So you want a hyperlink field, but need the email address without the "mailto:" in front? Best way I can think of is to have two fields for the email address, one hyperlink and one text only and print out the text fields using a query or report, but use the hyperlink field for the mail shortcut…maybe in a form. Once you’ve created the hyperlink field, you can create an update query to copy data from the mail field and add the mailto: in front.
From what I can tell, any other way would require some VB coding in a form to format the text email field to display as a hyperlink with "mailto:" in front.