Preventing Postfix backscattering

Posted by Must Do Better on Server Fault See other posts from Server Fault or by Must Do Better
Published on 2011-03-15T13:47:23Z Indexed on 2011/03/16 0:12 UTC
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email

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postfix

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spam-prevention

I am having problems with the Postfix mail server being used for backscattering, I have tried the suggestions in the manual but nothing seems to work. Does anyone know how we can reject any mail from entering the queue if the recipient doesn't match a local recipient rather than send bounce emails? I'm assuming it should be a fairly straight forward change in the configuration files. Just to note I am using Webmin/Virtualmin on the server.

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