Someone help to check does bounce process email are config correct?

I am use pop protocol only,would you please help me check out my config are correct or not?
specially on below item,if I use pop, do I need disable this item?
$bounce_mailbox = ‘/var/spool/mail/listbounces’;

quote from my config file, please help to check, of course I have change the sensitive information such as host/user/password.

# Handling bounces. Check README.bounces for more info
# This can be 'pop' or 'mbox'
$bounce_protocol = 'pop';

# set this to 0, if you set up a cron to download bounces regularly by using the
# commandline option. If this is 0, users cannot run the page from the web
# frontend. Read README.commandline to find out how to set it up on the
# commandline

# when the protocol is pop, specify these three
$bounce_mailbox_host = '';
$bounce_mailbox_user = 'bounces';
$bounce_mailbox_password = 'bausdaalo';

# the "port" is the remote port of the connection to retrieve the emails
# the default should be fine but if it doesn't work, you can try the second
# one. To do that, add a # before the first line and take off the one before the
# second line
#$bounce_mailbox_port = '110/pop3/notls';
$bounce_mailbox_port = "110/pop3";

# it's getting more common to have secure connections, in which case you probably want to use
#$bounce_mailbox_port = "995/pop3/ssl/novalidate-cert";

# when the protocol is mbox specify this one
# it needs to be a local file in mbox format, accessible to your webserver user
#$bounce_mailbox = '/var/spool/mail/listbounces';

if I use pop, do I need disable above item?

# set this to 0 if you want to keep your messages in the mailbox. this is potentially
# a problem, because bounces will be counted multiple times, so only do this if you are
# testing things.
$bounce_mailbox_purge = 1;

# set this to 0 if you want to keep unprocessed messages in the mailbox. Unprocessed
# messages are messages that could not be matched with a user in the system
# messages are still downloaded into phpList, so it is safe to delete them from
# the mailbox and view them in phpList
$bounce_mailbox_purge_unprocessed = 1;

# how many bounces in a row need to have occurred for a user to be marked unconfirmed
$bounce_unsubscribe_threshold = 5;