Content Checking
The Problem
Spam
Are you tired of fighting unwanted and annoying email? Is spam affecting your company's bottom line? If you're like the majority of email users worldwide, you've had some sort of unwanted email invade your inbox. It's email that promotes everything from adult web sites to amazing mortgage deals. Not only are these emails annoying; they can also be quite costly. According to industry experts, spam cost U.S. businesses nearly $9 billion dollars in 2002.
Spam is constantly evolving as spammers employ ever more sophisticated techniques to get their message to you. They use a number of methods for obtaining email addresses. Following are some common methods:
- User registrations at unscrupulous sites
- User newsgroup postings
- User chat sessions
- Spam bots that crawl the web in search of @ signs
- Email lists that can be purchased
- Mailing lists
- Randomly generating name combinations for your domain
- Harvesting all the email addresses on your company's server
So how do you fight this costly invader? You get the right weapon.
The Solution
NetIQ MailMarshal Tools
No single piece of technology is likely to stop all spam, which is why it is important for enterprises to adopt a multi-faceted solution to the spam problem. NetIQ offers an award-winning email scanning solution that enforces your organization's Acceptable Use Policy while protecting against viruses, spam and loss of confidential data. NetIQ MailMarshal offers a suite of products that are fast, effective and easy-to-use, utilizing an extensive array of anti-spam technologies including:
- SpamCensor: Complex analysis of messages using NetIQ's proprietary technology to categorize Spam. MailMarshal updates. SpamCensor automatically, providing an ever-improving barrier against unwanted messages.
- TextCensor: Real time, advanced lexical analysis. Provides weighted keyword analysis and Boolean logic operators to identify phrases or other text characteristics common to Spam. NetIQ Marshal Solutions provides TextCensor scripts, and you can also customize them to meet local needs.
- DNS List Services: Supports the use of external DNS list services that keep track of known Spam sources, such as MAPS (RBL), ORBS and Spamcop.
- Reverse DNS Checks: Uses domain PTR (pointer) record matching in reverse to ensure that domain name and pointer references correctly correspond.
- Anti-Spoofing: Uses specific conditions, such as checking that an internally addressed email source matches known internal IP addresses to determine if an email message has a potentially forged sender address.
- Anti-Relay: Detects and blocks relay attempts (a common Spam technique) and provides anti-relaying exceptions for trusted users.
- Host Blocking: Blocks email from specific email hosts, email servers or entire IP ranges.
- Foreign Language Inputs: Detects foreign language character sets as an additional potential Spam indicator.
- Embedded HTML Detection: Identifies messages that contain minimal text but use an HTML link to retrieve a Web-based image with the Spammer's offer.
- Partner Whitelists: Supports user defined lists of known or trusted email communication partners. Ensures that messages from those partners are never accidentally quarantined as Spam (exempts those email sources from anti-Spam checks).
- Domain or User Blacklists: Blocks email from specified domains (e.g. baddomain.com) or individual email addresses (e.g. harry.spammer@nuisance.com).
- Message Header Analysis: Provides powerful rules-based header matching and header rewriting functions. Allows for sophisticated Regular Expression analysis of email subject lines.
- Anti-Spam Reporting: Supplies comprehensive reporting and classification options to help you track Spam, monitor the effectiveness of MailMarshal and optimise your security.
Software Development
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