Re: [exim] Estimating spam deliveries

Chris Edwards wrote:
> On Mon, 15 Oct 2007, Ian Eiloart wrote:
>
> | Does anyone know a good way of estimating how much spam is being delivered
> | to mailboxes?
>
> Ask a sample of users to count or estimate how many spams they get
> e.g per week ?
>

The hard part here is to detect false assumptions from users. For example, some
will say that a mail is a spam while it is not, it is just a mailing list from a
shop where they bought a product and clicked on the "I want to receive your
mailings". The reverse is also possible (think phishing). As strange as it may
sound, "un-spam-educated" users are often less accurate than automated spam filters.

> Then for each user in the sample, you know how many mails are accepted and
> how many are rejected, hence you can calculate stuff like what percentage
> of all spam your system is rejecting.
>
> c
>

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