I created the batch file (follows) and inserted DOS SET EMAILADD="%Internet Email Address" in the login script. If version 1.12 of the headers extension is used, the sending hostname is pasted to all outbound messages. I run the batch using ZENworks but could easily be done from any login script. etc.

@ECHO OFF
echo [%EMAILADD%]>U:\PMAIL\headers.pm
echo header1=Received: from %COMPUTERNAME%>>U:\PMAIL\headers.pm
CLS
@EXIT

I need to be able to better track the sending workstation(s) on my LAN. I use Mercury/32 4.52, Pegasus Mail 4.31 NDS mode with Netware 6.5 SP6 servers. Having queues on all servers has made it much easier for me to perform maintenance on Mercury and I have much fewer issues with users because mail is always "sent" (instead of using Pegaus Mail in SMTP -> Mercury configuration).

 
I've tried using GRT's Headers extension with no success. I am needing to add the sending hostname / %COMPUTERNAME% (DHCP leases make the IP addresses unreliable) to all outbound messages. Is there some other extension / batch file / tool / Pegasus Mail - Mercury setting that will add another [Received: from] header (or [X-header]) to the messages?