You get to this window by going to the Services -> Finger page in the VPOP3 settings.

The Finger Results Template box lets you define how the results of a Finger query to the VPOP3 Finger server will appear. See below for information on the format of this text
The Access Restrictions are used to limit who can use the VPOP3 Finger server. You can restrict access to specific ranges of IP addresses. The format of the restriction definitions is described here.
The Finger Results Template defines how a Finger query result will be shown.
You can put any text in this box, and it will appear as it is displayed, except for special tags, which are enclosed in angle brackets (<...>)
If the first character after the opening < is a minus sign (-) then this tag will only be displayed for Verbose finger requests, otherwise it will be shown for all finger requests.
The following tags are currently recognised by VPOP3:
id - The user account name in VPOP3
messagecount - The number of messages waiting for this user in VPOP3
nomessages-xxxx - If there are no messages waiting for this user, then the text in the place of xxxx will be displayed (eg <nomessages-no messages>)
plan - The user's 'Plan' file is returned
info - The user's 'Finger Information' file is returned
Any other tags are interpreted as the LDAP attribute of that name for this user. Some of the more common of these used are:
mail Email Address
cn - Display Name
title - Title
givenname - First Name
sn - Last Name
department - Department
co - Company
telephonenumber - Office Phone Number
officefax - Office Fax Number
mobile - Mobile Phone Number
When defining the Finger results template be aware that unless you set access restrictions, this information will be available to anyone with network access to the VPOP3 computer.