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Hostspring is pleased to offer our customers state-of-the-art Spam/Virus removal software. Our solution employs six different antiSpam systems (MailScanner, SpamAssassin, ClamAV, DCC, Vipuls Razor and user definable rules-based Spam filtering). The use of these various systems is designed to help you eliminate and remove up-to 98% of junk mail and viruses from your inbox.
How does it work?
Our Spam Filter solution works to minimize the damage Spam does to your business. The Spam filter system scans every email sent to your account verifying the legitimacy of the email and determining the likelihood of the email containing Spam. The system is deployed and administered on the mail server and managed by us ensuring there is no administrative overhead for your organisation. The anti Spam application works to identify Spam emails before they reach your email box. Emails are scanned using our internal Spam detection and filtering network and SpamAssassin a server based mail filtering system. Furthermore, an additional layer of Spam protection can be utilized from enabling the custom Spam filters available from your control panel. This multi-pronged approach ensures maximum efficiency in reducing Spam to your email box and can reduce Spam levels by up-to 98%. Depending on your specific requirements the Spam filter can manage email identified as Spam in one of two ways:
- Automatic Deletion
Once a particular email has been identified as Spam it can automatically be deleted ensuring your staff are never inconvenienced by Spam in the workplace. The emails are erased by the mail server and are never delivered to the end user dramatically reducing the presence of Spam in your mail box.
- Automatic Tagging and Filtering
The filtering application can be set to automatically tag suspected Spam emails, once tagged the email will be delivered to the end user where the Email Program (such as Microsoft Outlook or Outlook Express) will identify the tag and move the email to your junk folder. In this way emails are never lost but are simply relocated to the users junk folder. The user is then able to browse through the folder on a daily or weekly basis retrieving any emails that maybe of interest or use.
Benefits of MailScanner
- Fully managed Spam prevention system, minimising administrative overhead for your organisation
- Constant checks for consistent spammers against an independent database of identified spammers
- Scans email at the mail server, therefore emails identified as Spam need never reach your desktop
- Real-time detection and identification of suspected emails
- Scalability - from 1 to thousands of mailboxes
The Spam-identification tactics used include:
- MailScanner: MailScanner is an open source e-mail security system for use on Unix e-mail gateways.
- SpamAssassin: SpamAssassin is a mail filter which attempts to identify Spam using a variety of mechanisms including text analysis, Bayesian filtering, DNS blocklists, and collaborative filtering databases.
- ClamAV: ClamAV is a GPL anti-virus toolkit for UNIX which provides attachment scanning.
- DCC: DCC (Distributed Checksum Clearinghouse) is an anti-Spam content filter. As of mid-2006, it involves millions of users, tens of thousands of clients and more than 250 servers collecting and counting checksums related to more than 300 million mail messages on week days. The counts are used by our mail user agents to detect and filter Spam.
- Razor: Vipul's Razor is a distributed, collaborative, Spam detection and filtering network. Through user contribution, Razor establishes a distributed and constantly updating catalogue of Spam in propagation that is consulted by email clients to filter out known Spam. Detection is done with statistical and randomized signatures that efficiently spot mutating Spam content. User input is validated through reputation assignments based on consensus on report and revoke assertions which in turn is used for computing confidence values associated with individual signatures.
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