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Content of /var/spool/mail/root:
From root@test.corp.test.biz Fri Feb 23 12:40:02 2018
Return-Path: <root@test.corp.test.biz>
X-Original-To: root
Delivered-To: root@test.corp.test.biz
Received: by test.corp.test.biz (Postfix, from userid 0)
id 202C12C0A32; Fri, 23 Feb 2018 12:40:02 -0500 (E...