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  • (01. January 2010., 10:27:49)

Author Topic: NoSpamToday!  (Read 4534 times)

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    • - Samker's Computer Forum
« on: 12. May 2007., 22:32:28 »
NoSpamToday! for Workstations - Features and Benefits

NoSpamToday! for Workstations blocks spam before it gets to your email client. It works by accepting POP3 connections on port 110 of your computer's loopback interface, and forwarding all requests to your ISP's POP3 server.

The technical details of how NoSpamToday! works: Your mail client initiates a POP3 connection to your ISP (internet service provider), to retrieve all the mail you haven't seen yet. NoSpamToday! for Workstations positions itself in between, mails retrieved from your ISP are passed through the built-in attachment blocker, a virus checker (optional) and the award-winning SpamAssassin™. filter. Of course, all you really need to know is that spam won't get through to you!

All mail messages retrieved are first scanned by the built-in attachment blocker. It comes preconfigured with a list of potential virus vectors to be blocked, but you can of course change this list according to your needs.
In a second step, messages are checked for viruses by 3rd party tools such as Clam Anti Virus and F-Prot Anti Virus. NoSpamToday!'s built-in support for many different virus checkers makes it easy to set up Anti Virus protection.
Finally, messages are checked for spam using the award-winning SpamAssassin™ engine.
Fight Spam with Award-Winning SpamAssassin!

SpamAssassin combines the most effective and advanced anti spam technologies into one powerful solution that accurately determines if a message is or is not spam. It uses a comprehensive list of heuristic rules and checks to score messages. This filtering is completely automated, and spam-scoring thresholds are customizable. It also includes Bayesian filtering and offers many additional features, such as complete spam message reporting, header reporting and much more.
SpamAssassin uses the following tests and techniques to identify spam:
Email Header Analysis:
The mail headers are scanned for some small inconsistencies that can give away forgeries: A mail date in the past or in the future, forged message IDs, and the like.
Keyword Checking and Text Analysis:
The mail body is scanned for typical spam mail content, such as spam keywords, capitalized letters, or invitations to buy or click something.
Bayesian Filtering:
Bayesian filtering statistically calculates the probability that an inbound message is spam. Spam mails can be trained, so that similar mails are more likely to be identified as spam in the future.
Realtime DNS Blacklist (DNSBL, RBL) Checking:
Queries to DNSBL servers are used, e.g. to see if a mail has been submitted from a known open mail relay or notorious spam sender.
Multiple SURBL (Spam URI Realtime Blocklist) Checking:
Spammers want you to click on hyperlinks referring to their sites, so a lookup in a database of known spamadvertised sites has proven to be highly effective in identifying spam mails. Similar to Realtime DNS Blacklists, SURBL (Spam URI Realtime Block Lists) checks will block messages that contain URIs in the message body that link to known spam hosts.
SPF (Sender Policy Framework) Support:
SPF is an emerging standard to detect forged "From" addresses in emails.
Automatic Whitelist Management:
SpamAssassin's Auto-Whitelist (AWL) tracks scores of regular correspondents to automatically identify legitimate sender addresses.
White and Black Lists:
White and Black lists can be used to configure which email addresses are permitted or denied.

The result of all these tests is added up to form a spam score. A mail is considered spam if the score exceeds a configurable threshold.

In the typical configuration, the subject of mail identified as spam is modified to flag it as spam mail, and a SpamAssassin™ report is added to the message. Now it is up to your mail client software (Outlook, Eudora etc,) to decide what to do. You can automatically delete spam mails, or move spam mails to a quarantine folder.

The outgoing mail path is left as is, mail is still directly delivered to your provider's SMTP server.
Virus Filtering with NoSpamToday!

NoSpamToday! has an integrated attachment blocker, and has built-in support for many third-party virus checkers, such as Clam AV, F-Prot Anti Virus, or McAfee VirusScan just to name a few.
Blocking malicious attachments

Most worms and viruses are spread by attachments. Getting rid of messages containing potentially malicious attachments before even starting virus checkers or spam filters can be very helpful to reduce system load.
Virus Protection

NoSpamToday! can be configured to run a third party virus checker before a mail is accepted. Virus mails are rejected and deleted.

Every virus checker that offers a command line interface can be integrated into NoSpamToday!.


Samker's Computer Forum -

« on: 12. May 2007., 22:32:28 »


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Re: NoSpamToday!
« Reply #1 on: 12. March 2010., 09:28:45 »
thanks a lot

Samker's Computer Forum -

Re: NoSpamToday!
« Reply #1 on: 12. March 2010., 09:28:45 »


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