MAPI Property Tag List

mapitags.txt is a list of MAPI property tags that Microsoft products exercise or reference. For some of the tags, semantics are documented in MS-OXPROPS (or related documents; MS-OXPROTLP). For some of the tags, only the mnemonic name is known because some program referenced the number. And for some of the tags, only the number is known, but where the semantics have been decoded without outside assistance.

namedproptags.txt is a (likely very incomplete) list for Named Properties' LID/Names and types.

Property tags which are specific to vendors other than Microsoft are in separate .txt files.

Mnemonic names in the text file can have different forms:

• PR_xxx are names exposed by the SDKs for the C programming language. The "Inside MAPI" book (1996) also uses the C name.
• PidTagXXX is used in documentation and referred to as the "canonical name".
• ptagXXX shows up in documentation, the reason for this duplication is unclear. I suspect style wars in Microsoft source codes.
• .XXX are names exposed by C# programming language interfaces.
• EDB.XXTable.XXColumn are names exposed by Exchange Server database files.
• When a property tag has a PR-style name or a PidTag-style canonical name already, I have omitted listing the ptag-style variation.

Definitions

• property tag: 32-bit unsigned integer, composed of:
  • bits 31..16: 16-bit property ID
  • bits 15..0: 16-bit property type
    • bit 13: instance flag
    • bit 12: multivalue flag
    • bits 11..0: (no specific name)

MAPI property types and OLE types [MS-OAUT] share some values.

General grouping

Reserved:                          0x0000
Tagged props:                      0x0001..0x7FFF
 ┣━ MAPI-defined props:            0x0001..0x3FFF
 ┃   ┣━ Envelope props:            0x0001..0x0BFF
 ┃   ┣━ Recipient props:           0x0C00..0x0DFF
 ┃   ┣━ Non-transmittable props:   0x0E00..0x0FFF (non-transmittable)
 ┃   ┣━ Message content props:     0x1000..0x2FFF
 ┃   ┗━ Others:                    0x3000..0x3FFF
 ┃       ┣━ Common props:          0x3000..0x32FF
 ┃       ┣━ Form props:            0x3300..0x33FF
 ┃       ┣━ Message store:         0x3400..0x35FF
 ┃       ┣━ Container (folder/AB): 0x3600..0x36FF
 ┃       ┣━ Attachment:            0x3700..0x38FF
 ┃       ┣━ Address book:          0x3900..0x39FF
 ┃       ┣━ Mail user:             0x3A00..0x3BFF
 ┃       ┣━ Distribution list:     0x3C00..0x3CFF
 ┃       ┣━ Profsect:              0x3D00..0x3DFF
 ┃       ┣━ Status object:         0x3E00..0x3EFF
 ┃       ┗━ Display table:         0x3F00..0x3FFF
 ┣━ Transport-specific props:      0x4000..0x5FFF
 ┃   ┣━ Envelope props:            0x4000..0x57FF
 ┃   ┗━ Recipient props:           0x5800..0x5FFF
 ┣━ Client-specific props:         0x6000..0x65FF (non-transmittable)
 ┣━ Provider-specific props:       0x6600..0x67FF (non-transmittable)
 ┃   ┗━ Secure profile props:      0x67F0..0x67FF
 ┗━ Message class-specific props:  0x6800..0x7FFF
     ┣━ Content props:             0x6800..0x7BFF
     ┗━ Non-transmittable:         0x7C00..0x7FFF (non-transmittable)
Mapping range for named props:     0x8000..0xFFFE
Reserved:                          0xFFFF

There are some more reserved ranges, but we need not bother with it. NSPI does not have named properties, so 0x8000..0xFFFE are just more properties there. Conversely, the properties 0x8000..0xFFFE all belong to the addressbook provider.