in reply to Parsing email

Just a wild guess: what happens if you open the file with a lexical variable to hold the filehandle and pass that variable to the constructor?

open my $bounced_message, '<', $full_name" or die $!;
...
my $bounce = eval { Mail::DeliveryStatus::BounceParser->new($bounced_m
+essage); 
+};

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CountZero

A program should be light and agile, its subroutines connected like a string of pearls. The spirit and intent of the program should be retained throughout. There should be neither too little or too much, neither needless loops nor useless variables, neither lack of structure nor overwhelming rigidity." - The Tao of Programming, 4.1 - Geoffrey James

In Section Seekers of Perl Wisdom