We need a country white list that will apply to the domains sending us emails
Currently most spam arrives from domains which include country identifiers that even in a hundred years the user will never ever expect to communicate with.
Please allow a yahoo account user:
(1) the option to activate a email country white list
(2) limit the white list entries to twenty countries per account.
Very few of us can write and read proficiently in more than ten languages. A maximum of twenty countries from which the user is prepared to accept emails should be more than generous.
To be clear the effect of this functionality must be to reject any email sent from a domain which includes a country identifier that is not specified in the whitelist. (i.e. don't put it in my Spam folder but simply automatically delete the email to save my time and reduce the waste of your resources)