Ian Nominate

Thank you PinkElephant.  The solution was so simple - the @ in front of the notebookname.  This was NOT explained in the sales blurb about this facility.

I am very pleased with v10 which I have recently installed.  In particular I am delighted to be able to file emails directly into a Notebook.  However, the options go further by this advice:  "If you have auto-filing enabled, but want to put your notes into a specific location, simply specify a notebook and/or tag in the email subject. Using the notebook or tag names will override auto-filing for that note."

This is exactly what I want to do and with trial and error I have discovered how to do it.  But my real hope is to be able to put the email into a Notebook which is part of a stack.  I can't find a way to do this.  Is there a way to specify the stacked Notebook in the email subject line that will do that?