Some of my users have been getting 15 - 30 messages a day recently. The problem is that these don't appear as ads like most spam, in fact I am not able to see where these messages are selling or refering to anything.

Can anything be done to cull these out better? If anything the common factor is that most of them appear to be from outside the US.

Here is an example:

"
Subject:
headgear
Date:
Fri, 21 Jul 2006 10:30:36 +0300
From:
Nancy Stephens <hluzrnfuozr@zspruhonice.cz>
To:
<xlicense@ourcompany.com>



restrict maternal: sill of unchanged a park. was decompose, the cold
morgue crossword, as leave carelessness secure hemorrhage, the
resourcefulness, the lesson or dainty, to an respectively sweetie
single-digit?
suppress, and as assumption as Antarctica black magic rear-end but peg
harlot ally, lusty, chivalrous, or quilt!!! absorb of tablespoonful a
conspirator was great-grandfather gobble haphazard greyhound offset
smoking session seduce famine,. the of annex wrong balance of power
intricately as jointly to virtue. that
"

The messages don't seem to follow any pattern and have no attachments or graphics like most spam/phish/worms. Any ideas or suggestions?