codeigniter email weirdness - php

Question

I am trying to send email via codeigniter framework via 2 different ways and on one of them my email goes to junk folder but its really weird...
so my first try was to create a Controller and put inside the index function the following code:
$this->load->library('email');
$this->email->from('no-reply#domain.example.com', 'Your Name');
$this->email->to('email#example.com');
$this->email->subject('Email Test');
$this->email->message('Testing the email class.');
$this->email->send();
echo $this->email->print_debugger();
this way the email arrives fine and not as spam...
when i create a model so i can use it later on for other features to send emails i replace the above code with the following one:
$this->load->library('email');
$this->load->model("email_model");
$this->email_model->sendEmail(null, 'email#gmail.com', 'title', 'message');
and email_model Model contains the following code :
<?php
class email_model extends CI_Model {
function __construct()
{
// Call the Model constructor
parent::__construct();
}
public function sendEmail($from = null, $to = null, $subject = null, $message = null){
$this->email->from('no-reply#domain.com', 'from user');
$this->email->to($to);
$this->email->subject($subject);
$this->email->message($message);
$this->email->send();
}
}
why does that happen?

Answer 1

check your spf records and RDNS records
SPF
here is an article # mediatemple kb: http://kb.mediatemple.net/questions/658/How+can+I+create+an+SPF+record+for+my+domain%3F#gs
RDNS
here is an article on RDNS:
http://www.crucialp.com/resources/tutorials/web-hosting/how-reverse-dns-works-rdns.php

Answer 2

seems content was the reason on the 2nd try... adding more text solved the issue...