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For maximum protection against malicious and unwanted e-mail, CipherTrust recommends using Edge in conjunction with its IronMail
gateway appliance, allowing the edge product to block known threats and therefore relieve the IronMail appliance from having
to scan so many messages.
While this layered approach may sound like overkill, one analyst says such a set up can be beneficial, particularly to large
corporations that receive huge amounts of e-mail.
“If you have to process for viruses, spam, etc., using actual content filtering, it’s extremely CPU-intensive,” says Michael
Osterman, president of Osterman Research. “If you can just determine at the very beginning that you know the e-mail is from
an untrusted source, you can just drop the [IP] connection and eliminate all that bandwidth and storage.”
Other enhancements to Edge 2.0 include LDAP verification, where the appliance compares recipient names on inbound e-mail messages
with the enterprise LDAP directory and drops those addressed to users who don’t exist, say officials. This version is also
able to store inbound messages, in case of a failure in the corporate mail system, until the connection to the mail server
is restored.
CipherTrust is slated to become part of Secure Computing on Sept. 8, once the announced acquisition plans are approved.
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