Please describe the problem:
Configuration for "Local Delivery" fails.  As described in the gnome documentation below, a user should be able to specify the unix mbox spool file to draw new mail from.  However,the configuration system in fact only allows you to specify the directory where the spool file is located; it won't let you specify a file.  Then, when the user tries to get new mail, evolution complains about not being able to open the file, and that it has only been provided a directory. 

"Local Delivery:Choose this option if you want to move e-mail from the spool
(the location where mail waits for delivery) and store it in your home
directory. You need to provide the path to the mail spool you want to use. If
you want to leave e-mail in your system’s spool files, choose the Standard
Unix Mbox Spool option instead. For configuration instructions, see Local
Configuration Options." As noted above, this doesn't work as stated.

Steps to reproduce:
1. Go to preferences
2. Edit account
3. Select local delivery
4. Try to choose the mbox file.  You will not be able to do it.  Choose the directory (/var/spool/mail for example) where the mbox file resides anyway.
5. Save preferences (even though wrong) and return to mail 
6. Try to get mail.  You will get an error message.


Actual results:
You can't correctly set, in preferences, the proper location for the unix mbox file to get email from. Further, if you try to fetch mail from a directory, which is all the preference tool will let you choose, mail can't be fetched from the unix spool file. 

Expected results:
User should be able to correctly set, in preferences, the unix spool file to retrieve mail from. 

Does this happen every time?
Yes

Other information:
Two workarounds:
1) (Best) Use gconf-editor to change key value in apps:evolution:mail:accounts by putting the correct mbox spool file into the path.
2) (OK) Select Standard Unix mbox spool file as the server type in the account editor.  Drawback is that mail will remain in the spool file, where with local delivery, mail will be moved into the evolution folder set.