Can you provide a bit more information. What information regarding the Task are you trying to share via email? Remember the Work plan can be shared via read-only widget (with non Clarizen user). If you want to share the columns/values of a task or the Property card, you can export to excel or pdf.
Feel free to provide a screen capture to better explain what you are trying to copy/paste out of Clarizen and how you are attempting to do so.