Re: [exim] Callout verification for forwarding addresses?

On 29 Sep 2007, at 16:26, Dean Brooks wrote:

> On Sat, Sep 29, 2007 at 02:07:11PM +0200, elvis_the_king@??? wrote:
>
>> [...]
>> A simple recipient callout does not suffice if the address we
>> forward to is valid but the server rejects the mail based on content.
>>
>> Thanks for sharing your thoughts :)
>
> Hmm, well, my opinion is that callouts should only be made to other
> mail systems that you or your company owns. If you will be doing
> callouts to other mail servers, you should limit it only to systems
> that you have a prior agreement with and that have added you to their
> whitelists.

if you read the OP question with attention you will notice that he
wasn't really asking about callouts... Or better, first he asked
about callouts but then he noticed that he would like to test if the
whole e-mail will be accepted before giving the response to DATA. The
only problem is that his whole thinking is incorrect, as there is no
way to give a response specific to one recipient at that stage.
One solution would be to simply not bouncing on failed forwarding. I
think setting errors_to in the forwarding router to point to the
local email administrator will do that.

Giuliano