The Email Addresses dialog box is for specifying the list of addresses to
send email to regarding job status. 

Specify the list of addresses by typing the email address in the email input
entry, and then clicking the "add" button.   Watch as your input gets loaded
into the "Email Addresses" listbox. Entries of the latter can be deleted by
selecting an entry, and then clicking the accompanying "delete" button. If you
want to modify an entry in the listbox, then select the entry, which would
result in its values to be loaded into the "email" input entry, then
change the value of the input entry, and finally click the accompanying
"update" button.  

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Command Buttons
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Click on "ok" button after you are satisfied with the list of addresses.
This is also the default action (as indicated by the sunken look of the button)
when the <Return> key is pressed.

Click on "reset to default" if you want to reset the box of entries to its
default values.