E-mail solution becomes unusable if junk email is not filtered properly. The sheer volume of junk messages can crowd out legitimate mail and cause employees to waste time manually filtering through messages. A side effect of some junk email-filtering solutions are false positives, or email that is incorrectly identified as spam, causing legitimate messages to be discarded. When this occurs, the organization must sift through the junk email looking for legitimate messages or lower the level of filtering, allowing more potential junk messages to go to users and making the user responsible for determining whether email is spam. Unsolicited email is also more likely to be malicious and include embedded attacks. Criminal organizations are using attacks in email as an effective and cheap way to attack user machines. An example of an attack contained within email is malware that attempts to infect the host machine or that offers users counterfeit URLs (phishing) to trick them into going to a
http://www.ebrahma.com/2013/09/securing-e-mails-with-cisco-email-security-appliance/Labels: eBrahma