KMail - Trash Folder

openSUSE 12.3 . Kde - 32bit

In KMail (version 4.10 - Account Pop3), where is the “Trash” folder?
If I select a message and then click the “Move to Trash” button, where is the message moved to?
How do I recover accidentally deleted messages?
On the sidebar, there is only “inbox,” “outbox,” and “sent-mail” listed under Local Folders.
Thanks for attention.