[Evolution] Receiving Options: Leave message on server for x days?

["Patrick M. Kelecy" <pat mp-m com>]

I just wanted to get some clarification on what needs to be checked to
leave mail on the server for a specified number of days.

Do I needed to have both "Leave messages on server" and "Delete after x
days" checked (under Receiving Options), or just "Delete after x
days"?  

I think both, but just wanted to confirm that.

Thanks, -Pat