Setting Up Zimbra Collaboration Suite (ZCS) on RHEL/CentOS 7/6

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Matei Cezar

I'am a computer addicted guy, a fan of open source and linux based system software, have about 4 years experience with Linux distributions desktop, servers and bash scripting.

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26 Responses

  1. Ofrates Siringan says:

    Thank you Matei Cezar and Techmint Community for providing this excellent tutorial. Our Zimbra Collaboration Suite was deployed in VM with the latest release of Zibra 8.7.0, our mail system is working great.. By the way how can I load any other SSL certificate instead using the default certificate provided by Zimbra during installation, again thank you very much…

    Please let me know.

  2. krish says:

    Please post how to configure zimbra on rhel 6.4. same way or different ?

  3. Raja Reddy says:

    Hi Ravi,

    This is Raja Reddy. I installed Zimbra 8.5 open source collaboration suite on Centos 6.5. But SMTP authentication fails with outlook client configured on other network. Works well within same network. Also works anywhere using webmail. Please help me in this regard.

    • Matei Cezar says:

      You should check out the policies on the routers. Try to ping and use telent or netcat from other networks to troublleshoot the smtp ports on the server. If you can reach smtp ports(25, 465, 586) using telnet or netcat from local LAN and not from other networks, clearly there are some rules on your gateways or routers which block stmp comunication and you should investigate this issue further.
      Seems that ports 80 or 443 are not blocked that’s why you can access webmail service.

    • Matei Cezar says:

      You can also use nmap port scanner to check if proper ports are opened. Scan with nmap from hosts on the networks you cannot reach smtp service

  4. R RAUT says:

    I have unable to send mails. I have getting bounce mails with following text

    ”host[] said: 530 5.7.57 SMTP;
    Client was not authenticated to send anonymous mail during MAIL FROM (in
    reply to MAIL FROM command)”

    What could be the reason for this error.

    Best regards

    • Matei Cezar says:

      Are you relying mail via office365? You use a mail client such as Outlook or Thunderbird? Check the following settings if that’s your case:
      My outgoing server (SMTP) requires authentication.
      Use same settings as my incoming mail server.

  5. R Raut says:

    Do you have installation tutorial for open xchage installation?

    Best regards

  6. James says:

    Hi, Many thanks for the tuitorial. I have installed it at work and its working like a charm.

  7. R Raut says:

    Is it advisable to change admin port from 7071 to something else? How can I change it?

    Best regards..

    • Matei Cezar says:

      No…leave the port as default! for what reason do you need to change admin port.

      • R Raut says:

        For security reason.. So no body can access my admin portal url.
        Best regards

        • Matei Cezar says:

          That’s not a security feature what you’re trying to mangle there (security through obscurity is what you’re trying to accomplish).The port can be easily spotted with nmap or other network scanner. If you want nobody to access your portal use a firewall to block all requests and use a rule to open only the IP address that you’re using to connect to Zimbra.

  8. R Raut says:

    Hello Matei,
    Thanks for link. Yes I have read this document. But I have not getting how can I create CSR in centos 7. And once we get certificate from issuer then how can I store it on centos server. As I have windows background and quite new to linux. We can not upload it like windows. Is zimbra use Apache? Should I install openssl to create CSR?
    Please guide.

  9. R Raut says:

    Excellent Tutorial.. My Zimbra Is working great.. By the way how can I load comodo or any other SSL certificate instead default certificate.

    Please let me know.

  10. Ernest says:

    Hi, thanks for the brilliant article… I once had a struggle with self signed certificates but nonetheless I managed.

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