Is there any way of blocking unknown contacts?

[Evan Platt]

Step666 wrote:
> "You will want to use "Allow only the users below" instead."
>
> Er, ok.
> That'll do what I want then, will it?
>   

Well, it will only allow people on the list you specify to contact you. 
Is that what you want?

> And, apologies for the dumb questions but where is that option? Preferences,
> part of the account settings, where?
>   
As I said in my original message,  Tools, Privacy.