Permanent Entry ID: A property of an Address Book object that can be used to uniquely identify the object.
permission: A rule that is associated with an object to regulate which users can gain access to the object and in what manner. See also rights.
Personal Information Manager (PIM): A category of software packages for managing commonly used types of personal information, including contacts, email messages, calendar appointments, and meetings.
phishing: The luring of sensitive information, such as passwords or other personal information, from a recipient by masquerading as someone who is trustworthy and has a real need for such information.
phishing message: An email message that is designed to trick a recipient into divulging sensitive information, such as passwords or other personal information, to a non-trustworthy source.
plain text: Text that does not have markup. See also plain text message body.
plain text message body: A message body (2) for which the Content-Type value of the Email Text Body header field is "text/plain". A plain text message body can be identified explicitly in the content, or implicitly if it is in a message that is as described in [RFC822] or a message that does not contain a Content-Type header field.
point: A unit of measurement for fonts and spacing. A point is equal to 1/72 of an inch.
policy tip: A message that is displayed in the client user interface to inform the user that an email does not comply with an email policy configured on the server.
port: A TCP/IP numbered connection point that is used to transfer data.
Portable Network Graphics (PNG): A bitmap graphics file format that uses lossless data compression and supports variable transparency of images (alpha channels) and control of image brightness on different computers (gamma correction). PNG-format files have a .png file name extension.
Post object: A Message object that represents an entry in a discussion thread stored in a messaging store.
Post Office Protocol - Version 3 (POP3): A protocol that is used for accessing email from mail servers, as described in [RFC1939].
Predecessor Change List (PCL): A set of change numbers that specify the latest versions of a messaging object in all replicas that were integrated into the current version. It is used for conflict detection.
presence: (1) A status indicator on a client device that is transmitted by using the Wide Area Network Device Presence Protocol (WAN DPP).
(2) A setting for the User field that determines whether instant-messaging status information appears with user names in that field.
presentity: An entity that provides presence information to a presence service.
primary recipient: A person for whom a message is directly intended.
property ID: A 16-bit numeric identifier of a specific attribute (1). A property ID does not include any property type information.
property list restriction table: A set of restrictions, expressed in tabular form, that is imposed on an array of properties and the values of those properties.
property name: A string that, in combination with a property set, identifies a named property.
property tag: A 32-bit value that contains a property type and a property ID. The low-order 16 bits represent the property type. The high-order 16 bits represent the property ID.
property type: A 16-bit quantity that specifies the data type of a property value.
public folder: A Folder object that is stored in a location that is publicly available.
publisher: A SIP protocol client that is making a publish request.
publishing license: An XrML 1.2 license that defines the usage policy for protected content and contains the content key with which that content is encrypted. The usage policy identifies all authorized users and the actions that they are authorized to take with the content, in addition to any usage conditions. The publishing license tells a server which usage policies apply to a specific piece of content and grants a server the right to issue Use Licenses (Uls) based on that policy. The publishing license is created when content is protected. Also referred to as "Issuance License (IL)."