some mail don't get delivered

    • some mail don't get delivered

      I have a strange issue.

      In the past years/month I got successfully mails from my OMV system.
      But in the last couple of weeks sometimes my males got lost.
      it COULD be in conjunction with updating to OMV 4 and Debian 9.

      I am using a dedicated gmail account for sending the mails from my server. (
      The mail are send to a paid mail server (, wich again forwards them to another gmail account.

      After some test I thing I can reproduce the issue.

      This works


      1. echo $(date); echo -en "From: \"Test\" <>\nSubject: Testmail\n$(date)" | /usr/sbin/sendmail

      This does not work:


      1. echo $(date); echo -en "From: \"Test\" <>\nSubject: Testmail\n$(date)" | /usr/sbin/sendmail root

      Source Code

      1. l 18 23:18:00 magneto postfix/pickup[14553]: 769D7B200CA: uid=0 from=<root>
      2. Jul 18 23:18:00 magneto postfix/cleanup[13797]: 769D7B200CA: message-id=<>
      3. Jul 18 23:18:00 magneto postfix/qmgr[2743]: 769D7B200CA: from=<>, size=315, nrcpt=2 (queue active)
      4. Jul 18 23:18:00 magneto postfix/pipe[13800]: 769D7B200CA: to=<openmediavault-notification@localhost.localdomain>, relay=omvnotificationfilter, delay=0.04, delays=0.01/0/0/0.02, dsn=2.0.0, status=sent (delivered via omvnotificationfilterservice)
      5. Jul 18 23:18:01 magneto postfix/smtp[13799]: 769D7B200CA: replace: header Subject: Testmail: Subject: [] Testmail
      6. Jul 18 23:18:01 magneto postfix/smtp[13799]: 769D7B200CA: to=<>, orig_to=<root>,[]:587, delay=1.1, delays=0.01/0/0.43/0.63, dsn=2.0.0, status=sent (250 2.0.0 OK 1563484681 u186sm44351703wmu.26 - gsmtp)
      7. Jul 18 23:18:01 magneto postfix/qmgr[2743]: 769D7B200CA: removed

      When I log into I can see all mails in the send folder.
      Even the ones that don't got forwarded.
      When inspecting the "original message" (source code) of the mails in GMail I can see no difference between the ones that get send to and the ones that don't, except from timestamps and message-IDs.

      My `/etc/postfix/recipient_canonical` looks like this

      Source Code

      1. root
      2. cwempe


      Source Code

      1. # /etc/aliases
      2. mailer-daemon: postmaster
      3. postmaster: root
      4. [..]
      5. root: cwempe

      Another strange thing, the "to" is empty and only "bcc" is filled in the mails.
      Is this expected?…ac325ce5009c264a82e4ae1a9

      Any idea what the cause of this issue could be?

      My system:
      = OS/Debian information
      No LSB modules are available.
      Distributor ID: Debian
      Description: Debian GNU/Linux 9.9 (stretch)
      Release: 9.9
      Codename: stretch

      = openmediavault information
      Release: 4.1.23-1
      Codename: Arrakis


      = System information
      Linux magneto 4.19.0-0.bpo.5-amd64 #1 SMP Debian 4.19.37-4~bpo9+1 (2019-06-19) x86_64 GNU/Linux

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