Supress yum output when there are no errors...

Hi there.

We're running a bunch of RHEL-Systems and check for Updates every night running yum with a cron job.
Any error message is reported to our ticket-System (OTRS).

Since a few days yum is responding with the line "This system is receiving updates from Red Hat Subscription Management."

Is there any way to get rid of this message, as we only want to see messages when theres something updated or an error occured...

Thx for any advice.

Dirk Goj