We use a product called Xwall for spam blocking. Xwall will tag an email based on content, and a list from 10 companies that keep up to date spammers. These are tagged before SWCP. We set up a rule in Exchange that filters these emails to a folder so they can be reviewed and verified that they are in fact spam. We average about 10 good emails for each 10K we receive. We also set up rules to help block spam and use Key Word Groups with workds like mortgage, viagra etc. This works well. We have the rule close the transaction and send it to the default skillset
We currenly have 18 MM_skillsets. If you change the above mentioned configuration, you can get it pretty close to acheving how you want it. Our thought is if the email is requeued, it should only be a matter of 10 minutes before it is presented again based on our configuration. You can leave that call in presented state longer if you need to.
As far as closing the transaction, we did the field trial for Nortel on SWCP RLS4,a year and a half ago. We requested the closed reason code feature. This allows more accurate reporting of the email. We handle email for 385 email addresses for our clients. We have to bill each time the agent handles the email. That's why we do not use "New Reply" in our system. All emails, even responses from customers, come in as "New Transactions. It still keeps all the history etc. but allows us to report more acurately. And bill correctly.
Reply's from customers go back to the end of the line.