Pics I uploaded to Zillow thru Postlets are sideways

[John Thaxton]

I used Postlets to upload pics of my rental to Zillow and most of them are tilted 90 degrees. They look fine on the Postlets link and when I sent the same ones to Craigslist. I used my iPad to take the pics and I believe the problem is with all the pics that were taken in portrait, while the landscape ones were ok.

Is there a way to fix this without taking news pics?

Here's the Zillow link of my house.

And the