Presentation wise its not a very good look but there is an easy solution.
Align RSS Images is a simple plugin that scans your RSS feed and ensures that every image has the correct alignment and margin settings.
There's no settings for this plugin. Simple upload and activate.
If you have a caching plugin installed, you may need to wait for the next garbage collection before you see the changes in your rss feed reader.
That's all for this post.
I tested this plugin and it works fine on my feed.