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Spam and virus protection

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  • tarpitting

    Tarpitting is the practice of slowing the transmission of e-mail messages sent in bulk, as a means of thwarting spammers. The intent is to maintain a high quality of service for legitimate users while making the sending process impractical for spamme... 

  • throttled data transfer

    Throttled data transfer, also known as data transfer throttling or lean data transfer, is the deliberate regulation of the data transfer rate in a communications system... (Continued) 

  • backscatter spam

    Backscatter spam, also called misdirected bounce spam or NDR spam, is a strategy for sending unsolicited email messages that takes advantage of the fact that certain types of mail transfer agent (MTA) programs return the entire message to the sender ... 

  • Vouch by Reference (VBR)

    Vouch By Reference (VBR) is a protocol for adding third-party certification to email. The first part of the protocol requires the sender to add information to their email header by creating a field called VBR-Info. 

  • KnujOn

    KnujOn is an interactive Web-based spam reporting service. Through persistent policy enforcement, KnujOn reduces the value of unsolicited bulk email (UBE) by both eliminating transaction platforms and increasing the operational costs for spammers. (C... 

  • greylist (or graylist)

    A greylist (also spelled graylist) is a list of e-mail addresses or domain names that a spam filter uses to identify suspected spam. If a message arrives from an address or domain on the list, it will be quarantined and then delivered to the subscrib... 

  • spam confidence level (SCL)

    Spam confidence level (SCL) is a numerical value indicating the likelihood that an incoming email message is spam. SCL is a component of the Microsoft Exchange spam filter... (Continued) 

  • image spam

    Image spam is junk email that replaces text with images as a means of fooling spam filters. Image delivery works by embedding code in an HTML message that links to an image file on the Web... (Continued) 

  • hash buster

    A hash buster is a program that generates a string of text for insertion in a spam message so that, to a spam filter, the e-mail appears to be a different message each time it is sent. 

  • teergrube

    A teergrube (German for tar pit) is a computer server set up to be intentionally slow, as a trap for spammers using address harvesting programs. 

  • See More: Definitions on Spam and virus protection
About Spam and virus protection

Want to block spam and stop viruses before they reach your Exchange servers and Microsoft Outlook email clients? Find the spam and virus protection software tools, tips and tutorials you need here.