You have mail in /var/spool/mail/root
[root@kolab ~]# mail
Heirloom Mail version 12.4 7/29/08. Type ? for help.
"/var/spool/mail/root": 1 message 1 new

N 1 Anacron Fri Mar 11 20:42 24/892 "Anacron job 'cron.daily' on kolab.example.org"

&
Message 1:
From root@kolab.example.org Fri Mar 11 20:42:52 2016
Return-Path: <root@kolab.example.org>
X-Original-To: root@kolab.example.org
Delivered-To: root@kolab.example.org
X-Virus-Scanned: amavisd-new at example.org
X-Spam-Flag: NO
X-Spam-Score: 2.437
X-Spam-Level: **
X-Spam-Status: No, score=2.437 tagged_above=-10 required=6.2
tests=[DNS_FROM_AHBL_RHSBL=2.438, NO_RELAYS=-0.001] autolearn=no
From: Anacron <root@kolab.example.org>phrazle