Re: [Exim] Blocking sobig.f

>From: Nico De Ranter <nico@???>
>To: David Saez <david@???>
>Cc: Dennis Davis <D.H.Davis@???>, exim-users@???
>Subject: Re: [Exim] Blocking sobig.f
>Date: Wed, 20 Aug 2003 11:13:46 +0200
>On Wed, Aug 20, 2003 at 10:53:44AM +0200, David Saez wrote:

...

>> but it's more stupid to accept any email comming from a on
>> existant email address.
>
>How would you check whether a mail address exists? You can check
>whether the domain exists, but not whether the account exists on
>that domain? Or am I missing something.

No, you aren't. But see the section on callout verification in the
manual (page 254 onwards) for the details. I'd be reluctant to use
callout verification on a busy mail server. The increased load
could be unacceptable.