errors of running "snort -T"

[jordi <gaojianwen () gzidc com>]

My snort's version is 1.8.6 . I got the following messages when I ran "snort -T". So I have to disable these rules. 
What's wrong with my snort ? 

ERROR => Undefined variable name: (/etc/snort/misc.rules:27): AIM_SERVERS
ERROR => Undefined variable name: (/etc/snort/smtp.rules:8): SMTP_SERVERS
ERROR => Undefined variable name: (/etc/snort/exploit.rules:22): SMTP_SERVERS

-- 
Yours sincerely
JorDi <gaojianwen () gzidc com>



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