[vox-tech] spam current events

[Ryan]

On Thursday 31 August 2006 03:48 pm, Alex Mandel 
tech_dev-at-wildintellect.com |lugod| wrote:
> I used a program once, oddly enough it seems like a spammers tool,
> called worldcast. It allowed my to verify that addresses on my list were
> valid through a multi step check which included hitting the email server
> and confirming the account existed.
>
> Is there someway to turn this concept into filtering an email based on
> whether the sender validated as a real email address that exists on a
> real domain.
>
> It seems like a lot of spam spoofs who it's from or in fact has
> addresses that really don't exist at all.
>
> I admit I may be a little naive in how this all works, just poking around.
> Alex

Exim can do this, and calls it callout verification.  It's not really advised 
for use, though, and some email providers will blacklist you for using it 
(AOL, probably others)

-- 
Ryan Castellucci - http://ryanc.org/
GPG Key: http://ryanc.org/files/publickey.asc