Data type: PtypInteger32 ([MS-OXCDATA] section 2.11.1)

The PidTagSendInternetEncoding property ([MS-OXPROPS] section 2.1008) contains a bitmask of message-encoding preferences for mail sent to an e-mail-enabled entity that is represented by an Address Book object. When sending mail by using the [RFC2822] Internet message format and Multipurpose Internet Mail Extensions (MIME) to the E-mail Object Conversion Protocol, as specified in [MS-OXCMAIL], the PidTagSendInternetEncoding property specifies the format of the MIME body, as specified in [MS-OXCMAIL].