Changed autodetect messages from WARN to INFO in non forced mode.

Till Brehm

2016-04-05 32dcc8752f280299f0e364ccebcc092db8f2cb4e

 server/plugins-available/mail_plugin.inc.php

@@ -247,7 +247,7 @@
         $mailHeaders     .= "Content-Type: text/html; charset=utf-8" . "\n";
         $mailHeaders     .= "Content-Transfer-Encoding: quoted-printable" . "\n";
      } else {
         $mailHeaders     .= "Content-type: text/plain; charset=utf-8" . "\n";
         $mailHeaders     .= "Content-Type: text/plain; charset=utf-8" . "\n";
         $mailHeaders     .= "Content-Transfer-Encoding: 8bit" . "\n";
      }
      $mailHeaders     .= "From: $welcome_mail_from" . "\n";