You're not very specific in your question... but if

Received: (qmail 21565 invoked by uid 9); 7 Apr 2001 13:27:27 -0000
To: php-general@lists.php.net
From: "Andre Bajew" <AndreBajew@TechnologyArt.com>
Date: Sat, 7 Apr 2001 08:27:44 -0500
[download]

is in $line, you could:

my ($extract) = $line =~ m#^(From: .*?)$#m;
[download]

- FrankG