|There isn't a native option but you can download the "MarkAsRead" script from the
registered users area, it will do this for you.
The only way to get this to run against junk mail would be to use the "onAdd" event for the "Junk
Mail" mailbox. For information on Poco's event handling see the article on event
For Poco 2.6x, the lines you should add to the "junk mail.dat" are:
Note, this assumes you do not already have event enabled for your "junk mail" mailbox. If you do then simply
add the second line. If you already have an "OnAdd_Scripts" entry as well then add the MarkAsRead script to
the list (with a comma between the last script in the list and the MarkAsRead entry).
This technique will have the added effect of suppressing the dialog box alert (if configured in the Accounts form), sound alert (if configured) and mailbox highlighting.