Sharing via email

Hi,

I've been using Calibre for a long time and normally when I use calibre to email my books its shows on my kindle/on the amazon content section with the title and the author. Since yesterday it's now showing the title and then my email address as the author. I haven't changed any settings so I'm not sure why it's changed. Does anyone have any ideas?

I'm sending in .mobi format.

Thanks
Emma