That is a message from an MS Exchange user.  

What is your Language= setting?  

From the ListServ help:
Language=EXCHANGE: This setting allows you to specify that LISTSERV keep
Microsoft Exchange attachments in postings (the default is to remove them).
You specify either Language= EXCHANGE or Language= idiom,EXCHANGE to enable
this feature. Note that this affects "application/ms-tnef" attachments only
-- LISTSERV does not currently strip WINMAIL.DAT attachments. 


*********************************
* Erik Sojka, MOS, MCSE         *
* Asst. VP, Technology Services *
* [log in to unmask]               *
********************************* 

> -----Original Message-----
> From: Mans Nilsson [mailto:[log in to unmask]] 
> Sent: Thursday, August 14, 2003 5:14 AM
> To: [log in to unmask]
> Subject: Attachments let through in spite of block
> 
> 
> Hi, 
> 
> I've got a list with 
> 
> Attachments=        	
> 
> set, yet a WINMAIL.DAT got through. Huh? 1.8d on Solaris (SEGATE).
> 
> -- 
> Måns Nilsson         Systems Specialist
> +46 70 681 7204         KTHNOC
>                         MN1334-RIPE
> 
> YOW!!  Everybody out of the GENETIC POOL!
>