Image tag shows as blank box when no image is uploaded

Sometimes, we send emails with no images, just text in the body. Is there a way to do this without having the image tag show up as a blank box and a grey outline? It seems this is not a app specific thing, as it also occurs when viewing the email online. I'd ideally like to do this without re-coding the template.

200,000 companies around the world can't be wrong.

From Australia to Zimbabwe, and everywhere in between, companies count on 
Campaign Monitor for email campaigns that drive real business results.

Get started for free