安装SDK:
https://docs.aws.amazon.com/sdk-for-php/v3/developer-guide/getting-started_installation.html

发送demo代码：
https://docs.aws.amazon.com/ses/latest/DeveloperGuide/examples-send-using-sdk.html

准备好key, sec

use Aws\Ses\SesClient;
use Aws\Exception\AwsException;

$credentials = new Aws\Credentials\Credentials('xx', 'xx');

$SesClient = new SesClient([
    'version' => '2010-12-01',
    'region'  => 'us-east-1',
    'credentials' => $credentials,
]);

$sender_email = '[email protected]';

$recipient_emails = ['[email protected]'];

$subject = 'Amazon SES test (AWS SDK for PHP)';
$plaintext_body = 'This email was sent with Amazon SES using the AWS SDK for PHP.' ;
$html_body =  '<h1>AWS Amazon Simple Email Service Test Email</h1>'.
              '<p>This email was sent with <a href="https://aws.amazon.com/ses/">'.
              'Amazon SES</a> using the <a href="https://aws.amazon.com/sdk-for-php/">'.
              'AWS SDK for PHP</a>.</p>';
$char_set = 'UTF-8';

try {
    $result = $SesClient->sendEmail([
        'Destination' => [
            'ToAddresses' => $recipient_emails,
        ],
        'ReplyToAddresses' => [$sender_email],
        'Source' => $sender_email,
        'Message' => [
          'Body' => [
              'Html' => [
                  'Charset' => $char_set,
                  'Data' => $html_body,
              ],
              'Text' => [
                  'Charset' => $char_set,
                  'Data' => $plaintext_body,
              ],
          ],
          'Subject' => [
              'Charset' => $char_set,
              'Data' => $subject,
          ],
        ],
    ]);
    $messageId = $result['MessageId'];
    echo("Email sent! Message ID: $messageId"."\n");
} catch (AwsException $e) {
    // output error message if fails
    echo $e->getMessage();
    echo("The email was not sent. Error message: ".$e->getAwsErrorMessage()."\n");
    echo "\n";
}

对于使用php比较老的版本，可以用这个第三方实现库。

https://github.com/daniel-zahariev/php-aws-ses