exim-4.76-1 fails to remove lock from spooler on delivery

[Zdzislaw Meglicki]

I have a problem with exim-4.76-1 on my Cygwin installation under Windows 7. On 
having received a message addressed to a local user, exim creates the lock file 
in the /var/spool/mail directory and ... freezes. The message shows up in mailq 
as "frozen". I have to remove the lock file manually, then run exim -M on the 
message ID for its final delivery into the user file.

Here is an example... I send a message from another machine to user "gustav" on 
"yanchep". The message *does* get appended successfully to file "gustav" in the 
spooler. But the lock does not go away and mailq shows the message as still 
frozen.

root@yanchep /var/spool/mail
$ ls -l
total 8
-rw-rw-rw- 1 gustav Domain Users 7871 Oct 25 17:19 gustav
-rw-rw-rw- 1 gustav Domain Users    0 Oct 25 17:19 gustav.lock
-rw-rw-rw- 1 root   None            0 Oct 25 16:55 root
root@yanchep /var/spool/mail
$ mailq
 0m   696 LTN4KK-0004JW-PT <gustav@indiana.edu> *** frozen ***
          gustav@yanchep.ovpit.indiana.edu

root@yanchep /var/spool/mail
$

In case this has something to do with permissions, here is what they look like 
on this system:

root@yanchep /var/spool   
$ pwd    
/var/spool                                                                                                                       
 
root@yanchep /var/spool 
$ ls -ld                                                         
drwxr-xr-x+ 1 root root 0 Oct 25 15:33 
.                                                                                         
 root@yanchep /var/spool                                          

$ ls -l                                                         
total 0                                                          
drwxrwxrwx+ 1 SYSTEM root 0 Oct 25 15:20 exim                    
drwxrwxrwt+ 1 root   None 0 Oct 25 17:19 
mail                                                                                    
 root@yanchep /var/spool                                          

$ ls -l mail                                                     
total 8                                                          
-rw-rw-rw- 1 gustav Domain Users 7871 Oct 25 17:19 gustav        
-rw-rw-rw- 1 gustav Domain Users    0 Oct 25 17:19 gustav.lock   
-rw-rw-rw- 1 root   None            0 Oct 25 16:55 
root                                                                           
root@yanchep /var/spool  
$

I attach the log of cygcheck -s -r -v on cygcheck.out.gz and my exim.conf.

Zdzislaw Meglicki
Indiana University
http://perth.ovpit.indiana.edu/gustav                                                              
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