You have a common precedence issue. Change the following line. 
open FILE, $filename || die $!;

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to 
open FILE, $filename or die $!;

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or if you really want to use || 
open(FILE,$filename) || die $!;

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also it wouldn't hurt to be more verbose: 
die "Could not open $filename: $!\n";

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UPDATE: The usage of the \g modifier is for multiple matching,substituting,etc. you don't need it if you know what you are searching for only occurs once as is the case:

The original value of $from is "--from me@mydomain.com \"

EXAMPLE:
$str ='abcd';
$str =~s/a//g; # \g unnecessary
##
$str = 'abacad';
$str =~s/a//g; # more appropriate

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It wouldn't hurt to also have a look at perlop

-tengo mas que aprender

In reply to Re: Removing data from a string with Regex by s0ttle
in thread Removing data from a string with Regex by IPstacks

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