X-Spam-Flag filter
An X-Spam-Flag filter will catch only messages whose hits percentage meets or exceeds the 50% threshhold currently used by NC State. It will function only when the X-Spam-Flag header has a value of YES. Before you construct a spam filter, be sure to set up a spam folder in the Inbox of your e-mail client so that you can retrieve any legitimate messages caught by the filter.
NOTE: If you have already set up this type of filter for the SpamAssassin software previously used at NC State, you do not need to add a new one for PureMessage.

To construct a spam filter based on the PureMessage X-Spam-Flag header:

1. Open the Mail application.
2. From the Mail menu, select Preferences.
3. Click on the Rules icon.
4. Select Add Rule.
5. Give the rule a name, e.g., spamflag.
6. From the first pull-down menu, select Any.
7. From the second pull-down menu, select Edit Header List.
8. As the name of a new header, type: X-Spam-Flag
9. Select OK.
10. From the second pull-down menu, select X-Spam-Flag.
11. From the third pull-down menu, select Contains.
12. In the text box, type: YES.
13. Under Perform the following actions, select Transfer Message.
14. Choose your spam folder.
15. Select OK.

X-Spam-Level filter
An X-Spam-Level filter can be used to catch messages whose hits percentage is less than the 50% threshhold. You might want to create one if you feel that 50% is too high (doesn't catch enough spam). If you choose a threshhold that is not a multiple of 10 (e.g., 45%), you will need to create two of these filters instead of one. Before you construct a spam filter, be sure to set up a spam folder in the Inbox of your e-mail client so that you can retrieve any legitimate messages caught by the filter.
WARNING: Be very careful if you create an X-Spam-Level filter. The lower the hits percentage you choose for filtering, the more likely you will mistakenly catch legitimate mail and send it to your spam folder.

To construct a spam filter based on the PureMessage X-Spam-Level header:

1. Open the Mail application.
2. From the Mail menu, select Preferences.
3. Click on the Rules icon.
4. Select Add Rule.
5. Give the rule a name, e.g., spamlevel.
6. From the first pull-down menu, select Any.
7. From the second pull-down menu, select Edit Header List..
8. As the name of a new header, type: X-Spam-Level.
9. Select OK.
10. From the second pull-down menu, select X-Spam-Level.
11. From the third pull-down menu, select Contains.
12. Type in your chosen hits percentage using the letters X and/or I:
    • If your percentage is a multiple of ten, type a number of X's equal to the tens digit of the percentage.
      For example, for 60%, you would type 6 X's (upper case):
      XXXXXX
    • If your percentage is not a multiple of ten, type in a number of X's equal to the tens digit followed by a number of I's equal to the ones digit.
      For example, for 65%, you would type 6 X's and 5 I's (upper case):
      XXXXXXIIIII
      NOTE: In this case, you will need to create a secondary filter (see below).
13. Under Perform the following actions, select Transfer Message.
14. Choose your spam folder.
15. Select OK.

If your hits percentage is not a multiple of 10, you will need to create a secondary filter:

1. From the Mail menu, select Preferences.
2. Click on the Rules icon.
3. Select Add Rule.
4. Give the rule a name different from the one above, e.g., spamlevel2.
5. From the first pull-down menu, select Any.
6. From the second pull-down menu, select Edit Header List..
7. As the name of a new header, type: X-Spam-Level.
8. Select OK.
9. From the second pull-down menu, select X-Spam-Level.
10. From the third pull-down menu, select Contains.
11. Type in a number of X's equal to one more than the tens digit of your chosen hits percentage.
    For example, for 65%, you would type 7 X's (upper case):
    XXXXXXX
12. Under Perform the following actions, select Transfer Message.
13. Choose your spam folder.
14. Select OK.

X-Virus-Detected filter
By using an X-Virus-Detected filter and creating a virus folder in the Inbox of your e-mail client, you can retrieve legitimate messages that arrived with virus-laden attachments that were later removed by PureMessage. Be sure to set up your virus folder before you construct a virus filter.

To construct a virus filter based on the PureMessage X-Virus-Detected header:

1. Open the Mail application.
2. From the Mail menu, select Preferences.
3. Click on the Rules icon.
4. Select Add Rule.
5. Give the rule a name, e.g., virus.
6. From the first pull-down menu, select Any.
7. From the second pull-down menu, select Edit Header List..
8. As the name of a new header, type: X-Virus-Detected
9. Select OK.
10. From the second pull-down menu, select X-Virus-Detected.
11. From the third pull-down menu, select Contains.
12. In the text box, type: YES.
13. Under Perform the following actions, select Transfer Message.
14. Choose your virus folder.
15. Select OK.

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