Content filters on public mail i.e. gmail, yahoo etc

Question

is there a way to create content policies on web security appliances on information sent on public mails( gmail yahoo ) or IMs?
it might sound stupid as you cannot control the mail server so filter what can be sent out or not but on the other hand you can monitor the web traffic
:-)

Answer 1

You might be referring to our DLP (Data Loss Prevention) seen on 6.0 and above. Below is a clip from our User Guide, you can search for that section to see if it fits your needs.
DATA SECURITY AND EXTERNAL DLP POLICIES OVERVIEW
In the Information Age, your organization’s data is one of its most prized possessions. Your
organization spends a lot of money making data available to your employees, customers, and
partners. Data is always on the move by traveling over the web and email. This increased
access poses challenges for information security professionals to figure out how to prevent the
malicious, accidental, or unintentional loss of sensitive and proprietary information.
The IronPort Web Security appliance secures your data by providing the following
capabilities:
• IronPort Data Security Filters. The IronPort Data Security Filters on the Web Security
appliance evaluate data leaving the network over HTTP, HTTPS, and FTP to control what
data goes where and how and by whom.
• Third party data loss prevention (DLP) integration. The Web Security appliance integrates
with leading third party content-aware DLP systems that identify and protect sensitive
data. The Web Proxy uses the Internet Content Adaptation Protocol (ICAP) which is a
lightweight HTTP based protocol that allows proxy servers to offload content scanning to
external systems. By offloading the content scanning to dedicated external systems, the
Web Proxy can take advantage of the deep content scanning in other products while
being free to perform other Web Proxy functions with minimal performance impact.