Generally you shouldn't ignore all of the mail HTCondor sends,
but you can reduce the amount you get by telling HTCondor that you don't
want to be notified every time a job successfully completes, only when
a job experiences an error.
To do this, include a line in your submit file like the following:

{code}
Notification = Error
{endcode}

See the Notification parameter in the condor_q man page on for more information.