#1. $headers .= "Content-Type: text/plain";
#2. $headers .= "Content-Type: text/html; charset=iso-8859-1\r\n";
It is working. The problem was in the header. I change the header #2 to $header #1.
Also, it seems to be working without \r\n. Just using spaces in the text.
Should I use spaces or \n\r?
TH