email

I am having problems with sending emails.  Is there a way to make it so that it always uses my default email?  If not, I am also having problems with sending emails.  for some reason it locks up frequently with the blue circle.  i have to close it out and restart the app to make it work.  Sometimes it takes more than once.  I have tried saving the PDF to my desktop and send from there but that had the same issues. Is anyone else having the same problems?