# Special Cases

The following header fields are special cases:

- JMS header `JMSDestination` corresponds to Rendezvous subject.
- JMS header `JMSReplyTo` corresponds to Rendezvous reply subject.
- JMS header `JMSExpiration` corresponds to the time limit of the Rendezvous certified message.
- JMS header `JMSTimestamp` corresponds to the time when the message was created. If this header field is not present, when the `tibemsd` receives the message it sets the `JMSTimestamp` to the current time.

Copyright © Cloud Software Group, Inc. All rights reserved.