Incoming ticket requests - convert to plain text

Hello,

We're running 11.2.0 of the WHD. The organization just implemented a standard signature which contains images. Now, every time a ticket is opened, replied to, updated, etc. the images are shown as attachments. My thought was to have the email come in as plain text which would remove the images from the signature. Is that something that can be handled by WHD or is that strictly Exchange side? I looked in WHD but didn't see an option that seemed appropriate.

Thanks very much,

Matt