How to prevent disaster expansion

[shenglinn]

I use EFA as a Mail gateway,
If some guy's email has been hacked and hacker use this email account to send huge amount of spam mail from inner trust mail server,
Is any way to prevent disaster expansion?

[pdwalker]

1/ Find out how the guys email was hacked and prevent it from happening again.

2/ Make sure that your EFA box scans outgoing mail for spam, and if it detect spam, to stop it from going out.