hide target server address in bounce messages

[Michael McCallister]

Hello,

I currently use relay_domains and relay_transport as a means to relay 
email on to another mail server which hands off to the MDA. Everything 
works well.  Occasionally there may be a delivery problem when talking 
to the relay_transport that results in a bounce being generated by 
postfix - an expected behavior of any MTA.  What I need to do is hide 
details (the IP address) of the relay_transport in the bounce message 
due to security concerns.  I tried using the bounce template 
configuration to do this, but postfix adds this information anyways.  Is 
there any way to hide this information?

Thanks!
Michael