Bounce not Working

Hello,

http://mitahost.net/emailer/admin
I am using phplist 3.08 since last 6 month and work fine but after new version 3.12 installation through softaculous, i am not getting bounce back,
Also upload all latest plugins work fine, Unsubscribe is also work fine,
I get the bounce emails in my inbox but it is not shows in subscriber list in red mard in bracket as showing in previous version nor goes to unconfirm list.
For reference jpg file attached. ( I am new user so not able to upload jpg file so config.php details paste below )
Please help me to configure properly bounce emails problem.

=========================================================================

Settings for handling bounces

=========================================================================

*/

Message envelope. This is the email that system messages come from

it is useful to make this one where you can process the bounces on

you will probably get a X-Authentication-Warning in your message

when using this with sendmail

NOTE: this is very different from the From: line in a message

to use this feature, uncomment the following line, and change the email address

to some existing account on your system

requires PHP version > “4.0.5” and “4.3.1+” without safe_mode

$message_envelope = ‘phplist@mitahost.net’;

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

define (“MANUALLY_PROCESS_BOUNCES”,1);

when the protocol is pop, specify these three

$bounce_mailbox_host = ‘mail.mitahost.net’;
$bounce_mailbox_user = ‘phplist@mitahost.net’;
$bounce_mailbox_password = ‘Pass_word@#123’;

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’;

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 = 0;

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;
define(‘blacklist_email_on_bounce’, 1);

/*
Thanks & Regards,
Mita