Open Relay Problem?

Discussion in 'Installation/Configuration' started by ZeroEnna, Aug 22, 2014.

  1. ZeroEnna

    ZeroEnna Member

    Hello everyone,

    It seems that I encountered a strange event last night.
    In my Inbox, I found about 30 return messages. All of them are stating (or at least it looks like) they were sent from my server!
    The mail header reads (excerpt):

    Received: from [] by with esmtp (Exim 4.82) envelope from <my-email-adress>
    From: <my-emaikl-adress>
    to: <[email protected]>

    Is my server really in danger or is my mailadress just "abused" as a fake origin?

    Also, is it true (or better: is it legit) that I can EHLO localhost.localdomain and send mails to wherever I want when I telnet localhost 25 ?


  2. till

    till Super Moderator Staff Member ISPConfig Developer

    It is unlikely that the mails ares ent from your server. What you decsribe is the typical spammer tactic to use a third party sender address, in your case your emai address so that yu get the mail bounces. Is the IP you mentioned above the IP of your server?

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