C&C has implemented two levels of SPAM filtering, recognizing that its effectiveness will have to be monitored and adjustments made as spamming methods evolve.
Level one: Server level filtering (Ongoing)
Server level filtering has been used by C&C for some time. It targets particular sites that are known to send SPAM. We reject e-mail from those sites.
Level two: Client level filtering
We are using a software package called SpamAssassin to evaluate incoming SPAM messages. This software scores incoming e-mails, based on a set of spam criteria, to determine how likely it is to be SPAM. Anything scoring above eight is automatically deleted. Anything scoring between four and eight is marked "xxSPAMxx" and is delivered to the INBOX. Users can ask for their SPAM filter to be set to four.
C&C will check incoming e-mail and tag any suspected SPAM before forwarding to the recipient. We will evaluate probable SPAM as "xxSPAMxx" in the subject line of suspected e-mail. Evaluating e-mail for possible SPAM should allow for easier identification and filtering. The recipient can continue to review those messages and delete them manually or use a filter to delete the e-mail automatically or move it to a separate folder for future review or deletion.
No SPAM filtering system is 100% accurate, thus there will be false-positives (e-mail that is marked as SPAM but is not) and false-negatives (e-mail that is not marked as spam but should be). Keeping this in mind, it is the end user's responsibility to manage his/her e-mail appropriately. C&C recommends checking your INBOX and all other e-mail folders regularly.
Users may choose to opt out of auto-deletion of SPAM, or they may choose to set a lower threshold.
If you receive large amounts of SPAM, you may set a filter to redirect these tagged e-mails. Through our internal testing we did encounter several cases where mail was incorrectly tagged. (Mailing list announcements are prime candidates).
A filter is a program which sorts and processes incoming e-mail based on patterns found in the e-mail headers. There are three pre-existing filters (or rules) already created in webmail.mun.ca which you can activate if you choose: Blacklist, Vacation, and Whitelist. You can also create new filers (or rules) to filter your mail based on patterns you choose.
For assistance with activating pre-existing filters (rules) or setting up new filters (rules) - click on the Filters icon on the menu bar on the bottom of your screen. A window will open which display the various rules/filters. To learn more about the individual rules/filters click on the Help icon or to activate or create a new rule - click on the particular rule icon.