[otrs] How to reduce number of syslog messages

I get a lot of messages of the form Jan 10 10:45:38 rush32 OTRS-CGI-10[16567]: [Notice][Kernel::System::Ticket::Arti cleSend] Sent email to '"Ferd Berfel" ' from 'Hfreej support SendAutoReply, Subject => [Ticket#: 20 05011010000077] Request received - Ticket created; that are appearing in /var/log/messages on our Linux system. I do not want purely informational messages like this to show up in /var/log/messages. How do I stop them? THanks, Adam Lewnberg