Sending out SPAM

I have a customer that has just been blacklisted by 10 services for sending out SPAM.  We have ran Symantecs NPE (power erase) on all machines (35 or so) but CBL still states that SPAM is being sent out.

How can I attempt to detect the computer(s) sending the SPAM?
Sheldon LivingstonConsultantAsked:
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NVITEnd-user supportCommented:
Does it show at http://cbl.abuseat.org?
Did you request to be removed?
Sheldon LivingstonConsultantAuthor Commented:
It does show... don't want to remove it and still be sending SPAM as future removals are an issue.  Want to make sure we're clean.
NVITEnd-user supportCommented:
Does NPE show a log you can review to find the offending computer(s)?
The CBL will continue to show until you request removal.

For added assurance, run additional scanners like Malwarebytes.
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Sheldon LivingstonConsultantAuthor Commented:
NPE is ran on the computers and then displays things it believes is the issue.  You can then remove the things thought to be an issue.
NVITEnd-user supportCommented:
Hi classnet... Just wondering if you still need help with this or not. Either way, if you would close your question appropriately I'd really appreciate it.

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Sheldon LivingstonConsultantAuthor Commented:
Sorry about the late response... we used NPE to clean the computer.  All seems well now.
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