composer require jetemail/jetemail-php

use JetEmail\JetEmail;
use JetEmail\SendEmailOptions;

$client = new JetEmail('your-transactional-api-key');

$result = $client->email->send(new SendEmailOptions(
    from: 'Your App <hello@yourdomain.com>',
    to: 'user@example.com',
    subject: 'Welcome!',
    html: '<h1>Welcome!</h1>',
));

// API key string
$client = new JetEmail('your-transactional-api-key');

// Or with options
$client = new JetEmail(
    apiKey: 'your-transactional-api-key',
    baseUrl: 'https://api.jetemail.com', // optional
);

$result = $client->batch->send([
    new SendEmailOptions(
        from: 'you@example.com',
        to: 'alice@example.com',
        subject: 'Hello Alice',
        html: '<p>Hi Alice!</p>',
    ),
    new SendEmailOptions(
        from: 'you@example.com',
        to: 'bob@example.com',
        subject: 'Hello Bob',
        html: '<p>Hi Bob!</p>',
    ),
]);

use JetEmail\Attachment;

$result = $client->email->send(new SendEmailOptions(
    from: 'you@example.com',
    to: 'recipient@example.com',
    subject: 'Invoice',
    html: '<p>Please find your invoice attached.</p>',
    attachments: [
        Attachment::fromPath('/path/to/invoice.pdf'),
        Attachment::fromContent('Hello World', 'hello.txt'),
    ],
));

use JetEmail\JetEmailException;

try {
    $client->email->send(new SendEmailOptions(...));
} catch (JetEmailException $e) {
    echo $e->getMessage();
    echo $e->statusCode;
    echo $e->response;
}