mailscanner rules order?

[Chris Hardy]

Can someone tell me / point me in the direction of the order that 
mailscanner's rules are implemented?

The reason i ask is that we have an email address in the whitelist, but 
it still won't let us receive attachments from them.

So is it something like: Anti-virus, dodgey filenames, anti-spam ? Where 
does the whitelist fit in?

Thanks for help / advice.

chris

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