my ($tmpdir, $for_destroy) = tmpdir();
my $cfg = "$tmpdir/cfg";
my $newsgroup = 'inbox.test';
-my $mailbox = "$newsgroup.1-50000";
+my $mailbox = "$newsgroup.0";
{
open my $fh, '>', $cfg or BAIL_OUT "open: $!";
print $fh <<EOF or BAIL_OUT "print: $!";