[thelist] Sending HTML email in PHP

[Atul]

Hey Folks,

I am sending HTML email in php using the mail() function. My headers are as 
follows:

         $headers .= "From: ".$from_name."<".$from_email.">\r\n";
         $headers .= "To: ".$to_name."<".$to_email.">\r\n";
         $headers .= "MIME-Version: 1.0\r\n";
         $headers .= "Content-type: text/html; charset=iso-8859-1\r\n";
         $headers .= "X-Priority: 1\n";

Now, the message body is a piece of HTML code that consists mostly of 
tables for formatting purposes.
This piece of code when viewed through the browser is fine. It comes out as 
expected. But when, the
email is opened in any mail client, the format is all funked up. The 
characters are out of place, table
cells are missing. And this is an anomaly that sometimes shows up on some 
emails. Other times, its is
fine.

Am I missing anything in the headers? Are the ones that I am using above 
correct? Do I need to do
anything else to preserve the formatting?

Thank you
Atul