Am i missing anything in the setting? message not sending

Hello all,
I am new to phplist,

in the config.php file i added my mail details as seen in the below section with “********************”

// when the protocol is pop, specify these three
$bounce_mailbox_host = ‘';
$bounce_mailbox_user = '
’;
$bounce_mailbox_password = ‘*****************’;

And

// if you want to use smtp authentication when sending the email uncomment the following
// two lines and set the username and password to be the correct ones
$phpmailer_smtpuser = ‘**';
$phpmailer_smtppassword = '
’;

And when i try sending message from phplist admin i got the below messages
…
Started
Processing has started,
One campaign to process.
Please leave this window open. phpList will process your queue until all messages have been sent. This may take a while
Report of processing will be sent by email
Processing campaign 2
Looking for subscribers
Found them: 1 to process
Warning: script never reached stage 5
This may be caused by a too slow or too busy server
…

Did i get the above config.php file setting correctly?

Are there other things i need to to do to start sending messages successfully ?

phplist 3.6.15?

Regards
Over

@Overcominglove Look on the Event Log page for any error reported. Possibly the email address is not valid.

Thanks @duncanc,

I checked the event log page and discovered that the sender email address was wrong, i updated the email address and was able to send campaign successfully.

Thanks again