Slightly OT: Greylisting success or failure stories?
Aleksandar Milivojevic
amilivojevic at pbl.ca
Fri Feb 4 14:29:14 UTC 2005
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
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