Codeigniter achor producing dodgy link in email inbox.. what could the problem be?

My application is emailing out fine but the email I receive displays incorrectly. Rather than have text and a simple "click here to activate" link it doesn't. it shows this instead:

开发者_如何学C

Hi user1, please click the following link to activate your account <a
href="http://mysite.com/activation/fzyZuyxVAzZS2koVg5UFjfVjlcLNcrzp">ssss</a>

Here is the code from my model that sends email to user when they request activation email.

   $this->load->library('email');
    $this->email->from('myemaill@gmail.com', 'my site');
    $this->email->to($result[0]->email);
    $this->email->subject('my site - Activate your account');
    $this->email->message('Hi ' . $result[0]->first_name . ', please click the following link to activate your account ' . anchor('http://mysite.com/activation/' . $new_activation_code, 'click here to activate'));
    $this->email->send();

Also the mail always ends up in my spam folder.

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The email format is plain text at the moment, you need to convert it to HTML via this option of the email library:

$config['mailtype'] = 'html';
$this->email->initialize($config);

See Docs for more info