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Thread: why is "X-Originating-IP" per default enabled?

  1. #1
    yogg1 is offline Loyal Member
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    Default why is "X-Originating-IP" per default enabled?

    Hi

    My System:
    Release 7.2.3_GA_2872.UBUNTU8 UBUNTU8 FOSS edition.
    But for all versions the same problem.

    In the admin panel there is under "global configuration -> MTA" the option "add X-Originating-IP to mail". This option is per default on.
    If this is on the original IP address of sender will be added as an extra option to the mail header.

    I see two problems there:
    1.)
    Privacy. Why should the receiver see the original IP address?

    2.)
    Spam. Many spam filters (Zimbra included) use this option in a wrong way. They say the mail was sent from a private range that is on a anti spam list and mark this mail as spam.


    So why is this option per default enabled?
    What are the positive effects of this option (I have really no idea in which situation the original IP is useful)?

    Is it required to restart the zimbra services if I disable the option?

    yogg
    Release 7.1.2_GA_3268.UBUNTU8_64 UBUNTU8_64 NETWORK edition.

  2. #2
    phoenix is offline Zimbra Consultant & Moderator
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    Quote Originally Posted by yogg1 View Post
    I see two problems there:
    1.)
    Privacy. Why should the receiver see the original IP address?
    It's meant for installations that need to track which IP sent mail possibly for legal or spamming reasons. What difference does it make if anyone outside of your LAN sees a Private IP address, it's non-routable and cant' be accessed from outside your LAN.

    Quote Originally Posted by yogg1 View Post
    2.)
    Spam. Many spam filters (Zimbra included) use this option in a wrong way. They say the mail was sent from a private range that is on a anti spam list and mark this mail as spam.
    No, it doesn't. The x-originating-ip is never treated as anything other than what it says it is and isn't discarded by any anti-spam system that I've ever come across - I use that header in my emails and I've never had a problem. What you're (possibly) talking about is the apparent mail server IP address is forged as a private IP - unless you have evidence to the contrary. I assume you mean mail coming into a Zimbra server rather than mail submitted by your users - there is one Spamassassin bug that causes mail submitted by your users to get caught as spam.

    Quote Originally Posted by yogg1 View Post
    So why is this option per default enabled?
    Why not, a default has to be something and obviously Zimbra chose that because people asked for it.
    Last edited by phoenix; 09-19-2013 at 03:35 AM.
    Regards


    Bill


    Acompli: A new adventure for Co-Founder KevinH.

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