After you create your mail filters you can modify an existing mail filter. Modifying a mail filter will give you the option of either adding more information to the filter settings or remove existing filter settings.
To modify a mail filter, follow these steps:
Click the Settings tab on the left navigation bar.
Click the Mail button. The Mail Preferences page appears.
On the Mail Preferences page, click the Configure Filters\Blocked Senders button.
The Mail Filters page appears.
In the Mail Filters page, click the Mail Filter # you want to modify.
The Modify Mail Filter page appears.
Click the Modify Mail Filter button.