How to turn off email notification from abrt

Issue

• When abrtd service works and detects occurring a crash, abrtd always send an email to local user. Are there any ways to turn off the email?

===> /var/log/messages

Mar 19 22:03:41 myhost2 abrtd: abrtd: Sending an email...　
Mar 19 22:03:41 myhost2 abrtd: Email was sent to: root@localhost

==> /var/log/maillog <==
Mar 19 22:03:41 myhost2 postfix/pickup[27757]: 99DE81A1AD0: uid=0 from=<user@localhost>
Mar 19 22:03:41 myhost2 postfix/cleanup[28714]: 99DE81A1AD0: message-id=<532995ad.r2eV1Z3U8u4WepXa%user@localhost>
Mar 19 22:03:41 myhost2 postfix/qmgr[1690]: 99DE81A1AD0: from=<user@localhost.hostA.redhat.com>, size=43180, nrcpt=1 (queue active)
Mar 19 22:03:41 myhost2 postfix/local[28720]: 99DE81A1AD0: to=<root@localhost.hostA.redhat.com>, orig_to=<root@localhost>, relay=local, delay=0.3, delays=0.23/0.01/0/0.06, dsn=2.0.0, status=sent (delivered to mailbox)
Mar 19 22:03:41 myhost2 postfix/qmgr[1690]: 99DE81A1AD0: removed