Consider the following code:

use Net::IMAP::Simple::SSL;
use Email::MIME;

my $imap = Net::IMAP::Simple::SSL -> new ('imap.gmail.com');
$imap -> login ("LOGIN\@gmail.com" => 'PASS');
my @unseen = reverse sort $imap->search_unseen;
for my $i (@unseen) {
  my $msg = join '', @{$imap->get($i)};
  unless (fork) {
    if (&process (Email::MIME->new (\$msg)) eq "notouch") {
      $imap->unsee ($i);
      exit;
    }
  }
}
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&process() should decide whether or not to mark the message as \Seen. however, it doesn't work. Whatever &process() returns, the message is marked as \Seen. I think it has to do with the exit() the child performes - maybe that forces the message to be \Seen.

Any solution? thanks!