Frustrated with large number of bounces in mail queue

I just moved all the accounts to a new server. I was running MailScanner on the old server. I've cleared the mail queue of all the junk earlier today also and now i see 786 emails in queue. They are all junk of bounces.
What am I doing wrong? It is my understanding if they are in queue then the exim will try and try to deliver them.
Or should I just ignore the fact that there are so many in queue.

typical bounce message:

Code:

[B]Data spool file[/B]
1ZBewe-0006dA-TU-D
This message was created automatically by mail delivery software.

A message that you sent could not be delivered to one or more of its
recipients. This is a permanent error. The following address(es) failed:

[EMAIL]jomcm@domain.net[/EMAIL]
(ultimately generated from [EMAIL='lynnmcmillen@domainontheserver.com']someemail@domainontheserver.com[/EMAIL])
host mx.example.com [64.8.71.111]
SMTP error from remote mail server after end of data:
554 5.7.1 [P4] Message blocked due to spam content in the message.

 

i understand that but as I understand also this is a bounce back because of a fail. Unfortunately I have cleared all the emails in the queue.
The emails was sent to a user on the server, it rejected the emails and did a "fail:
This means they sent email to someone on my server, it rejected and then got a bounce back. HA.
The problem however is this sort of thing fills up the queue and is not deleted.

 

my bad.
email sent to user.
user had a forward on.
Email marked SPAM and emails forwarded to external (like gmail)
external refuses email and sends it back.

you get the point. seems a round robin.
But still emails stays in queue, never gets deleted unless host admin deletes them.

should I write a script to check queue and delete if exceeds so many?

 

The option is grayed out not letting me choose this option.

 

That is how I see it. I attached an image