"test@test.com " is indeed bad. Notice the trailing space? It's easy to fix the address, though. 

sub trim {
   my ($s) = @_;
   for ($s) {
      s/^\s+//;
      s/\s+$//;
      return $_;
   }
}

...
my @other_addresses = map trim, split( /\n/, $email_list );
...

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In reply to Re^3: Validate newline delimited email list by ikegami
in thread Validate newline delimited email list by philosophia

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