Problems with pre-existing Mailman lists

  • I still cannot send any messages to lists that are pre-existing. I still get the error:

    1. SMTP Error (550): Failed to add recipient "" (5.1.1 <>: Recipient address rejected: User unknown in virtual mailbox table).

    I do not have very many subscribers, so I just deleted my lists, recreated them, and I have no issues that I can see now. Just sending an fyi to inform of the persistent issue for existing lists .. Some people with big lists may not have it so easy to recreate their lists.

    System Details
    Debian GNU/Linux 8.8 (jessie)
    PHP Ver: 5.6.30 (Default)
    MYSQL Ver: 5.7.17
    Vsftpd Ver: 3.0.2
    i-MSCP 1.4.6 | Build: 20170616| Codename: ZImmer

    Plugins Installed and Active
    AdminerSQL - Ver. 1.0.1
    ClamAV - Ver. 1.2.1
    CronJobs - Ver. 1.4.1
    DomainAutoApproval - Ver. 1.1.2
    InstantSSH - Ver. 5.0.1
    LetsEncrypt - Ver. 3.2.1
    Mailgraph - Ver. 1.1.1
    Mailman - Ver. 2.0.1
    Monitorix - Ver. 1.2.2
    OpenDKIM - Ver. 1.1.3
    PanelRedirect - Ver. 1.2.0
    PhpSwitcher - Ver. 3.0.6
    PolicydSPF - Ver. 1.1.0
    PolicydWeight - Ver. 1.1.0
    Postgrey - Ver. 1.1.1
    Postscreen - Ver. 1.1.2
    RoundcubePlugins - Ver. 2.0.1
    ServerDefaultPage - Ver. 1.3.0
    SpamAssassin - Ver. 1.2.0

    “Life is all an Elaborate Hoax”

  • @texxasrulez

    Without further details, we cannot help.

    • What was the version of your Mailman plugin before upgrade to version 2.0.0?
    • Logs ???
    • ...

    Also, instead of removing lists by closing eyes, best would be to give us a chance to fix the problem.

    I hope that you did read the file inside the plugin archive before updating.
    You can always give us access to the server for further investigation.


  • Sorry, I do not need help, just saying there is still a problem somewhere with mailman. I am in the middle of my own stuff so I do not have time to investigate this any further and that is why I just deleted my lists and started over. I ALWAYS read the update and errata files before proceeding with anything ...

    “Life is all an Elaborate Hoax”

  • Should be fixed in latest version. See Mailman plugin v2.0.3 RELEASED
    Thread closed.


  • Sorry for delay. Just moved and my server isn't booting from the 1500 mile trip. As soon as I get time to get her to boot up, I will verify.

    Thanks ... :D

    “Life is all an Elaborate Hoax”