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Thread: mail relay

  1. #1
    an0ther NNTP User

    Default mail relay


    Hello all,

    I'm looking to setup a simple mail relay using openSuse 11.0. I have
    found countless threads and documentation, but I think I may be
    over-thinking this a bit.

    This will just be used for things like mail alerts from servers,
    storage devices, printers, etc. Sending to an outside exchange server.

    I am fairly new to suse/linux. What do I really need? I believe I can
    do this with just postfix?

    Thanks in advance for any help!


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  2. #2
    ken yap NNTP User

    Default Re: mail relay


    That's trivial, just configure postfix to relay to an external server
    and to accept mail from all interfaces (so that other machines on your
    subnet can use it). This can be done using the YaST postfix
    configuration.


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  3. #3
    an0ther NNTP User

    Default Re: mail relay


    I'm getting this error in /var/log/mail.

    NOQUEUE: reject: RCPT from unknown[10.22.22.9]: 554 5.7.1
    <user@blah.com>: Relay access denied; from=<user@blah.com>
    to=<user@blah.com> proto=SMTP helo
    =<TeraStation>

    not sure what I'm doing wrong.
    I've configured only the myhostname, mydomain and mydestination
    variables in main.cf.

    any suggestions?


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  4. #4
    ken yap NNTP User

    Default Re: mail relay


    You have to allow your LAN machines to use the mail server. I'm not in
    front of a 11.1 machine at the moment so I can't tell you where it is in
    YaST but you have to allow it with mynetworks_style="subnet" in
    /etc/postfix/main.cf. It may be at "host" at the moment.


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  5. #5
    an0ther NNTP User

    Default Re: mail relay


    I had to use mynetworks_style="class" bc my relay server and devices are
    on different VLAN's, but its working now.

    Now that I have a feel for this I think I will lock it down by specific
    IP.

    I've been tweaking the files rather than using YAST, may as well learn
    linux the correct way, right? haha

    thanks for your help!!


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  6. #6
    ken yap NNTP User

    Default Re: mail relay


    No that's fine, you can edit main.cf yourself. But YaST will no longer
    control the config once you change main.cf manually. It is possible to
    control everything, perhaps slightly indirectly by editing
    /etc/sysconfig/postfix.


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  7. #7
    an0ther NNTP User

    Default Re: mail relay


    Good to know, thanks.


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