Groupwise 2014 SP1 running on SLES 11, clients on Windows 7

We are having an issue with signatures, logo images and autoreply rules. We recently set everyone in the office up with a standard signature format, which includes our company logo.

When anyone sends an email the signature properly shows the image of our logo in the sent email and the recipient is able to see it. However, when anyone uses a Autoreply or Vacation rule, the image gets stripped out and the layout of the signature changes. Only the text in the signature is sent, as though the email was sent in plain text and not HTML.

I also tried setting up a global signature with our logo image in it. Again the same thing happens. Only the text in the global signature is added when an autoreply rule is triggered.

Is there a way to get this working correctly?