Macintosh OS X Mail
1. Open Mail.
2. From the Mail menu, select Preferences. Select the Accounts icon and click on your email account under the Description heading. The Account Information appears.
3. Click on the Advanced tab.
4. Make sure that Remove copy from server after retrieving a message: is checked. If you would like to leave messages on the server, click on the field below and select after one day, or after one week, etc. We recommend 14 days max, but you should never leave a copy of email on the server for more than 30 days. Note: You can remove the email from the server immediately by clicking the Remove Now button.
5. Close the Accounts box to return to the email program.
