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  1. MarkymarcMarc

    SMTP AUTH relay attack

    Haleon, But if the spam is coming from a clients machine, it will be coming from that ip address internally. I'll do what you say and get back to you, however, my exchange is definately not setup to be a relay. Thanks
  2. MarkymarcMarc

    SMTP AUTH relay attack

    Thnx Haleon. I'll try that and let you know, I've been working offsite the last 2 weeks.
  3. MarkymarcMarc

    SMTP AUTH relay attack

    No, even when I delete the message to send an NDR to the sender, it does nothing. It just sits in the queue. How can I tell what machine it is coming from?
  4. MarkymarcMarc

    SMTP AUTH relay attack

    No mailbox is getting an NDR from these spam messages. They're being auto generated from some machine. I'll try stopping the services and removing the messages and let you know if it worked. Thanks.
  5. MarkymarcMarc

    SMTP AUTH relay attack

    Correct me if I'm wrong but won't Un-selecting that NDR box not provide your local clients with an NDR when they send to an incorrect address. So they won't know if they're mail was delivered incorrectly. After you unchecked this box, did all those spam domains in your queue disappear? I'm...
  6. MarkymarcMarc

    SMTP AUTH relay attack

    I belive my mail server may be hijacked. I have a number of spam messages in my Default SMTP Virtual Server queue waiting to be relayed. Most of them just sit there and when I click on delete with or without an NDR they continue to sit there. I have since frozen everything coming into the...

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