SMTP Relay Solution Via Provider



  • Hello,
    Not sure if this is the best place to post this issue…but I’ll try:

    In the context of kopano installations, I have read about
    "SMTP Relay Solutions via Provider"
    There are great posts from Andreas about that.

    Before I am going to install a Kopano server for my big family, I would like to understand a few things.

    So far, I see the these steps required:

    so far, so good…

    The domain “wir.com” is hosted at myISP, where I am getting the SMTP access credentials from, before adding them to the postfix smtp_auth file.

    Now some questions:

    1. Is it possible to add further smtp accounts, also of other domains?
      So, do I need to do these smtp_auth entries for ALL users using other domains (uns.com, gmail.com,…)?

    2. What exactly has changed after restarting the postfix module with the newly configured amtp_auth file?

    3. Does it have any infulence on how the sender email address appears for the recipient?

    4. Does it mean that sending emails out of Kopano as tochter@wir.com or sohn@gmail.com, always appear at the recipient with the sender address "MeinName@wir.com"?

    I hope I could explain my questions well enough…
    I am aware of the spam-topic, so a professionally hosted ISP mail server (blacklists, SPF, etc) are certainly a good choice in such a setup.

    Thanks,
    Thomas



  • Hi Thomas,
    what are you planning in general?
    Will the Kopano server be at your home or on a virtual machine at the internet?
    As far as I understand - the MX should point to your provider and kopano server will collect mails from several other accounts?
    Which post from Andreas did you mean?
    Best regards



  • Hello Merlin,

    I was referring to this article:
    https://www.univention.de/2016/08/einmal-kopano-to-go-bitte/
    where Andreas is partly pointing out how to make use of an SMTP relay, so I asked here for more details.

    Kopano will run on my own physical server.
    The users (partly) already have their email addresses, which I would like to use for their Kopano accounts (actually, they do not want to change their existing email accounts), as pointed out in the exampes above.

    Thanks,
    Thomas



  • Hi @ThomasB ,
    do you have experience with Linux and postfix?
    Looks like with postfix it’s possible:
    https://serverfault.com/questions/277651/how-can-i-get-postfix-to-send-mail-to-different-relay-hosts
    http://www.postfix.org/SASL_README.html#client_sasl_sender
    If your server is at home, ensure you have at least VDSL connection and a dyndns Service.

    best regards
    Merlin


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