Improving enterprise email security: Systems and tips

Email and Messaging Threats (spam, phishing, instant messaging)

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  • Joe job

    A Joe job is an e-mail spoofing exploit in which someone sends out huge volumes of spam that appear to be from someone other than the actual source.  Definition

  • challenge-response system

    A challenge-response system is a program that replies to an e-mail message from an unknown sender by subjecting the sender to a test (called a CAPTCHA) designed to differentiate humans from automated senders.  Definition

  • email spoofing

    E-mail spoofing is the forgery of an e-mail header so that the message appears to have originated from someone or somewhere other than the actual source.  Definition

  • phishing

    Phishing is an e-mail fraud method in which the perpetrator sends out legitimate-looking email in an attempt to gather personal and financial information from recipients.  Definition

  • Sender Policy Framework (SPF)

    Sender Policy Framework (SPF) is an anti-spam approach in which the Internet domain of an e-mail sender can be authenticated for that sender, thereby discouraging spam mailers, who routinely disguise the origin of their e-mail, a practice known as e-...  Definition

  • cloaking

    Cloaking is the masking of the sender's name and address in an e-mail note or distribution.  Definition

  • anonymous email

    Anonymous e-mail is e-mail that has been directed to a recipient through a third-party server that does not identify the originator of the message.  Definition

  • CAPTCHA (Completely Automated Public Turing Test to tell Computers and Humans Apart)

    A CAPTCHA (Completely Automated Public Turing test to tell Computers and Humans Apart) is a test, used with challenge-response systems, that's designed to differentiate humans from automated senders. (Continued)  Definition

  • crimeware

    Crimeware is any computer program or set of programs designed expressly to facilitate illegal activity online.  Definition

  • Register of Known Spam Operations (ROKSO)

    The Register of Known Spam Operations (ROKSO) is a list of over 500 professional spammers that is maintained by the Spamhaus Project, an organization dedicated to identifying and exposing spam operators.  Definition

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