Re: [exim] Brain Teaser - how would you do this?

Tony Finch wrote:
> On Mon, 3 Apr 2006, Marc Perkel wrote:
>
>
>> OK - here's what I want to do. I want to forward a copy of selected email to
>> another email address, but only if the email address that I want to forward to
>> is a valid working email address. So - I need to do a callout and check if the
>> email address is valid before I forward a copy.
>>
>
> require verify = recipient/callout
>
> Tony.
>

Maybe I need to explain more of the details. I run a front end spam
filtering service. Email comes in - I process it and the good email is
forwarded to the end user.

But - some of my customers are asking to get a copy of the spam I'm
bouncing/black holing. So what I want to do is if I detect spam then I
want to forward a copy of it to another email address, but only if I can
do a forward callout and verify the address exists. So the email address
I need to verify isn't either the sender or the recipient. I need to
verify and arbetrary address that I generate to see if it exists and if
it does then forward a copy of the spam there.