[Dovecot] How to remove Dovecot (LMTP) information from Email header

[Anant]

Hello All,

I want to remove  Dovecot (LMTP) information from Email Header, Please 
help me. I am using Dovecot 2.0.9 with Exim.

Received: from XX.XXblue.co.uk
        by XX.XXblue.co.uk*(Dovecot) with LMTP id*  XIuTJkJFxVLKTwAAG2fxGQ
        for <anant.saras...@techblue.co.uk>; Thu, 02 Jan 2014 10:59:28 +0000
Received: from [210.7.64.2] (helo=[192.168.100.71])
        by solo.techblue.co.uk with esmtp (Exim 4.72)
        (envelope-from <sysad...@techblue.co.uk>)
        id 1Vyfzr-0005Oy-7H
        for anant.saras...@techblue.co.uk; Thu, 02 Jan 2014 10:59:28 +0000



Thanks & Regards,
Anant Saraswat