We have just activated the anti-spam on the SBG/GRA/BHS zone.
With RBX, this enables us to detect 99% of spam that our
customers send over the internet.
In RBX, we have 1400 IPs with the SMTP network exits
blocked. In SBG/GRA/BHS, we are starting to block
port 25 for the first spammers in these 3 DC zones.
At the same time, we have increased the handling capacity
in order to detect up to 1000 spam emails/second, and so
can we analyse all outgoing emails from our DCs.
Update(s): Date: 2013-10-25 12:27:32 UTC
And here's the result :)