我使用的是笨电子邮件库使用我们的Exchange服务器发送电子邮件。 我得到的问题是，电子邮件的内容被搞砸。
有迹象表明，得到与等号替换了一些单词“=”，我试过2个不同的Exchange服务器（它们是在不同的位置，并没有关系什么那么）我仍然得到同样的问题。 如果我使用任何其他服务器作为一个SMTP服务器来发送邮件一切工作正常和内容保持不变，并维持不变。
发送前内容：
Dear Customer
Please find attached a comprehensive explanation of how to get our brochure of Angola. This has been sent to you at the request of Alex.
The information has been taken from www.example.co.uk "Company name" is one of the leading tile and marble companies in the UK.
通过Microsoft Exchange发送之后的内容：
Dear Customer
Please find attached a comprehensive explanation of how to get our brochure of A=gola. This has been sent to you at the request of Alex.
The information has been taken from www.example.co.uk "Company name" is one of the leadi=g tile and marble companies in the UK.
正如你可以看到由于某种原因一些的“n”个字符用等号替换“=”（例如：安哥拉> A =戈拉）
我的电子邮件地址配置：
$this->load->library('email');
$config['charset'] = 'utf-8';
$config['mailtype'] = 'html';
// SMTP
$config['protocol'] = 'smtp';
$config['smtp_host'] = 'exchange.example.com'; //ssl://
$config['smtp_user'] = 'email@example.com';
$config['smtp_pass'] = 'password';
$config['smtp_port'] = 25;
$this->email->set_newline( "\r\n" );
$this->email->initialize( $config );
$this->email->clear();
......
$this->email->from( $frome, $fromn );
$this->email->to( $email );
$this->email->subject( $subject );
$this->email->message( $send_message );
$this->email->send();
有谁知道为什么是Microsoft Exchange表现这种方式？ 或者是有某种设置我应该使用的？
