The keys function was missing in your example in line 3... 
sub printhash {
    my $hash = shift;
    for my $key (keys %{$hash}) {
        print "$key : $hash->{$key}\n";
    }
}

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In reply to Re^2: My first Perl application! mailsumm.pl by hexcoder
in thread My first Perl application! mailsumm.pl by gizmoguy

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