Slightly OT: Greylisting success or failure stories?

[Aleksandar Milivojevic]

David Cary Hart wrote:
> BTW, rbldnsd uses considerably less memory than NTPD. Blocking China and
> Korea is an extremely effective technique. If we ever get a client in
> the PRC, I'll be sure to whitelist them -;)

Some people tend to have Canada in the list too.  For whatever reason. 
One person added entire .ca because he got single spam from Canadian 
address (talk about trigger happy).

Anyhow, in todays world, blocking entire countries sucks.  It kills 
mobility.  If somebody who's on vacation or bussiness trip in one of 
those countries sends email to one of your users, it'll get blocked. 
Now, you can say that possibility of that is low, but you never know 
when you'll get bitten.  If you are doing such limitations, why stop 
half-way, why not create a list of countries you want to communicate 
with, and ban all the rest?  Because it is bad idea?

-- 
Aleksandar Milivojevic <amilivojevic at pbl.ca>    Pollard Banknote Limited
Systems Administrator                           1499 Buffalo Place
Tel: (204) 474-2323 ext 276                     Winnipeg, MB  R3T 1L7