HTTP email security

From: hank (
Date: 05/04/02

From: "hank" <>
Date: Fri, 3 May 2002 17:08:09 -0700

What's the best way to lock down users from using HTTP emai accounts like
Hotmail, yahoo, etc?

I was thinking of GPO settings with a Restriction set for *,
*,, and

Or I should apply these filters on the firewall instead? what do you guys
think? is there a better way? Please help... thanks.

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