Berkeley DB error /var/spool/exim/db/retry: unexpected file type or format

This problem occur when  receiving the emails in the inbox.

When you facing the above error simply do below following steps to resolve it ,

1) Login to the server as root and stop the EXIM service using below commands :-

root@master[#] /etc/init.d/exim stop

2) root@master[#]  cd /var/spool/exim/db/

after that you need to take a backup of “/db” for security purpose  and remove all the files.

root@master[#]  cp -Ra db/ db.bk/  (For taking a backup )

3) root@master[#]  cd /var/spool/exim/db/

4) root@master[#]  rm -rf *  (for remove/delete files)

And start the EXIM service so the new “db” is automatically created,

5) /etc/init.d/exim start 

Here your issue is resolved 😀