FuelPHP + Amazon SES マルチバイト対応 http://kkurahar.github.io/blog/2013/09/11/fuelphp-aws-ses/

client.php

<?php

// Include the SDK using the Composer autoloader
require_once(APPPATH . "vendor/aws-2.0/autoload.php");
// Include the Mail_MIME
require_once("Mail/mime.php");

use Aws\Common\Aws;
use Aws\Common\Enum\Region;
use Aws\Ses\Exception\SesException;
use Aws\Ses\Exception\MessageRejectedException;

class Aws_Ses_Client
{
    protected $config = [];
    protected $ses = null;
    protected $mail_mime = null;
    protected $to = [];
    protected $cc = [];
    protected $bcc = [];
    protected $subject = '';
    protected $body_text = '';
    protected $body_html = '';
    protected $attachments = [];

    /**
     * Driver constructor
     *
     * @param   array   $config     driver config
     */
    public function __construct(array $config)
    {
        $this->config = $config;
        $this->ses = Aws::factory(array(
            'key' => \Config::get('access_key'),
            'secret' => \Config::get('secret_key'),
            'region' => Region::US_EAST_1
        ))->get('ses');

        $this->mail_mime = new Mail_mime($this->config['crlf']);
    }

    public function from($email, $name = false)
    {
        $this->config['from']['email'] = (string) $email;
        return $this;
    }

    public function to($to)
    {
        $this->to = $to;
        return $this;
    }

    public function cc($cc)
    {
        $this->cc = $cc;
        return $this;
    }

    public function bcc($bcc)
    {
        $this->bcc = $bcc;
        return $this;
    }

    public function subject($subject)
    {
        $this->subject = (string) $subject;

        return $this;
    }

    public function body_text($body)
    {
        $this->body_text = (string) $body;

        return $this;
    }

    public function body_html($body)
    {
        $this->body_html = (string) $body;

        return $this;
    }

    public function attachment($attach = [])
    {
        $this->attachments = $attach;
        return $this;
    }

    public function send()
    {
        if (empty($this->to) and empty($this->cc) and empty($this->bcc)) {
            throw new \FuelException('Cannot send email without recipients.');
        }

        if (($from = $this->config['from']['email']) === false or empty($from)) {
            throw new \FuelException('Cannot send without from address.');
        }

        $to          = $this->to;
        $cc          = $this->cc;
        $bcc         = $this->bcc;
        $subject     = $this->subject;
        $body_text   = $this->body_text;
        $body_html   = $this->body_html;
        $attachments = $this->attachments;

        if($attachments) {
            /* UTF-8 -> ISO-2022-JP */

            // 内部エンコーディングを取得
            $internalChar = mb_internal_encoding();
            // mimeメッセージを作成
            $subject = $this->encode_mimeheader($subject, $internalChar);
            mb_convert_variables($this->config['charset'], $internalChar, $body_text);
            mb_convert_variables($this->config['charset'], $internalChar, $body_html);
            if ($body_text) $this->mail_mime->setTxtBody($body_text);
            if ($body_html) $this->mail_mime->setHTMLBody($body_html);
            // 添付ファイルを設定
            $this->add_addAttachment($attachments, $internalChar);
            // mimeフォーマットのヘッダーとボディを作成
            $param['head_charset'] = $this->config['charset'];
            $param['text_encoding'] = $this->config['encoding'];
            $param['text_charset'] = $this->config['charset'];
            $param['html_encoding'] = $this->config['charset'];
            $param['html_charset'] = $this->config['charset'];
            $mime_body = $this->mail_mime->get($param);
            $mime_headers = $this->mail_mime->txtHeaders([
                'From' => $from,
                'To' => $to,
                'Cc' => $cc,
                'Bcc' => $bcc,
                'Subject' => $subject
            ]);

            // mimeメッセージを作成
            $mime_message = $mime_headers . "\r\n" . $mime_body;
            $result = $this->ses->sendRawEmail([
                'RawMessage' => [
                    'Data' => base64_encode($mime_message)
                ]
            ]);

        } else {
            $arrBody = [];
            if ($body_text) $arrBody += ['Text' => ['Data' => $body_text,'Charset' => $this->config['charset']]];
            if ($body_html) $arrBody += ['Html' => ['Data' => $body_html,'Charset' => $this->config['charset']]];

            $result = $this->ses->sendEmail([
                'Source' => $from,
                'Destination' => [
                    'ToAddresses' => $to,
                    'CcAddresses' => $cc,
                    'BccAddresses' => $bcc
                ],
                'Message' => [
                    'Subject' => ['Data' => $subject,'Charset' => $this->config['charset']],
                    'Body' => $arrBody
                ]
            ]);
        }
    }

    protected function encode_mimeheader($header, $char)
    {
        $header = mb_convert_encoding($header, $this->config['charset'], $char);
        $transfer_encoding = ($this->config['encoding'] === 'quoted-printable') ? 'Q' : 'B' ;
        return mb_encode_mimeheader($header, $this->config['charset'], $transfer_encoding, $this->config['newline']);
    }

    protected function add_addAttachment($attachments, $char)
    {
        foreach ($attachments as $file => $c_type) {

            $f_name = basename($file);
            mb_convert_variables($this->config['charset'], $char, $f_name);
            $this->mail_mime->addAttachment(
                $file, 
                $c_type,
                $f_name,
                true, // isfile
                'base64',// encoding
                'attachment', // disposition attachment
                $this->config['charset'], // charset
                '', // language
                '', // location
                'base64', // n_encoding
                $this->config['charset'], // f_encoding Encoding of the attachment's filename in Content-Disposition header.
                '', // description
                $this->config['charset'] // h_charset
            );
        }
    }
}

myconfig.php

<?php
return array(
    // Amazon Web Services Key. Found in the AWS Security Credentials. You can also pass
    // this value as the first parameter to a service constructor.
    'access_key' => 'your access key',

    // Amazon Web Services Secret Key. Found in the AWS Security Credentials. You can also
    // pass this value as the second parameter to a service constructor.
    'secret_key' => 'your secret key',
    //----------------------------------------------------------------------
    // S3関連
    //----------------------------------------------------------------------
    's3' => array(
    ),
    //----------------------------------------------------------------------
    // AutoScaling関連
    //----------------------------------------------------------------------
    'as' => array(
    ),
    //----------------------------------------------------------------------
    // SES関連
    //----------------------------------------------------------------------
    'ses' => array(
        'charset' => 'ISO-2022-JP',

        'encode_headers' => false,

        'encoding' => '7bit',

        'newline' => "\n",

        'crlf' => "\n",

        'from' => array(
            'email' => false,
            'name'  => false,
        ),
   ),
);

ses.php

<?php

class Aws_Ses
{
    /**
     * Driver config defaults.
     */
    protected static $_ses;

    public static function forge()
    {
        $driver = new Aws_Ses_Client(static::$_ses);
        return $driver;
    }

    /**
     * Init, config loading.
     */
    public static function _init()
    {
        static::$_ses = \Config::get('ses');
    }
}