PC DB: Description of an .ATT File

• Microsoft Mail for PC Networks, versions 2.1e, 3.0, and 3.2

SUMMARY

An .ATT file is the method by which the Microsoft Mail system stores attachment files. The .ATT files are accessed by using pointers previously stored in an .MAI file. An attachment file can be any valid MS-DOS file of any size.

A single .MAI file can reference several attachments; however, a single attachment file cannot be referenced more than once. Attachment files are fully encrypted.

MORE INFORMATION

Below is a brief description of the mail message fields.

A mail file is composed of fields. Each field is composed of a field type, field length, and data. Fields can be either as specified in FIPS PUB 98 or vendor-defined fields. A vendor-defined field is a field that can be defined for your own purposes. The Mail system uses several vendor-defined fields.

The following table specifies the fields that a mail message is composed of and the order that these fields generally appear in a mail message.

   Field Name        Field Type
   ---------------------------------
   Message format    Vendor-defined
   From              Vendor-defined
   To                Standard
   Cc                Standard
   Date              Standard
   Priority          Standard
   Subject           Standard
   Attachments       Vendor-defined
   Text              Standard