[ILUG] Out-of-date spam ?

[Timothy Murphy]

As a matter of interest, why does the spam I get
often have an old date on it ?
Eg just arrived:

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Aggressive traders benefit from record-shattering achievements
From: Pauline Gonzalez <jivjh at americanus.com>
To:  tim at birdsnest.maths.tcd.ie
Date:  12/03/05 03:18
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-- 
Timothy Murphy  
e-mail (<80k only): tim /at/ birdsnest.maths.tcd.ie
tel: +353-86-2336090, +353-1-2842366
s-mail: School of Mathematics, Trinity College, Dublin 2, Ireland