title: Accented letters not rendering at some clients in html email
body: <p>We are sending out newsletters. The format used is html as far as i know, but on some clients accented letters don't render just there code  can be seen. For example: "<strong>&amp;nbsp</strong>" or "<strong>&amp;eacute</strong>" etc.
  Unfortunately i don't know more details yet, because my friend asked me to help him with this. What would be the proper email header for these kind of emails? I suspect the problem lies there.
  Thanks for helping.</p>
  
  <p><strong>update:</strong>
  I got more information now. The thing is that they are using a service provided by a third party. It's web based using TinyMCE for editing mails(unfortunately i doubt that i can get access to settings). Anyway they managed to send me a header of the mail:</p>
  
  <p>Content-Transfer-Encoding: quoted-printable
  Content-Type: text/plain; charset=ISO-8859-1</p>
  
  <p>Shouldn't be "text/html" instead of "text/plain"? Because if it's plain then it's obvious that it's not rendering, right? Or is it possible that the email header sent is "text/html" but the mail software on the client can't handle html mails and changes it to "text/plain" ? Thanks for your help, Alex</p>