How to filter/drop specific messages?

Is it possible to configure message filtering based on message content?
For example: I would like to drop messages with word "password" without delivery.
Thanks.

With mod_shit (almost)

I once wrote mod_shit, mostly as a joke, but it actually works, replacing bad words with asterisks. Modifying it to drop such messages wouldn't be hard.

mod_shit

thanks :)
I'll try it.

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