    "lmtp_destination_concurrency_limit", "$default_destination_concurrency_limit", &var_lmtp_destination_concurrency_limit, 0, 0,
    "relay_destination_concurrency_limit", "$default_destination_concurrency_limit", &var_relay_destination_concurrency_limit, 0, 0,
    "smtp_destination_concurrency_limit", "$default_destination_concurrency_limit", &var_smtp_destination_concurrency_limit, 0, 0,
    "virtual_destination_concurrency_limit", "$default_destination_concurrency_limit", &var_virtual_destination_concurrency_limit, 0, 0,
    "lmtp_destination_recipient_limit", "$default_destination_recipient_limit", &var_lmtp_destination_recipient_limit, 0, 0,
    "relay_destination_recipient_limit", "$default_destination_recipient_limit", &var_relay_destination_recipient_limit, 0, 0,
    "smtp_destination_recipient_limit", "$default_destination_recipient_limit", &var_smtp_destination_recipient_limit, 0, 0,
    "virtual_destination_recipient_limit", "$default_destination_recipient_limit", &var_virtual_destination_recipient_limit, 0, 0,
