Spam Firewall

Using the KUMC Spam Firewall to Filter Your Emails 

Greeting Message
The first time the KUMC Spam Firewall quarantines an email intended for you, the system sends you a greeting message with a subject line of "User Quarantine Account Information". The greeting message contains the following information:

  • Welcome to the KUMC Spam Firewall. This message contains the information you will need to access your Spam Quarantine and Preferences.
  • Your account has been set to the following username:
    Username: (user's email address)

The KUMC Spam Firewall automatically provides your login information (username) and the link to access the quarantine interface.

Quarantine Summary Report
The KUMC Spam Firewall sends you a daily quarantine summary report at approximately 3:30pm so you can view the quarantined messages you did not receive. From the quarantine summary report you can also add messages to your whitelist, delete messages, and have messages delivered to your inbox. If no messages are in your quarantine at the time of daily message you will not receive a summary report. You may also access your quarantined messages any time of the day by going to the following link and entering you network user id and password.

https://spamfirewall.kumc.edu

The following figure shows an example of a quarantine summary report.

spam firewall email sample

 

Using the Quarantine Interface

At the end of every quarantine summary report is a link to the quarantine interface where you can set additional preferences and classify messages as spam and not spam.

Logging into the Quarantine Interface

To log into the quarantine interface:

  1. Click the link provided at the bottom of the Quarantine Summary Report (displayed above). The login page appears.
  2. Enter the username and password that you use to sign on to the network, and click Login. Your login information resides in the greeting message sent to you from the KUMC Spam Firewall.

Managing your Quarantine Inbox
After logging into the quarantine interface, select the QUARANTINE INBOX tab to view a list of your quarantined messages. When you first start using the quarantine interface, you should view this list on a daily basis and classify as many messages as you can.

The KUMC Spam Firewall has a learning engine that learns how to deal with future messages based on the ones you classify as spam and not spam. The learning engine becomes more effective over time as you teach the system how to classify messages and as you set up rules based on your whitelist and blacklist.

Clicking on an email displays the message.

The following table describes the actions you can perform from this page.

ActionDescription

Deliver

Delivers the selected message to your standard email inbox.

Note: If you want to classify a message or add it to your whitelist, make sure to do so before delivering the message to your inbox. Once the KUMC Firewall delivers the message, it is removed from the quarantine list.

Whitelist

Adds the selected message to your whitelist so all future emails from this sender are not quarantined unless the message contains a virus or banned file type.

The KUMC Spam Firewall adds the sending e-mail address exactly as it appears in the message to your personal whitelist.

Note that some commercial mailings may come from one of several servers such as

"mail3.abcbank.com", and a subsequent message may come from "mail2.abcbank.com". See the section on managing your whitelists and blacklists for tips on specifying whitelists with greater effectiveness.

Delete

Deletes the selected message from your quarantine list. The main reason to delete messages is to help you keep track of which quarantine messages you have reviewed.

You cannot recover messages you have deleted.

Classify as Not Spam

Classifies the selected message as not spam.

Note: Some bulk commercial mail may be considered useful by some users and spam by others. For this reason, classifying such messages may not be very effective because users may counteract each others' classification. Instead of classifying bulk commercial mail, it may be more effective to add it to your whitelist (if you wish to receive such messages) or blacklist (if you prefer not to receive them).

Classify as Spam

Classifies the selected message as spam.

 

Changing your User Preferences

After logging into the quarantine interface, select the PREFERENCES tab to modify your quarantine and spam settings, and manage your whitelist and blacklist.

Changing Your Quarantine Settings

The following table describes the quarantine settings you can change from the PREFERENCES-->Quarantine Settings page.

Quarantine Setting Description

Enable Quarantine

Whether the KUMC Spam Firewall quarantines your messages.

If you select Yes, the KUMC Spam Firewall does not deliver quarantined messages to your general email inbox, but you can view these messages from the quarantine interface and quarantine summary reports.

If you select No, all messages that would have been quarantined for you are delivered to your general email inbox with the subject line prefixed with "[QUAR]:". The KUMC Spam Firewall administrator can modify this prefix.

Notification Interval

The frequency the KUMC Spam Firewall sends you quarantine summary reports. The default is daily. The KUMC Spam Firewall only sends quarantine summary reports when one or more of your emails have been quarantined.

If you select Never, you can still view your quarantined messages from the quarantine interface, but you will not receive quarantine summary reports.

Notification Address

The email address the KUMC Spam Firewall should use to deliver your quarantine summary report. Leave this field blank to use the email address associated with your user account.

 

Enabling and Disabling Spam Scanning of your Email

If you do not want the KUMC Spam Firewall scanning your emails for spam content, you can disable spam filtering from the PREFERENCES-->Spam Settings page. From this page you can also change the default spam scoring levels that determine when your emails are tagged, quarantined or blocked.

When the KUMC Spam Firewall receives an email for you, it scores the message for its spam probability. This score given to the email ranges from 0 (definitely not spam) to 10 or higher (definitely spam). Based on the score given to an email message and the score settings listed under your preferences, the KUMC Spam Firewall either allows, quarantines, or blocks the message.

SettingDescription

Enable Spam

Select Yes for the KUMC Spam Firewall to scan your emails for spam.

Filtering

Select No to have all your messages delivered to you without being scanned for spam.

Spam Scoring

 

Use System Defaults

Select Yes to use the default scoring levels. To configure the scoring levels yourself, select No and make the desired changes in the Spam Scoring Levels section described below.

Spam Scoring Levels 

Tag score

Messages with a score above this threshold, but below the quarantine threshold, are delivered to you with the word [BULK] added to the subject line.

Any message with a score below this setting is automatically allowed.

To disable tagging, change the score to 10.

Quarantine Score

Messages with a score above this threshold, but below the block threshold, are forwarded to your quarantine mailbox.

To enable the quarantine feature, this setting must have a value lower than the block threshold.

To disable the quarantine score feature, change the score to 10.

Block score

Messages with a score above this threshold are not delivered to your inbox. Depending on how the system is configured, the KUMC Spam Firewall may notify you and the sender that a blocked message could not be delivered.

To disable the blocking feature, change the score to 10.

 

Adding Email Addresses and Domains to Your Whitelist and Blacklist

 

The PREFERENCES-->Whitelist/Blacklist page lets you specify email addresses and domains from which you do or do not want to receive emails.

List TypeDescription

Whitelist

A list of e-mail addresses or domains from which you always wish to receive messages. The only time the KUMC Spam Firewall filters a message from someone on your whitelist is when the message contains a virus or a disallowed attachment file extension.

Blacklist

A list of senders from whom you never want to receive messages. The KUMC Spam Firewall immediately discards messages from senders on your blacklist. These messages are not tagged or quarantined and cannot be recovered. The sender does not receive a notice that the message was deleted, and neither do you.

 

To whitelist or blacklist senders, follow these steps:

  • Go to the PREFERENCES-->Whitelist/Blacklist page. A list of your existing whitelisted and blacklisted addresses appears on this page.
  • To delete a whitelist or a blacklist entry, click the trash can icon next to the address.
  • To add an entry, type an e-mail address into the appropriate field, and click the corresponding Add button.

Tips on specifying addresses

When adding addresses to your whitelist and blacklist, note the following tips:

  • If you enter a full email address, such as johndoe@yahoo.com, just that user is specified. If you enter just a domain, such as yahoo.com, all users in that domain are specified.
  • If you enter a domain such as barracudanetworks.com, all subdomains are also included, such as support.barracudanetworks.com and test.barracudanetworks.com.
  • Mass mailings often come from domains that do not resemble the company's web site name. For example, you may want to receive mailings from historybookclub.com, but you will find that this site sends out its mailing from the domain hbcfyi.com. Examine the From: address of an actual mailing that you are trying to whitelist or blacklist to determine what to enter.

Last modified: Dec 11, 2013
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