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Somehow my mailserver is sending thousands of mails to people in another country!!!! I don't know where to start looking!!! How somebody managed to use my mail server to send all those messages?? This has been occurring for the last 5 months!!! please help!

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Check your 'SMTP Server' settings. Make sure that you don't have 'Open Relay' turned on. Best to use 'Users authenticated through SMTP for outgoing mail'.

If you are already set-up that way, then you'll want to see if one of the users accounts has been hijacked and is being used to send spam through their account.

Certified Hosted Kerio Connect Solutions
Kerio Mail Boxes / Dedicated Kerio Servers / Managed Kerio Cloud

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  1. Stop the mail server
  2. Delete the queue directory
  3. Check your relay options, they should only allow authenticated users to relay
  4. Check for weak passwords, someone might have guessed a password and is now abusing the mail account

Dexion AG - The Blackberry Specialists in Switzerland
My IT Indy

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We had that happen on one of our servers. One client got their password guessed and that was all it took.

My IT Indy
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