Mail to Inbox?

[dollars5]

Hello All,

I am using PHP mail for sending out registration e-mails - but for some reason it is always delivered to spam/bluk mail box.


here is the code:

echo "Welcome $username<br />";
			echo "Check your e-mail for activating your account.<br />";
			//$from = 'From: ' . $main_smarty->get_config_vars("PLIGG_PassEmail_From") . "\r\n";
			$subject= 'Welcome to ' . $main_smarty->get_config_vars("PLIGG_Visual_Name");
			$message = "Hello " . $username . ",\r\n\r\nThanks for registering with us. Please confirm your activation by clicking the following link or by copy, pasting it into your url address field of your browser.\r\n" . my_base_url . my_pligg_base . "/validation.php?code=$encode&uid=$username\r\n\r\nRegards,\r\nAdministrator";
			$headers = "From: " . $main_smarty->get_config_vars("PLIGG_PassEmail_From")  . "\r\nReply-To: " . $main_smarty->get_config_vars("PLIGG_PassEmail_From") . "\r\nCC: account@ccdomaincom\r\nX-Priority: 1\r\n";
			$to=$email;
			mail($to, $subject, $message, $headers);

Any idea how to get it delivered properly to inbox?