In this tutorial we will see how to automatically delete RSS articles in Mail App on Mac OS X Lion System. We have already seen how to add RSS feed in Mail App and if you want remove these articles then you can follow the below mentioned steps.
Click the Mail icon and select Preferences from the menu list.
In the Preferences navigate to RSS tab.
The default value for Remove articles is set to Manually, change this to any other value from the drop down list.
For example if you select the value as “After one day” then the RSS articles will be automatically cleared after one day.