Message SAP XS811 - No delivery to &, as part of message cannot be transferred

Diagnosis
The message could not be delivered to recipient &V1& as part of themessage could not be transferred.

System Response
Processing was ended normally.
Additional information of the node used (in the system language of thenode):
V4

Procedure
Part of the message could not be transported all the way to recipientV1. this is usually due to particular binary attachments. check themessage and remove oversized attachments and attachments that requirespecial coding, for example.