[exim] Spool file not found

I keep getting a bunch of spool file not found errors, like this:

2016-04-09 00:34:13 1aogqr-0001Nl-MN Spool file 1amYf4-0008Hm-7j-D not found
2016-04-09 00:34:13 1aogqr-0001Nl-MN Spool file 1amYgz-0008Ke-Hp-D not found
2016-04-09 00:34:13 1aogqr-0001Nl-MN Spool file 1amYgz-0008KT-Dj-D not found
2016-04-09 00:34:13 1aogqr-0001Nl-MN Spool file 1amYf4-0008Hl-7i-D not found
2016-04-09 00:34:13 1aogqr-0001Nl-MN Spool file 1amYf4-0008Ha-1s-D not found

The complete list is about 25 messages long and it repeats in the log
often, but not at consistent times. I thought maybe every minute or
something, but it might happen 2 times in a minute and it might not happen
for 3 minutes.

I checked the queue, and no such files even exist in the queue.

What is Exim doing?

I took one message, with id 1amYf4-0008Hm-7j and found the first instance
in the logs. It first shows up on March 3, 2016.

A message delivery was attempted, the remote server rejected it and an
undelivered notice was created with the ID 1amYer-0008FE-VG.

The undelivered notice with ID 1amYer-0008FE-VG was delivered successfully.

2016-04-03 04:45:57 1amYf4-0008Hm-7j Completed

Every since then, exim keeps trying to deliver the message - even though it
was delivered and does not exist on the disk anymore.

I have stopped and started Exim but it continues to look for the same batch
of messages that do not exist on the disk. How do I correct this and
prevent it from happening?


Robert G.