Palm Tungsten W - Manual (Page 227)

Getting, sending, and managing e-mail
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3. Tap the Older than pick list, and then tap One Week, One Month, or Choose
Date.
If you tap Choose Date, you can select a date from the calendar.
4. Tap Delete.
5. (Optional) Tap Also delete message on server if you want to delete the message
from the server now.
6. Press Function + Enter , or tap OK.
Tap a date to select it,
or tap Today