Attachment & messages

[Aegyptiacus@aol.com]

Hello list
I keep receiving this message several times a day from various listmembers. Any 
of you is confronted with the problem (the warning is part of the message)? 
Could it be a spam?
<>
See the attached file for details

* * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
*         ---REMAINDER OF MESSAGE TRUNCATED---            *
*     This post contains a forbidden message format       *
*  (such as an attached file, a v-card, HTML formatting)  *
*    This Mail List at USC.EDU only accepts PLAIN TEXT    *
* If your postings display this message your mail program *
* is not set to send PLAIN TEXT ONLY and needs adjusting  *
* * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
<>

Cheers,
Jean-Michel