$_='May  2 04:06:15 lon.mail.net exim[17905]: 2012-07-03 07:06:15 1SPPtO-0004en-PS <= me@ours.co.uk H=smtpout.mail.com [22.5.10.4] I=[6.5.14.4]:25 P=esmtp S=13333 id=6aeca3b79b8892d6105dab131c76f066@localhost.localdomain T="Half price offer"';

my @data= split(/ /);

my $Email=$data[10];
my $IP=$data[12];
$IP=~s/\[//g;
$IP=~s/\]//g;

print "Email: $Email\n";
print "IP: $IP\n";