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Important This document may not represent best practices for current development, links to downloads and other resources may no longer be valid. Current recommended version can be found here.

PidTagAttachMimeTag Canonical Property

This content is outdated and is no longer being maintained. It is provided as a courtesy for individuals who are still using these technologies. This page may contain URLs that were valid when originally published, but now link to sites or pages that no longer exist.

Contains formatting information about a Multipurpose Internet Mail Extensions (MIME) attachment.

Associated properties:




Data type:



Message attachment

If the PR_ATTACH_TAG (PidTagAttachTag) property contains the value OID_MIMETAG, the transport provider should look at these properties to determine how the attachment is formatted.

These properties are copied from the Content-type parameter of the inbound MIME header. The composition of the string is defined in the RFC 1521 document. The format is type/subtype, such as application/binary or text/plain.

Protocol Specifications


Handles message and attachment objects.


Specifies the properties of rights-managed encoded messages.

Header Files


Provides data type definitions.


Contains definitions of properties listed as alternate names.

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