Thomas, thanks for the info. It worked for me.
And I just used the brute force approach: Went into Library/Containers and deleted the com.apple.Preview
1) Quit Preview, and
2) open terminal
3) run the following commands
rm -rf com.apple.Preview
that's it. worked like a charm for me. thanks to Thomas
I'm using Yosemite (Preview version 8.0) and I couldn't figure out how to send a PDF via email. Thanks to bjena, I discovered that the trick is to use the share button. (I control-clicked on the toolbar, and then chose the option to show icon and text, instead of just icon, and then I noticed that the share button was already on my toolbar. Clicking on share brings up the "Email" option.)