log level

I downloaded a perl script from http://www.tahina.priv.at/~cm/spam/ and
it logs its activity.  I wish to have my logs exclude level 'debug'.

Things tried:
1) Contact author -> no reply
2) Alter syslog.conf "mail.*" to "mail.info" and restart syslogd -> No
Joy
3) Remove "-d" from the startup parameters -> no logging at all

Would someone be so kind as to assist me to alter the code I downloaded
so that the logging is as desired?  If so, please provide explanation;
I'd prefer to be less of a moron...
--
gypsy
who understands about 40% of the code in meta-greylist