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  1. Replies
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    Since this is found to be a major security risk,...

    Since this is found to be a major security risk, I have asked Zimbra Support if it's possible to untick this for everyone by default under CoS or disabled it in CLI without expecting every user to...
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    FYI, we found out the reason. We were previously...

    FYI, we found out the reason. We were previously hosted on the same email server - SingTel.
    When we migrate out, SingTel failed to remove our domain from their email server, thus any email to us...
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    Important: Zimbra security preference

    Recently, we have received some external emails that attempt to impersonate some of our colleagues for fraud.

    For example, when you receive an email from "Boss <scam@gmail.com>",
    Zimbra will show...
  4. Security against scammers and fake email address?

    Is it possible to configure Zimbra such that outsiders who attempt to fake email account from one of our hosted domains will automatically get deleted or at least marked as spam?

    What about...
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    246

    Thanks ccelis! I will plan a downtime to upgrade...

    Thanks ccelis! I will plan a downtime to upgrade Zimbra. As i'm on Ubuntu 8, I will have to upgrade Ubuntu first. :(
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    Thanks ccelis! We are using 7.2.6 at the moment....

    Thanks ccelis! We are using 7.2.6 at the moment. So RSHBL is not supported or just not available in the GUI?
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    Zimbra RBLs is IP or domain based?

    Under the Admin Console > Global Settings > MTA > DNS Checks > List of RBLs, may I know if it query from the RBLs for IP addresses or domain names? This is because I would like to add...
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    Zimbra Forum having Invalid Redirect URL

    I notice that whenever I login, it will redirect me to nowhere with this message:

    Invalid Redirect URL (http://www.zimbra.com/forums/)

    Can the forum admin updaate the URL? I believe it should...
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    issues with 400GB account?

    We have an archive account where some of the emails sent and received will get bcc into this account thru postfix sender_bcc and recipient_bcc configuration.

    This account is reaching 400GB and...
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    Outdated Mobile Policy

    1. New iPhone and Samsung phones comes with fingerprint login, which is more secured over pin login. However, if we enable "Force pin on device", Zimbra will insist that my Samsung S5 phone to switch...
  11. I actually found the postfix configuration:...

    I actually found the postfix configuration: Postfix Backscatter Howto

    However, I do not want to proceed without Zimbra recommendation as it might break something else.

    Hopefully Zimbra is...
  12. Replies
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    I have done some test and found that when...

    I have done some test and found that when migrating or importing of emails, Zimbra will create a huge log files in /opt/zimbra/redolog/. There is nothing in /opt/zimbra/backup/tmp/mboxmove at all, at...
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    Is it safe to remove files from the following...

    Is it safe to remove files from the following folders/directories since they are using significant storage?

    936456 /opt/zimbra/log

    1941788 /opt/zimbra/redolog

    3851148 /opt/zimbra/zmstat...
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    387

    Is there a way to prevent huge storage...

    Is there a way to prevent huge storage consumption resulted from migrating emails from one account to another? Is there a way to disable tmp file creation or use another tmp folder for moving of huge...
  15. Simon, this look really helpful! Does it works...

    Simon, this look really helpful! Does it works with version 7? What will be the cons of enabling this since such useful feature is disabled by default?
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    I'm using 7.26. Is there any difference in the...

    I'm using 7.26. Is there any difference in the log behaviours for difference versions?
  17. Huge consumption on Bootdisk storage during migration of accounts?

    Whenever we migrate huge amount of emails (either between accounts or to HSM secondary storage etc), we will notice that the SDA1 drive will use over 90% of it's storage. Is this normal?

    What is...
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    log files enquiries

    I got 14GB of log files in /opt/zimbra/log. Is this normal?

    Does the log files get auto delete after a period? If yes, how long is the retention period? 30 days? If not, can I safety delete them...
  19. The image come with our website, so this should...

    The image come with our website, so this should not be the cause.
  20. We have managed to resolve this ourselves before...

    We have managed to resolve this ourselves before Zimbra Support response to us. We notice multiple attempt to login to a particular email account from the Zimbra.log and the spamming begin when this...
  21. I think this is quite a straight forward issue...

    I think this is quite a straight forward issue that is not restricted to a particular version of ZCS where an Zimbra account has been compromised and used by spammer for spamming. What other info is...
  22. spams causing huge deferred email and slow performance

    Our Zimbra server has been flooded with tens of thousands of spams, causing email delivery to be delayed up to 30 min and very slow Zimbra performance.

    Deleting of deferred email does not work and...
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    This look like a really useful feature. Is it...

    This look like a really useful feature. Is it available yet in the latest version 8? It looks like Zimbra is not committing to it. :(
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    Logout immediately upon logging in?

    On a particular Windows Terminal Server 2003 with IE8, users see this message upon logging in under Advanced Mode:

    "You will be signed out in 5 minutes. Save your changes now and sign in again."
    ...
  25. External Sender show internal domain account due to DKIM?

    We receive an email from an external vendor but their email shown is our Zimbra domain account. Even when reply, it also show our domain account. We right-click on this email and show original to...
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