Exchange 2010 SP1 Email Queue

Running SBS2011 SP1. I notice a buildup of stuck emails in the queue viewer in Exchange Management Console. These emails are all spam. How do I prevent them from building up there? See picqueue viewer detailsqueue viewer
yohayonAsked:
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AmitIT ArchitectCommented:
It more look like to me DNS issue at ISP end rather SPAM issue, second screenshot shows domain like citibank which is a valid domain, so it shouldn't be in queue. Normally, Exchange will try to send email for next 72 hours and then it will be dropped, you can decrease that timings if required.
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yohayonAuthor Commented:
Again, all emails stuck in queue are SPAM. Verified. Please advise of resolution. Thank you
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AmitIT ArchitectCommented:
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yohayonAuthor Commented:
Thank you for your time & response. It would be more helpful to respond exactly to the question at hand than to provide a link which does not address the core issue. Currently I do have Vipre Email Security install on the SBS server.
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pradeep7880Commented:
I believe, your Vipre is marking those emails as SPAM and blocking it. Also I would check my ip address which is responsible for sending email out for blacklisting.
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yohayonAuthor Commented:
Resolved: It seems that signature updates in our sonicwall router detected valid emails as threats
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yohayonAuthor Commented:
This resolved my issue
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