Mis-Matching traffic with PCRE Rules

[waseem sarwar <waseemsarwar103 () hotmail com>]

Hi,
I have a pcre based rule as follow in my rules file,
alert udp any any -> any 53 (msg:"MALWARE domain capodeicapi.eu"; pcre:"m/capodeicapi.eu/i"; classtype:trojan-activity; 
sid:5000968;)
The issue I am facing is that this rule also matches for the domain http://capo.eu which it should not match. I am also 
facing similar problem with more pcre rules such that they match sub string based url of actual rules . I am using 
snort version 2.9.1.
Kindly let me know if I have any problem with snort syntax or pcre usage and how to resolve it. Your help will be 
highly appreciated. Thanks in anticipation. 
Regards,Waseem

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