unable to resolve host in "mail"

Discussion in 'Server Operation' started by Bent Brüggemann, Feb 5, 2018.

  1. Bent Brüggemann

    Bent Brüggemann New Member

    Hey Guys and Girls,

    I'm having a strange issue which I cannot solve by myself:

    Every night I'm getting mails to the root account (around 3am):
    Message 1:
    From [email protected]xxxxxx.de Mon Feb 5 03:02:43 2018
    X-Original-To: [email protected]xxxxxx.de
    X-Virus-Scanned: Debian amavisd-new at
    To: [email protected]xxxxxx.de
    From: [email protected]xxxxxx.de
    Auto-Submitted: auto-generated
    Subject: *** SECURITY information for xxxxxx.servers.jiffybox.net ***
    Date: Mon, 5 Feb 2018 03:02:28 +0000 (UTC)

    xxxxxx.servers.jiffybox.net : Feb 5 03:02:28 : root : unable to resolve host xxxxxx.servers.jiffybox.net

    I'm running Ubuntu Server with ISPConfig installed and until now (this issue might be since beginning...) without problems I found at all.
    I tried to ping the host mentioned above with success. Furthermore I searched for dirs in: /var/vmail/ and just found my domains running on the server. May there somehow lie the mistake?

    Where should I start looking?

    Cheers,
    Bent
     

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