Spam Problem

[Mike Masse]

dw at lker.co.uk wrote:
>
>
>  
>
> We are being plagued with emails that are sent with the address of our 
> users, but not from our mailserver.
>
> Basically an email is sent to the user fred at domain from fred at domain.
>
If you can use milters, mailfromd easily allows you to create arbitrary 
rules such as: reject any email that says it is from *@domain, but is 
coming from an smtp server not in *@domain.  

Mike