Exchange服务器 - 使用邮件类型的html发送电子邮件 - 损坏的链接

I am using CodeIgniter library to send emails from my windows exchange server. But When I tried to send html type email, and this email includes links, then the received email is corrupted!

sent email:

http://domain.x.io/researchapp/admin/reviewerspage1?email=abcdefg@gmail.com&phase=1&id=40

recieved email:

http://domain.x.io/researchapp/admin/reviewerspage1?email=abcdefg@gmail=.com&phase=1&id=40

//Code:

    $this->load->library('email');
    $this->email->clear();
    $this->email->initialize(array(
        'protocol' => 'smtp',
                        'smtp_host' => 'srv.domain.x.io',
                        'mailtype' => 'html',
                        'smtp_port' => 25,
                        'crlf' => "
",
                        'newline' => "
"
                        ));
    $this->email->to('xx@gmail.com');
    $this->email->from('no-reply@domain.x.io', 'subject');
    $this->email->subject('subject' );
    $this->email->message('http://domain.x.io/researchapp/admin/reviewerspage1?email=abcdefg@gmail.com&phase=1&id=40'  );
    $this->email->send();
    echo $this->email->print_debugger();

Although I used the gmail server and it worked fine to send links successfully.