Virus Scanning: Denial Of Service attack detected

[BG Mahesh]

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hi

I am using,

Redhat, sendmail 8.13.1, MS 4.37.7-1, clamav 0.80 and SA 3.0.2
Lately I see the following line in /var/log/maillog


Jan  4 03:18:07 blr MailScanner[21701]: Virus Scanning: Denial Of Service attack detected! 

Is there something I need to do to protect my system? 

regards,

--
B.G. Mahesh
bg.mahesh at indiainfo.com
http://www.indiainfo.com/

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