troubleshooting Question

Message Queue Viewer | Is Hackers using my SMTP for SPAMING ?

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gs1uk asked on
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Hi Experts,

I use a SBS 2008 server and would like some help from you.,

Today I just had a look at my Message Queue Viewer and noticed there are many address I dont send which was saying undelivered. when I opened them I saw these messages in the queue.
-----------------------------------------------------------------------------------------
Identity: SRV0801\27936\58191
Subject: Undeliverable: Max-Gentleman*Enlargement*Pills
Internet Message ID: <c7f88d63-c21b-4d02-a0cc-a5351c47d134>
From Address: <>
Status: Retry
Size (KB): 8
Message Source Name: DSN
Source IP: 255.255.255.255
SCL: -1
Date Received: 08/08/2011 12:00:00 PM
Expiration Time: 10/08/2011 12:00:00 PM
Last Error: 451 qqt failure (#4.3.0)
Queue ID: SRV0801\27936
Recipients:  siks@nfml.com
-----------------------------------------------------------------------------------------

Is my SMTP server compromised and How do i block it from hackers using it.

Please help.

Many Thanks
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