Known Spam/Suspected Spam

To intelligently apply resources, Policy Patrol Spam Filter pre-classifies spam as known spam or suspected spam. This allows you to delete known spam and concentrate only on the suspected spam. In this way, users can simply review the suspected spam in their quarantine reports or junk mail folders, instead of sifting through a daunting list of daily spam messages that can easily exceed one hundred emails per user per day.

Spam Quarantine Reports

With the daily (or hourly) quarantine report, users will never miss a legitimate email again. Users can quickly skim through the list of newly quarantined spam messages from within Outlook and deliver emails and/or white list addresses. The advantage of using the quarantine report instead of forwarding spam to the user's junk mail folder is that the user is reminded to check the quarantined messages and will quickly be able to detect and deliver any wrongly quarantined emails.

Web Manager

For users: Users can view their quarantined emails from the Policy Patrol Web Manager. They can deliver and delete messages and add entries to the black list and white list. By allowing users to manually add an address to the white list, users can white list an email address before the email is received, which can be useful when signing up for a newsletter or new service, and the user is asked to white list an email address.

For Administrators: Administrators can view, release, and delete messages, and update white lists and black lists via the web console as well as the Administration console.

Quarantine, Delete, Add Tag or Header

Policy Patrol Spam Filter can reject (i.e. not download messages that are listed on real-time black lists or do not have valid recipients), quarantine (i.e. place spam messages on hold on the server), delay, delete, add a custom header or add a tag to the subject of spam messages.

Forward to Junk Mail Folder

Policy Patrol Spam Filter can automatically forward spam to the individual user's junk mail folder. Policy Patrol can also forward spam messages to a public folder.

Anti-Spam Reports

Policy Patrol Spam Filter includes several anti-spam reports providing an overview of the number of spam messages received, the top spam domains, spam senders and spam receivers, DNSBL and SURBL lists results and much more. Anti-spam reports can be automatically generated and emailed to specified users.

Detailed Tracking

For every message, Policy Patrol Spam Filter displays an anti-spam report that shows the results of each anti-spam check performed (including words and their score if appropriate). This allows you to adjust your filters and conditions according to your specific requirements.

Anti-Spam Techniques

Policy Patrol Spam Filter uses a multi-layered approach to block and filter spam messages, utilizing a combination of different anti-spam techniques:

Greylisting

Policy Patrol Spam Filter uses greylisting to effectively block spam and viruses by rejecting initial emails from new (non white-listed) senders for one minute. Legitimate emails will still get through, but spam messages will not. This is because unlike spam engines and zombie machines, regular mail servers resend their messages upon initial rejection.

Bayesian Filtering

Policy Patrol Spam Filter uses Bayesian filtering to statistically analyze email content in order to determine whether the message is legitimate or spam. By comparing the contents of an email message with words in a legitimate and spam database, Policy Patrol Spam Filter calculates the probability that a message is spam. Policy Patrol Spam Filter includes automatic email learning to keep the filters up to date.

Real-Time Blacklists (RBL)

By checking sender IP addresses on real-time blacklists, Policy Patrol Spam Filter can stop spam from entering your mail server, thus saving the bandwidth used to download the messages.

Spam URL Realtime Block Lists (SURBL)

As opposed to RBL lists that include sender IP addresses and domains, SURBL lists are used to check URLs contained in the body of email messages. Even if spammers try to bypass existing heuristic and Bayesian filters by replacing text with images or including minimal text, they will still need to include a URL to be contacted on. Therefore checking the URLs against a list of known spam domains provides an important additional layer of protection and can be successful where other filtering methods fail. SURBL lists require zero administration, are constantly updated and fine-tuned and most of them are free to use. SURBL Lists also provide specific protection against the growing problem of phishing since they include URLs of known phishing sources.