Security Basics: Re: Blocking traffic by Country to reduce spam

[hellkyng () gmail com]

Some of the companies I've worked for have tried this. If you are a small company it seems to work very well. However 
even companies of medium size tend to receive some number of emails from foreign countries. Invariably some foreign 
client gets blocked and is none to happy. 

To summarize I've seen it work and I've seen it fail. I might recommend a less broad approach such as blocking blocks 
foreign countries known for spamming. 
Good Luck!

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