPAuth   = true;                           // Enable SMTP authentication
    $mail->Username   = 'user@example.com';             // SMTP username
    $mail->Password   = 'secret';                       // SMTP password
    $mail->SMTPSecure = PHPMailer::ENCRYPTION_STARTTLS; // Enable TLS encryption
    $mail->Port       = 587;                            // TCP port to connect to

    //Recipients
    $mail->setFrom('from@example.com', 'Mailer');
    $mail->addAddress('joe@example.net', 'Joe User');    // Add a recipient

    // Content
    $mail->isHTML(true);                                 // Set email format to HTML
    $mail->Subject = 'Here is the subject';
    $mail->Body    = 'This is the HTML message body <b>in bold!</b>';
    $mail->AltBody = 'This is the body in plain text for non-HTML mail clients';

    $mail->send();
    echo 'Message has been sent';
} catch (Exception $e) {
    echo "Message could not be sent. Mailer Error: {$mail->ErrorInfo}";
}
```


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

```
GET https://docs.secumailer.com/manuals/api/smtp.md?ask=<question>
```

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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.