An error occurred while transferring message {message id}, because per-receipt information could not be downgraded. An X.400 API Association (XAPIA) {error code} reason code and {error code} diagnostic code were returned. [{value}{value}{value}{value}] (14)

Details
Product:	Exchange
Event ID:	175
Source:	MSExchangeMTA
Version:	6.0
Component:	Message Transfer Agent
Symbolic Name:	MTA00175
Message:	An error occurred while transferring message {message id}, because per-receipt information could not be downgraded. An X.400 API Association (XAPIA) {error code} reason code and {error code} diagnostic code were returned. [{value}{value}{value}{value}] (14)

Explanation
The message transfer agent (MTA) determined that this message’s recipient list (or the reported recipient list) contains one or more elements that cannot be downgraded for transfer over a 1984 X.400 backbone. The downgrade process occurs according to the rules defined in Blue Book X.419, Annex B.

User Action
Use message tracking to identify the message recipients, and modify the X.400 address values to allow messages to be sent over the 1984 connection. Or, if the backbone supports the later X.400 version, use 1988 X.400 protocols.