TRANSFER Programming Manual

How to Send and Receive X400 Messages
X400 Services
069138, Update 1 to 040970 Tandem Computers Incorporated 6–7
To route a message to its destination in an X.400 network, X.400 uses O/R name
attributes hierarchically. The message goes to the country and the ADMD, and then to
the PRMD, if a PRMD is specified. The destination domain uses personal-name and
other attributes to deliver the message to the appropriate recipient.
Specific O/R name attributes are listed in “TRANSFER and O/R Names,” later in this
section.
How to Send and
Receive X400
Messages
The steps for sending and receiving X400 messages are very similar to the steps for
sending and receiving TRANSFER messages. The following comparison between
TRANSFER messages and X400 messages provides background information for
sending and receiving messages.
The construction of TRANSFER messages and X400 messages is similar in the
following ways:
Your interface to X400 messages is the same as the standard TRANSFER interface:
UOWs, packages, items, and item records.
Several features are similar and are specified in the same manner:
X.400 and the TRANSFER delivery system allow messages to have multiple
destinations.
TRANSFER priority is similar to X.400 grade of delivery.
X.400 and the TRANSFER delivery system allow specification of primary and
copy recipients for mail messages.
X.400 and the TRANSFER delivery system provide storage for subject text for
mail messages.
X.400 and the TRANSFER delivery system allow expiration dates for mail
messages.
The construction of TRANSFER messages and X400 messages is different in the
following ways:
X.400 originator and recipient names are more complex than TRANSFER
correspondent names.
The TRANSFER delivery system supports several X.400-specific UOWs.
The TRANSFER delivery system supports several X.400 service elements that
augment the set of TRANSFER features and can be used with TRANSFER
recipients as well as X400 recipients.
The TRANSFER delivery system supports several X400-specific status packages.
In addition, the underlying structure of X.400 messages is quite different from the
TRANSFER message structure. The underlying structure is, however, not noticeable
unless you need to provide specific information for a recipient UA. Mapping is
described in "Additional Data Mapping Information" at the end of this section.