By default, when mail is deleted, either by user action or the kill file, it's removed from the database and cannot be recovered.

 

If a Deleted Items mailbox exists, deleted mail will be moved to this special mailbox which has a short retention period (it can be changed in Setup).

 

This special mailbox has to be created in Setup. Add a new mailbox with the following attributes:

 

Name:Deleted Items

 

Email:Deleted.Items@foobar.zetnet.co.uk

 

Use ZIMACS options (Mail/News tab) to enable the mailbox so that it receives deleted mail.