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Please how postfix is used to send out SPAM?
https://forum.linode.com/viewtopic.php?f=11&t=11377
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Author:  postcd [ Thu Oct 23, 2014 12:53 pm ]
Post subject:  Please how postfix is used to send out SPAM?

Please kindly anyone help me discover where is the hole in postfix / system?
After i installed zPanel on plain linux OS CentOS, and some days passed i found /var/spool/postfix/deferred folder is growing
Here are two example emails headers:
http://pastebin.com/ZXnk4q42

Can please anyone tell from headers on how i need to fix the hole? I dont want to ban IP or such, but prevent anyone can abuse it..

Thank you

Author:  Main Street James [ Sat Oct 25, 2014 8:45 am ]
Post subject:  Re: Please how postfix is used to send out SPAM?

The first thing I would test for is an open relay. We can't test it for you because you provided no information identifying your domain, etc.

Author:  postcd [ Sun Oct 26, 2014 7:21 am ]
Post subject:  Re: Please how postfix is used to send out SPAM?

Thanks, no it is nto an open relay and open resolver test is also negative. i tried multiple online testers..

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