Results 1 to 4 of 4

Thread: External Domain Account in Zimbra Sender list?

  1. #1
    bhwong is offline Outstanding Member
    Join Date
    Feb 2009
    Location
    Singapore
    Posts
    500
    Rep Power
    7

    Default External Domain Account in Zimbra Sender list?

    I notice that in Zimbra mail queues, there are senders who do not have any account in Zimbra at all. Why is it that they can use our Zimbra to send out email? Is this normal?

  2. #2
    y@w's Avatar
    y@w
    y@w is offline Moderator
    Join Date
    Jan 2008
    Posts
    658
    Rep Power
    8

    Default

    There's a few things that can allow that.. Users can add personas to their accounts right in the web client with whatever address they want if the checkbox is checked in the admin console for their user. They can also do the same from their mail clients. There's also the possibility that some server in your trusted networks is using it as a relay. (there are plenty more possibilities)

    Most importantly, you'll want to make sure you're not an open relay to the world. I'd recommend this tool.

  3. #3
    bhwong is offline Outstanding Member
    Join Date
    Feb 2009
    Location
    Singapore
    Posts
    500
    Rep Power
    7

    Default

    Our Zimbra is not an open relay and the usage of personas is unlikely because these appears to be some valid accounts from external parties:

    xxxmagazine@gmail.com
    xxx@luxasia.com
    xxx@mailnaritlaw.com

  4. #4
    phoenix is offline Zimbra Consultant & Moderator
    Join Date
    Sep 2005
    Location
    Vannes, France
    Posts
    23,585
    Rep Power
    57

    Default

    Quote Originally Posted by bhwong View Post
    Our Zimbra is not an open relay and the usage of personas is unlikely because these appears to be some valid accounts from external parties:
    Feel free to search the internet for details of 'backscatter' or 'NDR' spam or perhaps some of the many forum threads or wiki articles that detail what you can do to limit this problem.'
    Regards


    Bill


    Acompli: A new adventure for Co-Founder KevinH.

Thread Information

Users Browsing this Thread

There are currently 1 users browsing this thread. (0 members and 1 guests)

Similar Threads

  1. Replies: 15
    Last Post: 11-24-2009, 08:46 AM
  2. Replies: 12
    Last Post: 02-25-2008, 07:28 PM
  3. Big Fubar on 5 FOSS GA Upgrade
    By uxbod in forum Administrators
    Replies: 24
    Last Post: 01-21-2008, 03:37 AM
  4. Unable to start tomcat
    By chanck in forum Administrators
    Replies: 11
    Last Post: 06-11-2006, 12:58 AM
  5. 3.1 on FC4 problems
    By cohnhead in forum Installation
    Replies: 8
    Last Post: 05-26-2006, 11:16 AM

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •