我得到了超时消息，直到我添加了这行：

$this->email->set_newline("\r\n");

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我将主机设置为ssl://email-smtp.us-east-1.amazonaws.com

要让CI与Amazon Simple Email Service（SES）配合使用，您需要做三件事
1.需要设置newline = \r\n，否则将超时。
1.需要将smtp_crypto设置为某个值。（新要求）
1.需要确保“发件人”电子邮件地址在Amazon SES中得到批准。我做了我的“从”电子邮件地址“no-reply@mydomain.com”
此外，您应该为您的“发件人”电子邮件地址设置DKIM，以防止电子邮件被放入垃圾邮件文件夹。这涉及到进入Amazon SES ->身份管理->电子邮件地址-> DKIM，点击启用按钮，并将3个DNS条目添加到您网站的DNS。
不需要做任何特殊的设置SPF。信封域amazonses.com通过SPF。
最后，如果您希望用户能够回复不同于您批准的“发件人”电子邮件地址的电子邮件地址，请确保使用“回复”。
示例工作代码：

$obj = &get_instance();

$config['protocol'] = 'smtp';
$config['smtp_host'] = 'email-smtp.us-west-2.amazonaws.com';
$config['smtp_user'] = 'USER';
$config['smtp_pass'] = 'PASS';
$config['smtp_port'] = '587';
$config['newline'] = "\r\n";
$config['smtp_crypto'] = 'tls';
$obj->email->initialize($config);

$obj->email->set_mailtype('html');
// don't html_escape email header variables
$obj->email->from(MV_FROM_EMAIL, $from_name);
$obj->email->reply_to($from_email, $from_name);
$obj->email->to($to);
$obj->email->subject($subject);
$obj->email->message($obj->load->view($path, html_escape($data), true));
$obj->email->send();

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public function enviar_email($para, $assunto, $mensagem, $formato='html'){
            $this->CI->load->library('email');
            $config['mailtype']     = $formato;
            $config['useragent']    = 'Post Title';
            $config['protocol']     = 'smtp';
            $config['smtp_host']    = 'tls://email-smtp.us-east-1.amazonaws.com';
            $config['smtp_user']    = 'smtpuser';
            $config['smtp_pass']    = 'smtppass';
            $config['smtp_port']    = '465';
            $config['wordwrap']     = TRUE;
            $config['newline']      = "\r\n"; 

            $this->CI->email->initialize($config);

            $this->CI->email->from('Your Verified Sender Email', 'Post Title');
            $this->CI->email->to($para);
            $this->CI->email->subject($assunto);
            $this->CI->email->message($mensagem);

            if($this->CI->email->send()):
                    return TRUE;
            else:
                    $this->CI->email->print_debugger();
            endif;

    }

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我还需要添加一行

$config['smtp_crypto']  = 'tls';

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到我的配置阵列
这是supported by CI 2.1.0 and greater

对我有效的设置看起来像这样：

$test_config['protocol'] = 'smtp';
$test_config['smtp_host'] = 'ssl://email-smtp.us-east-1.amazonaws.com';
$test_config['smtp_port'] = '465';
$test_config['smtp_user'] = 'XXXXXXXXXXXXXXXXXXX';
$test_config['smtp_pass'] = 'YYYYYYYYYYYYYYYYYYYYYYYYYYYYYYY';
$test_config['newline']      = "\r\n"; 

$this->email->initialize($test_config);

$this->email->from('from@test.com', 'From at Test.com');
$this->email->to('To@Test.com');

$this->email->subject('Email Test');
$this->email->message('Testing the email class.');

$this->email->send();

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换行符必须设置为“\r\n”，并且可以在配置文件中设置，如果正确设置为“\r\n”，而不是如上所述的“\r\n”。