Firewall errors And Exchange Blacklists

arnevee used Ask the Experts™
I am recieving almost continous errors on my Sonicwall log from the same IP address. Error reads:
"Malformed or unhandled IP Packet dropped"
I had recent issues with my Exchange Server and being blacklisted over and over. With help from this forum and others, I discovered a misconfigured Default SMTP Server, with a naming issue and an Open relay. Have since corrected both.  
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This is fairly common.. it is most likely some sort of attack or virus originating from the IP you see.   I've seen this on almost every sonicwall I have worked on.  Not much you can do about it other than blocking traffic from that IP, but you will most likely see it from other IPs also.

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