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Thread: Please help, strange error

  1. #1
    Srdjan is offline New Member
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    Default Please help, strange error

    I was hapy Zimbra user for three years until few hours ago, now when i try to send email i get following error:
    This is the mail system at host mx3.elite.hr.

    I'm sorry to have to inform you that your message could not
    be delivered to one or more recipients. It's attached below.

    For further assistance, please send mail to postmaster.

    If you do so, please include this problem report. You can
    delete your own text from the attached returned message.

    The mail system

    <srdjankadric@gmail.com>: host 195.29.150.5[195.29.150.5] said: 550 5.7.1
    <unknown[195.29.121.38]>: Client host rejected: Blocked because of
    spam/virus. Please contact abuse@t-com.hr for more info. (in reply to RCPT
    TO command)



    Reporting-MTA: dns; mx3.elite.hr
    X-Postfix-Queue-ID: BF54524335B0C
    X-Postfix-Sender: rfc822; admin@elite.hr
    Arrival-Date: Thu, 25 Jul 2013 23:24:02 +0200 (CEST)

    Final-Recipient: rfc822; srdjankadric@gmail.com
    Original-Recipient: rfc822;srdjankadric@gmail.com
    Action: failed
    Status: 5.7.1
    Remote-MTA: dns; 195.29.150.5
    Diagnostic-Code: smtp; 550 5.7.1 <unknown[195.29.121.38]>: Client host
    rejected: Blocked because of spam/virus. Please contact abuse@t-com.hr for
    more info.

    Is my server on black list??

  2. #2
    Raunaq's Avatar
    Raunaq is offline Zimbra Employee
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    Default

    You relaying mails or something because the final recipients are gmail users and elite.hr is blocking the emails.Is the elite.hr email server is the server from which you are relaying your mails?

  3. #3
    Srdjan is offline New Member
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    Thank You for your help, I somehow managed to solve the problem, you see one of the accounts was hacked (still don't know how) and was generating a lot of emails, that got stuck'd, as soon as I locked the problematic account,deleted all emails everything started to work fine again, but i had to make a few phone calls to local ISP because they blocked our port 25.
    Still... i have to find how someone managed hack account, even the sender name was changed....

  4. #4
    phoenix is online now Zimbra Consultant & Moderator
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    Default

    Quote Originally Posted by Srdjan View Post
    Still... i have to find how someone managed hack account, even the sender name was changed....
    You'll not necessarily find out how they did it but what you should do is enforce strong passwords for you accounts, look at that option in the Admin UI. You could also look into using policyd to limit what can be sent through/from your server, you'll find details of that in the wiki.
    Regards


    Bill


    Acompli: A new adventure for Co-Founder KevinH.

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