2.2.1 Recipient Object Storage
The following MUST be true for Recipient object storages:
The Recipient object storage representing the first Recipient object is named "__recip_version1.0_#00000000". The storage representing the second is named "__recip_version1.0_#00000001" and so on. The digit suffix is in hexadecimal. For example, the storage name for the eleventh Recipient object is "__recip_version1.0_#0000000A".
A .msg file can have a maximum of 2048 Recipient object storages.
There is exactly one property stream, and it contains entries for all properties of the Recipient object.
There is exactly one stream for each variable length property of the Recipient object, as specified in section 2.1.3.