Using properties or headers to persist meta information on the exchange?

[Marco Zapletal]

Hi,

I learned from this thread 
(http://camel.465427.n5.nabble.com/How-long-do-the-camel-headers-live-in-routes-td474477.html) 
that one should use properties instead of headers in order to durable 
store meta information on an exchange (acc. to one of the postings, 
headers can get lost at endpoints).

I would like to know whether this in principle correct. If so, I ran 
into the problem that properties seem to stripped away if an exchange 
goes through a JMS queue. Could anyone tell me what's the recommended 
approach to keep meta information durable on the exchange.

thanks,
marco