{
    return "" if (defined $EmailUnknownUser && $EmailUnknownUser ne 'returntosender');

    # Make a list of all valid local recipients
    use esmith::AccountsDB;
    my %valid = map { $_ => 1 } qw(group pseudonym user mailmanlist mailinglist);

    $OUT = "";

    my $adb = esmith::AccountsDB->open_ro();
    foreach my $account ($adb->get_all)
    {
        my $key = $account->key;
        next unless $valid{$account->prop('type')};

        $OUT .= "p*:$key:\n";
        $OUT .= "p*:$key\@*:\n";
        $OUT .= "p*:$key-*:\n" unless ($account->prop('type') eq 'group' || $account->prop('type') eq 'pseudonum');
    }
}
