I'm trying to display a logo in .svg format in an html email (hence why my styling is inline below). The direct link to the logo works: http://www.wehi.edu.au/uploads/e-mail/WEHI_logo.svg and setting my img src to the local file on my computer also previews correctly in the browser, but when I set img src to the uploaded file, the browser preview shows a grey box! What have I done wrong? (Code below)

Code:
<img src="http://www.wehi.edu.au/uploads/e-mail/WEHI_logo.svg" alt="Walter and Eliza Hall Institute logo" title="institute logo" style="max-width:180px; max-height: 39px; padding-right:10px;">