LMTP Header tweaks

[olafth]

Hi,

the delivery mechanism of Zimbra is a little too informative for our taste, we'd like to hide all information about the delivery path the mail takes internally.

We have the information, how to do this in both postfix and amavis. Unfortunately, the message is forwarded to the mailbox server via LMTP and the final mail still contains:

---> Received: from mtai.domain.com (LHLO smtp.domain.com)
---> (192.168.68.121) by mailbox.domain.com with LMTP; Mon, 15 Sep 2008

Does anyone know how to switch this off (or change it to something static)?!

Thanks!

PS: and to make it even more challenging: the same goes for IMAP4. So the header of this message is wrong. Anyone?!