PHP SDK email client

$paubox = new Paubox\Paubox();

$header = new Paubox\Mail\Header();
$header->setSubject("Your results are ready");   // required
$header->setFrom("sender@yourdomain.com");        // required
$header->setReplyTo("support@yourdomain.com");    // optional

$content = new Paubox\Mail\Content();
$content->setPlainText("Plain text body.");                       // at least one required
$content->setHtmlText("<p>HTML body.</p>");                       // optional; auto base64-encoded by SDK

$message = new Paubox\Mail\Message();
$message->setHeader($header);                                     // required
$message->setContent($content);                                   // required
$message->setRecipients(["alice@example.com"]);                   // required
$message->setCc(["manager@example.com"]);                         // optional
$message->setBcc(["audit@example.com"]);                          // optional
$message->setAttachments([$attachment]);                          // optional; see below
$message->setAllowNonTLS(false);                                  // optional; default false
$message->setForceSecureNotification("true");                     // optional

$attachment = new Paubox\Mail\Attachment();
$attachment->setFileName("report.pdf");
$attachment->setContentType("application/pdf");
$attachment->setContent(base64_encode(file_get_contents("/path/to/report.pdf")));

$message->setAttachments([$attachment]);

$response = $paubox->sendMessage($message);

echo $response->sourceTrackingId;

$disposition = $paubox->getEmailDisposition($sourceTrackingId);

foreach ($disposition->data->message->message_deliveries as $delivery) {
    echo $delivery->recipient . " → " . $delivery->status->deliveryStatus . PHP_EOL;
}

$response = $paubox->scheduleMessage($message, '2025-12-25T15:00:00Z');
echo $response->sourceTrackingId;
echo $response->scheduledAt;

$status = $paubox->getScheduledMessage($sourceTrackingId);
echo $status->state;          // "pending", "sent", "cancelled"
echo $status->scheduledAt;

$response = $paubox->rescheduleMessage($sourceTrackingId, '2025-12-26T10:00:00Z');
echo $response->scheduledAt;

$response = $paubox->cancelScheduledMessage($sourceTrackingId);
echo $response->state;        // "cancelled"

try {
    $response = $paubox->sendMessage($message);
    echo "Sent. Tracking ID: " . $response->sourceTrackingId . PHP_EOL;
} catch (\Exception $e) {
    echo "Error: " . $e->getMessage() . PHP_EOL;
}