Ups, forgot to tell that org.jboss.seam.mail.ui.context.MailResponseWriter write method uses the delegate (which happens to be org.apache.myfaces.shared_impl.renderkit.html.HtmlResponseWriterImpl ) for both plain and html outputs. | @Override | public void write(String str) throws IOException | { | if (TEXT_PLAIN_CONTENT_TYPE.equals(getContentType())) | { | delegate.write(str); | } | else | { | delegate.write(str); | } | } | View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4090074#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...