[Koha] Hi! + a newbie question about nullmailer

Hello! I'm a new user of Koha.A friend needs to use the system at his library and I'm helping with the backend. Glad to join the Koha Community! ********************** I've had the system up and running.So far it's been smooth and fun except for a glitch. nullmailer came to be installed together with Koha and it's been causing mail.log and mail.errto blow up to 10GB in sizes, with lines that typically look like this: Sep 8 04:08:05 klc1 nullmailer[2290]: message repeated 694 times: [ smtp: Failed: Connect failed] I'm not currently sending emails so I removed nullmailer altogether from the system. Did I configure koha incorrectly during installation? ch