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How does spam filtering work?

VUmailguard FAQ @ ITS: Information Technology Services - Van...
Proofpoint MLX technology examines over 50,000 mail attributes to assign a numeric probability that a particular piece of email is spam. It also includes machine learning algorithms that predict new spam mutations, and is constantly updated to keep up with the ever-changing methods of spammers.
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Quexion EnterpriseMail, Business Email Service FAQ
All email received by our servers is scanned using a wide range of heuristics, proprietary rules, and advanced Bayesian analysis. Each user can set the sensitivity of their own spam filter based on their preference and they can check email identified as Junk Mail whenever they want to.
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What do you use for Spam and Virus filtering (AS/AV), and how well does it work?

com | Zimbra 5 FAQ's | Hosted, Dedicated Servers & Profe...
We're using dedicated, load-balanced versions of Defender MX and its extension Barricade, running from within our hosted blade-server environment. For more detailed information about the software, please visit http://www.fsl.com/ The 01.com AS/AV system provides a secure, separate web site for clients to access using their zimbra email address and password.
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How well does your spam filtering service work?

About Advanced Network Solutions
Our focus is to block the most spam while never blocking legitimate business email. Our customers tell us we block 90 to 95 percent of their unwanted email without blocking legitimate messages. Customers who participate in our spam filtering process and submit spam messages to us typically see a higher percentage of blocked spam. White listing is simply a workaround for ineffective filtering.
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How does your spam filtering technology work?

Resume Posting Help | Job Searching Help
Posting your email address on the Internet can sometimes give rise to unwanted Spam. To eliminate this problem, your account was set up with a special email address @westpost.net and our Spam Prevention feature. Any email sent to your westpost.net address will automatically go through our Spam Filtering servers before you receive it. While no spam filtering technique is 100% foolproof, our service eliminates most non job-search related email.
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How do I set up spam filtering?

TNS: FAQs
In many cases, you can configure your e-mail client to filter spam based on the subject line of the e-mail message. Messages that the mail server considered to be spam will be marked {SPAM} in the subject line. For assistance, contact the desktop support staff in your department or the TNS Help Desk at 4-5261. If you read e-mail on rohan.sdsu.edu, see configuration details at http://www-rohan.sdsu.edu/help/spam.
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How Does the Filtering Work?

TECHNICAL PAGE
ClearSail's filtering is Server Based, not computer software; therefore, there is no need for our customers to continuously update their software. ClearSail searches the Internet everyday and adds to our website blocking list. Thousands of websites are located and filtered each day.
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How does the campus spam filtering service work?

IET : FAQ
UC Davis employs several different methods for identifying spam. These methods work together to assign scores to potential spam email messages. The scores assigned are based on lists of characteristics of known spam messages. For example, an email containing one or more images might score 2 points; a list of links might score 1 point; a subject line containing characters other than letters and numbers might score 1 point; and a message sent to five thousand people might score 5 points.
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How does 123mail's spam filtering system work?

mail.net: Reliable email solutions - FAQs
mail's Spam Filtering service uses five Spam filtering layers in combination to determine whether or not a message is Spam. 123mail is able to filter all text and html components of a message. These five methods are Heuristics (content based rules), Automatic Fingerprinting (frequency based), Bayesian Classification (advanced statistical analysis), Spam Black-lists (known spammer, IP blocks, experiential), and Spam White-lists.
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myDurango.net
We do some filtering of e-mail, and our methods will change from time to time as we adjust to the new types of spam and viruses out there. Our goal is to weed out the worst of it while allowing legitimate mail to get through. It is not likely that we will be able to keep all unwanted mail from reaching you, so please be careful when opening unsolicited e-mail. You can minimize spam by only giving your e-mail address to trusted friends and businesses.
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How does web filtering work?

Help with SCORE - Frequently Asked Questions
One of several web filtering policies could be in place at your school. These default policies have been devised by the local authority and are in place with the agreement of each head teacher: Each head teacher can request a policy, or set of policies, specific to their school based on their needs and managed by Atomwide through the school’s IP range(s). If a school has not asked for a specific policy or one of the above, it will be working under the primary default policy.
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How does virus filtering work?

Quexion EnterpriseMail, Business Email Service FAQ
All email received by our EnterpriseMail servers is scanned for viruses. Messages with viruses are cleaned before they reach your Inbox. Today, over 90% of all computer viruses come through email so it is important to protect yourself. Our virus definitions are updated continuously, so we have information on the most recent viruses as soon as it is released. EnterpriseMail works with any email capable device which supports POP, IMAP, or SMTP.
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How does family filtering work?

skyQ Internet Services
You can optionally choose to restrict access to objectionable web pages on the internet. These sites have been identified as having objectionable content by a third party. If you choose this option you will be prevented from accessing known sites that are generally considered inappropriate for children. This list is extremely comprehensive, having been compiled over many years by a third party that views every site with "human" eyes before adding a URL to the list.
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How does the filtering service work?

Spam Blocker and Spam Filtering FAQ - Online Spam Solutions
A small change is made to your company's Domain Name Server (DNS) settings that tells the internet's mail servers to deliver your company's mail to our network of servers, so your mail flows through our filtering network before being delivered to your current mail server. (see How it works) None. They're just different names for the same thing. This type of service is also called a Gateway Spam Service.
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What about SPAM Filtering and Mail Services?

Virtuoso FAQs
Virtuoso enables you to combine the functionality of a mail system and database so that you can custom develop spam filters or customize Virtuoso (via its server extensions kit) to work with 3rd party Spam filter tools. Virtuoso can enable Spam filtering to occur immediately after mails are deposited in your mailbox, and prior to POP3 mail retrieval.
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How do 123mail's Spam filtering and Virus blocking services work?

mail.net: Reliable email solutions - FAQs
After 123mail sets up a customer, the customer simply points the MX portion of their DNS record at 123mail's servers. The setup process is very easy and quick. From then on, 123mail delivers mail back to the customers mail server in real time after the email has been filtered for spam and viruses.
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Does the new server have spam filtering like the old one?

Society for Creative Anachronism, Inc.
Yes, it does. In fact, we've upgraded to a new version of the SpamAssassin software. It isn't fully tuned yet; we hope to improve its performance over time. Filtering spam is an iterative process. You will soon have the option of personalizing your spam filtering settings as well.
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How does subthread filtering work?

Agent Newsreader FAQ
Subthread filtering in Agent 4 is intended to enable you to Ignore subthreads while leaving the rest of the thread unaffected. Example: You are interested in a topic, but one branch, or subthread, has wandered off into something you're not interested in or was invaded by a "troll", so you have no interest in reading responses within that part of the main thread. So, just press the i key to Ignore that message and Agent will also Ignore all responses to that message.
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How does the Anti-Virus filtering work?

Business Broadband
The Anti-Virus detection and filtration software acts server-side, reducing considerably the risk of virus attacks on the your PC. It analyses incoming mail so that you don't risk opening infected messages. Only once they are checked and, if necessary, cleaned, are they sent to your mailbox.
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How does Source port filtering work?

ProCurve Networking by HP - Support - Häufig gestellte ...
When you create a source-port filter, the switch automatically sets the filter to forward traffic from the designated source to all destinations for which you do not specifically configure a "drop" action. Thus, it is not necessary to configure a source-port filter for traffic you want the switch to forward unless the filter was previously configured to drop the desired traffic.
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How do I enable spam filtering?

OpenBand - Online Help
Connect to Web-Mail interface via http://webmail.smartneighborhood.net or http://webmail.glassmile.net, or from OpenBand Online Customer Care Account at: https://support.openband.net Then click on the "Options" link located in the vertical navigation panel on the left side of the page. Deliver Spam to Junk Folder (Spam gets deleted after 7 days): Spam emails will be delivered to "Junk E-mail" folder. Please note that wanted messages are occasionally identified as junk mail.
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Do you provide spam filtering?

Email FAQ
Yes. Hostway's CleanMail and CleanMail Plus provide spam and virus filtering that helps keep your email spam- and virus-free. All incoming email messages are automatically scanned to detect for viruses and to determine if the message meets specially defined "spam criteria.
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